JP7051161B2 - Crop-related value derivation device and crop-related value derivation method - Google Patents

Description

The present invention relates to a crop-related value derivation device for deriving a crop-related value related to a crop and a method for deriving a crop-related value.

Conventionally, for crops cultivated in the field, it has been known that there is a relationship between the value of the index (for example, NDVI) regarding the growth of the crop and the appropriate amount of fertilizer applied at the time of topdressing. , The value of the index is acquired, and the amount of fertilizer applied at the time of topdressing is obtained based on the value of the index. In Patent Document 1, a technique is provided in which the entire field is photographed by a camera provided remotely from the field to the extent that the entire field can be photographed, and crop information (index value) for the field is obtained based on the photographed result. Have been described.

Japanese Unexamined Patent Publication No. 2008-136411

The amount of fertilizer applied at the time of topdressing has a strong influence on the growth of crops after topdressing and, by extension, the condition of the harvested product (quality and yield of the harvested product, etc.). Therefore, regarding the derivation of the fertilizer application amount at the time of top dressing, if there is a research result, it is required to derive the fertilizer application amount with higher accuracy by using the result. Such a problem can occur widely not only in the derivation of the amount of fertilizer applied at the time of top dressing but also in the derivation of the crop-related values related to the crop.

The present invention has been made to solve such a problem, and an object of the present invention is to be able to derive crop-related values with higher accuracy based on the results of research.

In order to solve the above-mentioned problems, in the present invention, with respect to the crop-related values related to the crop in which the condition of the predetermined weather condition in the first half of the growth affects the growth, the condition of the predetermined weather condition in the first half of the growth of the crop. The crop-related values are derived by a method that reflects the above.

As a result of research, the inventors have found that there are crops whose growth is affected by the conditions of predetermined weather conditions in the first half of the growth period, and the crop-related values related to such crops are simply the crop index values (crops growth). Rather than deriving crop-related values using (values of indicators related to), it is better to derive crop-related values by reflecting the conditions of predetermined weather conditions in the first half of the growth of crops. I found out what I could do. As an example, when deriving the amount of fertilizer applied at the time of topdressing, the amount of fertilizer applied is not simply derived using the value of the index related to the growth of the crop (NDVI value, etc.), but the situation of the predetermined weather conditions in the first half of the growth of the crop. It was found that the fertilizer application amount can be derived with higher accuracy by deriving the fertilizer application amount reflecting the above. Based on this, according to the present invention configured as described above, for crops whose growth is affected by the conditions of predetermined weather conditions in the first half of growth, in deriving the crop-related values, the predetermined first half of growth of the crop is determined. Since the crop-related values are derived by a method that reflects the weather conditions of the above, it is possible to derive the crop-related values with higher accuracy.

It is a block diagram which shows the functional composition example of the crop-related value derivation apparatus which concerns on one Embodiment of this invention. It is a figure which shows an example of an input screen. It is a figure which shows the relationship between the fertilizer application amount at the time of top dressing, and NDVI at the measurement timing. It is a flowchart which shows the operation example of the crop-related value derivation apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows the operation example of the crop-related value derivation apparatus which concerns on one Embodiment of this invention. It is a figure which shows the input and output of a model. An example of the screen displayed on the display device

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a functional configuration example of the crop-related value derivation device 1 according to the present embodiment. The crop-related value derivation device 1 derives the amount of fertilizer to be applied at the time of topdressing (details of topdressing will be described later) for rice cultivation (hereinafter referred to as “the amount of fertilizer applied at the time of topdressing”), and provides the user with information indicating the amount of fertilizer applied at the time of topdressing. It is a device to do. The amount of fertilizer applied at the time of top dressing corresponds to the "crops-related value" in the claims. The user can determine the amount of fertilizer actually applied at the time of topdressing by referring to the information indicating the amount of fertilizer applied at the time of topdressing provided by the crop-related value derivation device 1. In the present embodiment, the term fertilizer application refers to the amount of fertilizer per unit area unless otherwise specified, and the term yield refers to the yield of rice per unit area.

In the following explanation, regarding the target rice and rice cultivation, the rice varieties, the environment in which the rice is cultivated (regions (cold regions, warm regions, dry regions, etc.), altitude, field scale), rice cultivation methods, fertilizers The type of rice and other external factors that affect the growth of rice shall be common. Therefore, the fertilizer application amount at the time of topdressing derived by the crop-related value derivation device 1 is referred to as an appropriate fertilizer application amount when a specific type of fertilizer is applied to a specific variety of rice cultivated by a specific method in a specific environment. That is.

In this embodiment, "topdressing" means the following. That is, in general, in one stage, rice is transplanted from the seedling to the field by rice planting, and then the tillering stage → the panicle formation stage → the heading stage → the flowering / pollination stage → the panicle stage → the ripening stage → the maturity stage. It grows through the stage. During the period from around the panicle formation stage to around the heading stage (hereinafter referred to as the "topdressing target period"), the purpose is usually to increase the number of paddy that grows on the spikes and the amount of starch that clogs the paddy. , Addition of fertilizer called spike fertilizer is performed at a predetermined timing. And in this embodiment, "topdressing" means the addition of fertilizer performed at a predetermined timing in the topdressing target period.

As shown in FIG. 1, a display device 2 such as a liquid crystal display or an organic EL display and an input device 3 such as a mouse or a keyboard are connected to the crop-related value derivation device 1. Further, as shown in FIG. 1, the crop-related value derivation device 1 includes a crop-related value derivation unit 10 as a functional configuration. The crop-related value derivation unit 10 can be configured by any of hardware, DSP (Digital Signal Processor), and software. For example, when configured by software, the agricultural product-related value derivation unit 10 is actually configured to include a computer CPU, RAM, ROM, etc., and a program stored in a recording medium such as RAM, ROM, hard disk, or semiconductor memory. It is realized by operating. Further, the crop-related value derivation device 1 includes a storage unit 11 as a storage means. The data stored in the storage unit 11 will be described later.

Here, when the user causes the crop-related value derivation device 1 to derive the fertilizer application amount at the time of top dressing, the user instructs the input device 3 to operate the input device 3 to display the input screen G1 on the display device 2. In response to this instruction, the crop-related value derivation unit 10 displays the input screen G1 on the display device 2.

FIG. 2 is a diagram showing an input screen G1. As shown in FIG. 2, the input screen G1 has a target yield input field N1 for inputting a target yield, a target low appearance quality ratio input field N2 for inputting a target low appearance quality ratio, and a target protein content rate. An input field N3 is provided. Three radio button RBs are provided corresponding to each of the three input fields, and the user inputs only to one input field selected by checking the radio button RB among the three input fields. It can be carried out.

Regarding the target yield input field N1, the target yield means the yield of the target agricultural product (harvest) in this period (target period) (yield per unit area as described above). The target yield input field N1 is an input field with a pull-down menu, and a plurality of selectable target yield candidates are listed as items in the pull-down menu. When inputting the target yield, the user selects and inputs one candidate from the target yield candidates listed in the pull-down menu of the target yield input field N1. Hereinafter, when the user inputs the target yield, the input (selected) target yield is referred to as "input target yield". As will be clarified later, the crop-related value derivation device 1 derives the necessary and appropriate fertilizer application amount at the time of topdressing in order to set the crop yield as the input target yield.

Regarding the target low appearance quality ratio input field N2, the low appearance quality ratio means the ratio of the low appearance quality harvest to the entire harvest (hereinafter referred to as “low appearance quality ratio”). In the present embodiment, the low-appearance quality harvest is defined as white immature grains (belly white grains, spine white grains, base immature grains, heart white grains, milky white grains, etc.). Therefore, the low appearance quality ratio means the ratio of the white immature grain crop to the total crop. However, the definition of the low-appearance quality harvested product is not limited to that exemplified in this embodiment, and for example, immature grains other than white immature grains, damaged grains, dead rice, colored grains, etc. are defined as low-appearance quality harvested products. May be included in. The target low appearance quality ratio means the target low appearance quality ratio in this term (target period).

The target low appearance quality ratio input field N2 is an input field with a pull-down menu, and a plurality of selectable target low appearance quality ratio candidates are listed as items in the pull-down menu. When inputting the target low appearance quality ratio, the user selects and inputs one candidate from the candidates of the target low appearance quality ratio listed in the pull-down menu of the target low appearance quality ratio input field N2. Hereinafter, when the user inputs the target low appearance quality ratio, the input (selected) target low appearance quality ratio is referred to as an “input target low appearance quality ratio”. As will become clear later, the crop-related value derivation device 1 derives a fertilizer application amount at the time of topdressing necessary and appropriate for setting the low appearance quality ratio as the input target low appearance quality ratio.

Regarding the target protein content input field N3, the protein content means the protein content of brown rice in the harvest, and the target protein content is the target protein content in this term (target period). Means. The target protein content corresponds to the "target quality of the components of the harvest" in the claims.

The target protein content input field N3 is an input field with a pull-down menu, and a plurality of selectable target protein content candidates are listed as items in the pull-down menu. When inputting the target protein content rate, the user selects and inputs one candidate from the target protein content rate candidates listed in the pull-down menu of the target protein content rate input field N3. Hereinafter, when the user inputs the target protein content, the input (selected) target protein content is referred to as "input target protein content". As will be clarified later, the crop-related value deriving device 1 derives a fertilizer application amount at the time of topdressing, which is necessary and appropriate for setting the protein content as the input target protein content.

Yield, low appearance quality ratio and protein content each correspond to the "crop condition (future condition)" of the claims. In addition, the target yield (input target yield), target low appearance quality ratio (input target low appearance quality ratio), and target protein content (input target protein content) correspond to the "target state of agricultural products" within the scope of the claims. ..

After inputting any one of the target yield, the target low appearance quality ratio, and the target protein content rate, the user operates the confirmation button BT on the input screen G1 to confirm the input. When it is detected that the input is confirmed, the crop-related value derivation device 1 derives the amount of fertilizer applied at the time of topdressing of the target field (in the case where a plurality of fields are targeted, each of the plurality of fields), and fertilizes at the time of topdressing. Provide information indicating the quantity. Hereinafter, the operation of the crop-related value derivation device 1 when deriving the amount of fertilizer applied at the time of topdressing in the field and providing information indicating the amount of fertilizer applied at the time of topdressing will be described in detail. In the following description, for convenience of explanation, the crop-related value derivation device 1 shall derive the fertilizer application amount at the time of top dressing for a certain field. In addition, the target field from which the amount of fertilizer applied at the time of top dressing is derived is referred to as "target field".

When the crop-related value derivation unit 10 detects that the input to the input screen G1 is confirmed, the crop-related value derivation unit 10 executes the following processing. That is, the crop-related value derivation unit 10 accesses the storage unit 11 and acquires the information on the amount of solar radiation in the first half of the growth period stored in the storage unit 11. The information on the amount of solar radiation in the first half of the growing season is information indicating the amount of solar radiation in the first half of the growing season (corresponding to the "state of predetermined weather conditions" in the claims). In the present embodiment, the first half of growth indicates the period from transplanting to the field to the time of topdressing. Further, in the present embodiment, the amount of solar radiation in the first half of growth means whether or not the average total amount of solar radiation in the first half of growth in the area including the field exceeds a predetermined reference value (threshold value). .. In the following explanation, when the average total amount of solar radiation exceeds the standard value, it is called "multi-illumination", and when it is below the standard value, it is called "illumination".

Insolation information for the first half of growth is generated in advance based on, for example, information on the amount of solar radiation released by the Japan Meteorological Agency, local governments and other organizations, and observations by the person who manages the field (concept including organizations and groups). To. The definition of the first half of growth and the definition of the amount of solar radiation in the first half of growth in this embodiment are merely examples. Other examples of how to define the first half of growth and how to define the amount of solar radiation in the first half of growth will be described later.

After acquiring the information on the amount of solar radiation in the first half of the growth period, the crop-related value derivation unit 10 determines whether the first half of the growth period in this period was multi-illuminated or lit up based on the information on the amount of solar radiation in the first half of the growth period. In addition, the crop-related value derivation unit 10 acquires information indicating the average total solar radiation amount, and determines whether or not the average total solar radiation amount exceeds the standard value, so that the first half of the growth period of this season is highly illuminated. It may be configured to determine whether it was warm or ill. In addition, the user inputs information indicating whether the first half of the growing season was multi-illuminated or lit-lit, or information indicating the average total insolation amount, and the information input by the crop-related value derivation unit 10 is acquired and acquired. Based on the information, it may be configured to determine whether the first half of the growth of this season was multi-illuminated or lit-lit.

After determining whether the first half of the growing period was high or low, the crop-related value derivation unit 10 determined whether the target state of the crop input on the input screen G1 was the target yield, the target low appearance quality ratio, or the target. Perform different treatments depending on the protein content. Hereinafter, the processing of the crop-related value derivation unit 10 for each case will be described.

<For target yield>
First, the processing of the crop-related value derivation unit 10 when the target state of the crop input to the input screen G1 is the target yield will be described. When the target state is the target yield and the first half of the growing season is lit up, the crop-related value derivation unit 10 accesses the storage unit 11 and NDVI about the target field stored in the storage unit 11. Get information. The NDVI information about the target field is information indicating the value of the NDVI measured at the measurement timing (corresponding to the "predetermined timing" in the claims) for the target field. The measurement timing is a predetermined timing as a timing for measuring the NDVI used for deriving the fertilizer application amount at the time of top dressing. For example, immediately before the timing of top dressing, 3 weeks before heading, 4 weeks before heading, etc. It is said that. The crop-related value derivation unit 10 acquires the NDVI value (hereinafter referred to as “target NDVI”) for the target field at the measurement timing based on the acquired NDVI information. The target NDVI corresponds to "a crop index value which is a value of an index relating to crop growth at a predetermined timing" and "a value of a vegetation index measured for a group of crops" in the claims.

In the present embodiment, the crop-related value derivation unit 10 acquires the target NDVI based on the NDVI information about the target field, but the crop-related value derivation unit 10 acquires the NDVI value based on the predetermined data. May be derived by arithmetic processing and the target NDVI may be acquired. For example, image data generated by photographing the target field from the sky by a multispectral sensor mounted on the drone is stored in the storage unit 11, and the crop-related value derivation unit 10 derives the target NDVI based on the image data. , It may be a configuration to acquire.

On the other hand, when the first half of the growth period of this period is abundant, the crop-related value derivation unit 10 accesses the storage unit 11 and acquires the SPAD information about the target field stored in the storage unit 11. The SPAD information for the target field is information indicating the value of SPAD measured at the measurement timing for the target field. The crop-related value derivation unit 10 acquires a SPAD value (hereinafter referred to as “target SPAD”) for the target field at the measurement timing based on the acquired SPAD information. The target SPAD corresponds to "a crop index value which is a value of an index relating to the growth of a crop at a predetermined timing" and "a value of an index relating to chlorophyll measured for the leaves of the crop" in the claims.

As described above, when the target yield is input as the target state and the target yield is input as the target state, the crop-related value derivation unit 10 acquires the target NDVI when the first half of the growing season is lit, and acquires the target SPAD when the target state is high. .. The reason for this will become clear later.

After acquiring the target NDVI or the target SPAD, the crop-related value derivation unit 10 uses the fertilizer application amount derivation formula for the target yield corresponding to the input target yield as the fertilizer application amount at the time of topdressing when the first half of the growth period of this period is illuminating. Determined as the formula used for derivation. The formula for deriving the amount of fertilizer applied at the time of lighting corresponding to the target yield corresponds to the "second crop-related value deriving formula" in the claims. On the other hand, the crop-related value derivation unit 10 uses the formula for deriving the fertilizer application amount at the time of topdressing as the formula for deriving the fertilizer application amount at the time of topdressing, which corresponds to the target yield corresponding to the input target yield, when the first half of the growth period of this season is multi-illumination. decide. The formula for deriving the amount of fertilizer applied during multiple lighting corresponding to the target yield corresponds to the "first formula for deriving the value related to crops" in the claims.

The target yield corresponding to a certain target yield The derivation formula of the fertilizer application amount at the time of illuminating is the NDVI at the measurement timing and the fertilizer application amount at the time of topdressing when the yield of the crop is set to the target yield when the first half of the growth is illuminating. It is an expression showing the relationship with. That is, the formulas for deriving the amount of fertilizer applied at the time of lighting corresponding to the target yield are formulas that define the relationship between the target yield, the value of NDVI, and the amount of fertilizer applied at the time of topdressing. Therefore, according to the fertilizer application amount derivation formula corresponding to the target yield corresponding to a certain target yield, when the first half of the growth is the light and the NDVI value at the measurement timing is the target NDVI, the yield of the crop is the target yield. Therefore, it becomes clear how much fertilizer should be applied at the time of top dressing.

FIG. 3 shows the yield of crops when the first half of growth is lit by a linear expression drawn in a two-dimensional space with the NDVI value of the measurement timing as the vertical axis and the amount of fertilizer applied at the time of topdressing as the horizontal axis. It is a figure which simplifies the relationship between the NDVI of the measurement timing and the fertilizer application amount at the time of topdressing when a predetermined target yield is set. As shown in FIG. 3, there is a correlation between the NDVI value at the measurement timing when the yield of the crop is set to a predetermined target yield and the fertilizer application amount at the time of topdressing, as the NDVI increases, the fertilizer application amount at the time of topdressing decreases. be.

In the present embodiment, the fertilizer application amount derivation formula corresponding to the target yield is derived in advance for each selectable target yield (candidate target yield). The target yield corresponding to each target state is the relationship between the actual amount of fertilizer applied at the time of topdressing in the past when the first half of the growth was light, the NDVI value at the measurement timing, and the yield of the crop. , The yield of crops is used as the objective variable, and the amount of fertilizer applied at the time of topdressing and the NDVI at the measurement timing are used as explanatory variables. More specifically, data showing the relationship between the combination of NDVI values at the time of topdressing and the measurement timing when the first half of growth was lit by experiments and observations on existing fields in advance, and the yield of crops. Is accumulated. In other words, there is data that the yield of crops was XX when the amount of fertilizer applied at the time of top dressing was XX and the NDVI value at the measurement timing was XX when the first half of growth was lit. A considerable number is accumulated.

Then, for the accumulated data, a multiple regression analysis is performed with the yield of the crop as the objective variable and the NDVI at the time of fertilization and the measurement timing as the explanatory variables, and the yield of the crop is the target yield at the time of topdressing. A multiple regression equation that defines the relationship between the fertilizer application amount and NDVI at the measurement timing is derived, and this is the fertilizer application amount derivation equation for the target yield. Corresponding to the target yield The formula for deriving the fertilizer application amount at the time of illumination is derived for each selectable target yield (candidate target yield). The formula for deriving the fertilizer application rate at the time of illuminating the target yield corresponding to a certain target yield defines the relationship between the NDVI and the fertilizer application rate at the time of topdressing at the measurement timing when the yield of the crop is set as the target yield.

For example, if the target yield is expressed by Y, the formula for deriving the fertilizer application amount corresponding to the target yield related to Y is "Y = a + bN + cM" (a, b, c are constants. N is the fertilizer application amount at the time of topdressing, and M is NDVI. It is expressed by an expression such as (value). According to the fertilizer application amount derivation formula corresponding to the target yield, if Y and M are determined, N is determined. Since the formula for deriving the amount of fertilizer applied during illumination corresponding to the target yield is derived by the above method, the formula for deriving the amount of fertilizer applied during lighting corresponding to a certain target yield is used to measure the amount of fertilizer applied during the first half of growth. When the value of NDVI at the timing is a predetermined value, it is possible to obtain the amount of fertilizer applied at the time of topdressing necessary and appropriate for the yield of the crop to be the target yield.

On the other hand, the formula for deriving the fertilizer application amount at the time of multi-illumination corresponding to a certain target yield is the value of SPAD (NDVI) at the measurement timing when the yield of the crop is set to the target yield when the first half of the growth is multi-illumination. It is an equation showing the relationship between (not the value of) and the amount of fertilizer applied at the time of topdressing, and is prepared in advance for each selectable target yield (candidate target yield). In other words, the formulas for deriving the amount of fertilizer applied at the time of multiple lighting corresponding to the target yield are formulas showing the relationship between the target yield of the crop, the value of SPAD, and the amount of fertilizer applied at the time of topdressing. When the yield of agricultural products is set as the target yield, there is a correlation between the value of SPAD at the measurement timing and the amount of fertilizer applied at the time of topdressing.

By using the fertilizer application amount derivation formula for the target yield corresponding to a certain target yield, when the SPAD value at the measurement timing is a predetermined value in the case of multiple lighting in the first half of the growing period, the crop is It is possible to determine the amount of fertilizer applied at the time of topdressing, which is necessary and appropriate for the yield to be the target yield. The formula for deriving the amount of fertilizer applied at the time of high lighting corresponding to the target yield is the same as the formula for deriving the amount of fertilizer applied at the time of high lighting corresponding to the target yield. This is a formula derived by multiple regression analysis with the yield of the crop as the objective variable and the value of SPAD and the amount of fertilizer applied at the time of topdressing as the explanatory variables for the relationship between the yield and the yield of the crop.

After determining the formula to be used for deriving the fertilizer application amount at the time of topdressing (the formula for deriving the fertilizer application amount at the time of target yield or the formula for deriving the fertilizer application amount at the time of high lighting corresponding to the target yield), the crop-related value derivation unit 10 uses the determined formula. It is used to derive the amount of fertilizer applied at the time of top dressing. For example, when the formula for deriving the fertilizer application amount at the time of lighting for the target yield is determined as the formula to be used for deriving the fertilizer application amount at the time of topdressing, the crop-related value derivation unit 10 prepares for each selectable target yield and fertilizes at the time of lighting. Among the amount derivation formulas, specify the fertilizer application amount derivation formula corresponding to the target yield corresponding to the input target yield. Next, the crop-related value derivation unit 10 obtains the fertilizer application amount by inputting the target NDVI into the specified target yield-corresponding fertilizer application amount derivation formula, and uses this as the fertilizer application amount at the time of topdressing. As an example, it is assumed that the formula for deriving the fertilizer application amount at the time of lighting corresponding to the target yield is "Y = 50 + 100N + 500M" (however, Y is the target yield, N is the fertilizer application amount at the time of topdressing, and M is the value of NDVI). In this case, assuming that Y (yield) is "600 [kg]" and M (value of NDVI) is 0.7, "2 [kg]" is obtained as N (fertilization amount at the time of topdressing). Can be done.

Further, for example, when the formula for deriving the fertilizer application amount at the time of topdressing is determined as the formula used for deriving the fertilizer application amount at the time of topdressing, the crop-related value derivation unit 10 prepares the target yield corresponding to the selectable target yield. Among the formulas for deriving the amount of fertilizer applied during lighting, the formula for deriving the amount of fertilizer applied during multiple lighting corresponding to the input target yield is specified. Next, the crop-related value derivation unit 10 obtains the fertilizer application amount by inputting the target SPAD into the specified target yield-corresponding multi-illumination fertilizer application amount derivation formula, and uses this as the fertilizer application amount at the time of top dressing. As an example, it is assumed that the formula for deriving the fertilizer application amount at the time of multiple lighting corresponding to the target yield is "Y = 50 + 100N + 10M" (where Y is the target yield), N is the fertilizer application amount at the time of topdressing, and M is the value of SPAD). In this case, assuming that Y (yield) is "600 [kg]" and M (SPAD value) is 35, "2 [kg]" can be obtained as N (fertilization amount at the time of topdressing). ..

After deriving the fertilizer application amount at the time of top dressing, the crop-related value derivation unit 10 controls the display device 2 to display the derived information indicating the fertilizer application amount at the time of top dressing in the display area of the display device 2. By referring to the display device 2, the user can recognize the amount of fertilizer applied at the time of topdressing derived by the crop-related value derivation device 1 for the target field, and is a useful reference when determining the amount of fertilizer actually supplied at the time of topdressing. It can be used as information.

As described above, the crop-related value derivation device 1 according to the present embodiment adopts the target yield-corresponding fertilizer application amount derivation formula when the target yield is input and the first half of the growing period is illuminating. In some cases, the formula for deriving the amount of fertilizer applied during high-lighting for the target yield is adopted, and the formula is changed according to the amount of solar radiation in the first half of growth to derive the amount of fertilizer applied during topdressing. The formula for deriving the fertilizer application amount at the time of fertilization corresponding to the target yield is a formula derived based on the actual results when the first half of the growth was illuminating in the past, and the relationship between the NDVI value and the fertilizer application amount at the time of topdressing for each target yield. Is defined. On the other hand, the formula for deriving the fertilizer application amount at the time of high light for the target yield is a formula derived based on the actual results when the first half of the growth was high light in the past, and the SPAD value and the fertilizer application amount at the time of topdressing for each target yield. Define the relationship with. With such a configuration, the following effects are obtained.

That is, conventionally, it has been practiced to derive the amount of fertilizer applied at the time of topdressing in order to set the yield of agricultural products as the target yield based on the value of NDVI measured before topdressing. Here, the inventors may not be able to obtain sufficient accuracy if the amount of fertilizer applied at the time of topdressing is derived based on the value of NDVI without considering the amount of solar radiation in the first half of the growth period. I found. This is assumed to be due to the following reasons. That is, NDVI is affected by the vegetation coverage and leaf color of agricultural products (rice in this embodiment). For this reason, regarding NDVI, there are cases where the amount of solar radiation in the first half of growth is large and the growth is good due to this, the vegetation coverage is high and the leaf color is light, and the amount of solar radiation in the first half of growth is small, which causes growth. There may be no clear difference in the NDVI value between the case where the planting coverage is low and the leaf color is dark due to the defect. In other words, although the degree of growth of crops is actually quite different due to the amount of solar radiation in the first half of the growing season, the difference may not appear as a difference in NDVI values. The above matters are assumed to be one of the reasons.

Based on the above, according to the present embodiment, when deriving the amount of fertilizer applied at the time of topdressing, the amount of fertilizer applied is derived by a method that reflects the amount of solar radiation in the first half of the growth of the crop (rice). In terms of points, it is possible to derive the amount of fertilizer applied at the time of topdressing with higher accuracy.

Further, in the present embodiment, the target yield corresponding fertilizer application amount derivation formula adopted when the first half of the growth is illuminated is a formula using the value of NDVI, and is adopted when the first half of the growth is abundant. The formula for deriving the amount of fertilizer applied at the time of multiple lighting corresponding to the target yield is a formula using the value of SPAD. This has the following effects for the following reasons.

That is, in general, when the first half of the growth is bright, the growth becomes poor and the leaf area becomes small, so that the leaf color becomes darker (the nitrogen concentration becomes higher). In such a case, since the leaf area is the limiting factor for photosynthesis, it is expected that the relationship between the NDVI affected by the leaf area and the yield of the crop will be strong. Therefore, when the first half of growth is bright, it is appropriate to use the formula to derive the fertilizer application amount at the time of topdressing based on the value of NDVI, which is strongly related to the yield of crops, and by using such a formula, it is appropriate. Expected to improve accuracy. It is clear from the following investigation by the inventors that the NDVI value and the amount of fertilizer applied at the time of topdressing are important factors for changing (especially increasing) the yield of crops when the first half of growth is lit. It was done. That is, the inventors used various combinations of NDVI values, SPAD values, and other index values of crop-related indicators (combinations containing only one index value) for cases where the first half of growth was lit. (Including) and the amount of fertilizer applied at the time of topdressing are used as explanatory variables, and multiple regression analysis is performed with yield as the objective variable. I investigated whether it would be a factor. As a result, the inventors concluded that the value of NDVI and the amount of fertilizer applied at the time of topdressing are important factors for changing (especially increasing) the yield of crops when the first half of growth is lit. That is, when the first half of the growth period is illuminating, the accuracy of the output value of the formula for deriving the fertilizer application amount during illuminating is high (= the validity of the equation itself is high). Is a matter confirmed by research and experiments by the inventors.

Here, in the present embodiment, the formula for deriving the fertilizer application amount at the time of lighting corresponding to the target yield is an equation showing the relationship between the target yield, the value of NDVI, and the fertilizer application amount at the time of topdressing. In this regard, the value of NDVI may be replaced with another "value of vegetation index measured for a group of crops". This is because it is assumed that the relationship between the "value of the vegetation index measured for the group of crops" and the yield of the crops becomes stronger when the first half of the growth period is lit up, and the same logic as in the case of NDVI holds. Furthermore, in the formula for deriving the amount of fertilizer applied during illumination corresponding to the target yield, along with the NDVI value (or the value of the vegetation index measured for the group of crops other than NDVI), the other crop index value (the vegetation index measured for the group of crops). (Not limited to the value of) may be included as a parameter. That is, the formula for deriving the amount of fertilizer applied at the time of lighting corresponding to the target yield may include the value of NDVI (or the value of the vegetation index measured for a group of crops other than NDVI) as one of the parameters. If the NDVI value (or the value of the vegetation index measured for a group of crops other than NDVI) is included as one of the parameters in the fertilizer application amount derivation formula corresponding to the target yield, improvement in accuracy can be expected. Is.

In the above case, the fertilizer application amount derivation formula (second crop-related value derivation formula) corresponding to the target yield is measured, for example, with respect to the past actual crop yield when the amount of solar radiation was light and the crop group. Regarding the relationship between the value of one or more indicators including at least the vegetation index and the amount of fertilizer applied at the time of topdressing, one or more indicators including at least the vegetation index measured for the group of crops with the yield of the crop as the objective variable. It is derived by multiple regression analysis using the value of and the amount of fertilizer applied at the time of top dressing as explanatory variables.

On the other hand, in general, when the first half of the growth period is high, the crop (rice) grows well and the leaf area becomes large, but the leaf color becomes lighter (the nitrogen concentration becomes lower) due to the influence. In such a case, it is assumed that the relationship between the SPAD value and the yield of the crop becomes stronger because the leaf color is the limiting factor of photosynthesis. Therefore, when the first half of the growth period is high, it is appropriate to use the formula to derive the fertilizer application amount at the time of topdressing based on the value of SPAD, which is strongly related to the yield of crops, and use such a formula. It can be expected that the accuracy will be improved. When the first half of growth is high, the SPAD value and the amount of fertilizer applied during topdressing are important factors for changing (especially increasing) the yield of crops in the case of high light in the first half of growth. Multiple regression analysis with various combinations of index values of indicators related to crops (including those containing only one index value in the combination) and the amount of fertilizer applied at the time of topdressing as explanatory variables and yield as the objective variable It was done by the inventors and clarified based on the results. That is, when the first half of the growth is multi-illuminated, the accuracy of the output value of the formula for deriving the fertilizer application amount during multi-illumination corresponding to the target yield using the SPAD value and the fertilizer application amount at the time of topdressing is high (= the validity of the formula itself is high). ) Is a matter confirmed by research and experiments by the inventors.

Here, in the present embodiment, the fertilizer application amount derivation formula corresponding to the target yield was a formula showing the relationship between the target yield, the SPAD value, and the fertilizer application amount at the time of topdressing. In this regard, the SPAD value may be replaced with another "value of the index for chlorophyll measured for the leaves of the crop". This is because it is assumed that the relationship between the "value of the index for chlorophyll measured for the leaves of the crop" and the yield of the crop becomes stronger when the first half of the growth period is high, and the same logic as for SPAD holds. Furthermore, in the formula for deriving the amount of fertilizer applied during multiple lighting corresponding to the target yield, the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) and the index value of other crops (measured for the leaves of crops) were measured. (Not limited to the value of the index related to chlorophyll) may be included as a parameter. That is, the formula for deriving the fertilizer application amount at the time of multiple lighting corresponding to the target yield may include the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters. If the SPAD value (or the value of the index value for chlorophyll measured for leaves of crops other than SPAD) is included as one of the parameters in the fertilizer application amount derivation formula corresponding to the target yield, improvement in accuracy is expected. Because it can be done.

In the above case, the fertilizer application amount derivation formula (first crop-related value derivation formula) corresponding to the target yield is, for example, about the past actual crop yield when the amount of solar radiation was high and the leaves of the crop. Regarding the relationship between the value of one or more indicators including at least the measured index for chlorophyll and the amount of fertilizer applied at the time of topdressing, the yield of the crop is used as the objective variable, and at least the index for the chlorophyll measured for the leaves of the crop is included. It is derived by multiple regression analysis using the values of one or more indicators and the amount of fertilizer applied at the time of top dressing as explanatory variables.

<In the case of target low appearance quality ratio>
Next, the processing of the crop-related value derivation unit 10 when the target state of the crop input to the input screen G1 is the target low appearance quality ratio will be described. When the target state is the target low appearance quality ratio and the first half of the growth of this period is multi-illuminated, the crop-related value derivation unit 10 acquires the SPAD information about the target field from the storage unit 11 and acquires it. The target SPAD is acquired based on the SPAD information. It should be noted that the crop-related value derivation unit 10 does not acquire the target SPAD or the target NDVI when the first half of the growth period of this period is bright (this point is different from the case where the target yield is input).

Next, the crop-related value derivation unit 10 uses a fertilizer application amount derivation formula (hereinafter referred to as "low-appearance system many") corresponding to the input target low-appearance quality ratio corresponding to the input target low-appearance quality ratio when the first half of the growing season is multi-illuminated. The formula used to derive the amount of fertilizer applied during top dressing is determined as the formula used to derive the fertilizer application rate. The low-appearance system multi-illumination derivation formula corresponds to the "third crop-related value derivation formula" in the claims. On the other hand, the crop-related value derivation unit 10 is a fertilizer application derivation formula at the time of illuminating, which corresponds to the input target low appearance quality ratio and corresponds to the input target low appearance quality ratio when the first half of the growth period of this period is illuminating. The derivation formula) is determined as the formula used to derive the amount of fertilizer applied during top dressing.

The low-appearance-based multi-illumination derivation formula corresponding to a certain target low-appearance quality ratio is the value of SPAD at the measurement timing when the low-appearance quality ratio is set to the target low-appearance quality ratio when the first half of growth is multi-illumination. It is a formula showing the relationship between (not the value of NDVI) and the amount of fertilizer applied at the time of top dressing, and is prepared for each selectable target low appearance quality ratio. The low-appearance-based multi-illumination derivation formula is a formula showing the relationship between the target ratio (low-appearance quality ratio) of the crop of low-appearance quality, the value of SPAD, and the amount of fertilizer applied at the time of topdressing. According to the low-appearance-based multi-illumination derivation formula corresponding to a certain target low-appearance quality ratio, when the first half of growth is multi-illumination and the value of SPAD at the measurement timing is the target SPAD, the low-appearance quality ratio is determined. It becomes clear how much fertilizer should be applied at the time of topdressing in order to achieve the target low appearance quality ratio. The low-appearance-based multi-illumination derivation formula uses the low-appearance quality ratio as the objective variable for the relationship between the actual low-appearance quality ratio in the past, the SPAD value, and the amount of fertilizer applied during topdressing. It is derived by multiple regression analysis using the amount of fertilizer applied as an explanatory variable.

On the other hand, the low-appearance-based illuminating derivation formula corresponding to a certain target low-appearance quality ratio sets the amount of fertilizer applied at the time of topdressing when the low-appearance quality ratio is set to the target low-appearance quality ratio when the first half of growth is illuminating. This formula defines the relationship between the target low appearance quality ratio and the amount of fertilizer applied at the time of top dressing. For example, if the target low appearance quality ratio is expressed by Q, the low appearance system derivation formula corresponding to Q is "Q = dN + e" (however, d and e are constants, and N is the amount of fertilizer applied during topdressing). expressed. According to the low-appearance-based illuminating derivation formula corresponding to a certain target low-appearance quality ratio, when the first half of growth is illuminating, the amount of fertilizer applied at the time of topdressing in order to set the low-appearance quality ratio to the target low-appearance quality ratio. It becomes clear how much should be. The low-appearance system derivation formula at the time of illumination is a multiple regression analysis with the low-appearance quality ratio as the objective variable and the fertilizer application amount at the time of topdressing as the explanatory variable for the relationship between the actual low-appearance quality ratio in the past and the amount of fertilizer applied at the time of topdressing. Derived by.

After determining the formula used for deriving the fertilizer application amount at the time of topdressing, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing using the determined formula. Next, the crop-related value derivation unit 10 displays the derived information indicating the amount of fertilizer applied at the time of top dressing in the display area of the display device 2.

As described above, when the target low-appearance quality ratio is input, the crop-related value derivation unit 10 adopts the low-appearance-based multi-illumination derivation formula when the first half of the growth period is multi-illumination, and the low-appearance is low when the first half of growth is high-illumination. The formula is changed according to the amount of solar radiation in the first half of the growth period, such as adopting the derivation formula at the time of system lighting, to derive the fertilizer application amount at the time of top dressing. In this way, the amount of fertilizer applied is derived by a method that reflects the amount of solar radiation in the first half of the growth of the crop (rice), so it is possible to derive the amount of fertilizer applied at the time of topdressing with higher accuracy.

Furthermore, when the first half of the growth period is high, the crop-related value derivation unit 10 uses a low-appearance high-light derivation formula that defines the relationship between the SPAD value and the fertilizer application rate at the time of topdressing for each target low-appearance quality ratio. Derive the amount of fertilizer applied at the time of top dressing. This is because when the first half of the growth period is high, the relationship between the SPAD value and the low appearance quality ratio becomes stronger as in the case of the target yield. Therefore, when the first half of the growth period is high, it is appropriate to use the formula to derive the fertilizer application amount at the time of top dressing based on the value of SPAD, which is strongly related to the low appearance quality ratio, and such a formula is used. This can be expected to improve accuracy. It should be noted that the fact that the SPAD value and the amount of fertilizer applied during topdressing are important factors for changing the low appearance quality ratio when the first half of growth is high is related to agricultural products in the case of high light in the first half of growth. Invented multiple regression analysis with various combinations of index values (including those containing only one index value) and the amount of fertilizer applied at the time of topdressing as explanatory variables and low appearance quality ratio as the objective variable. It was done by the people and clarified based on the result. That is, when the first half of growth is multi-illuminated, the accuracy of the output value of the low-appearance multi-illuminated derivation formula that uses the SPAD value and the amount of fertilizer applied at the time of topdressing as parameters is high (= the validity of the formula itself is high). Is a matter confirmed by research and experiments by the inventors.

Here, in the present embodiment, the low-appearance system multi-illumination derivation formula is a formula showing the relationship between the target low-appearance quality ratio, the SPAD value, and the fertilizer application amount at the time of top dressing. In this regard, the SPAD value may be replaced with another "value of the index for chlorophyll measured for the leaves of the crop". This is because it is assumed that the relationship between the "value of the index for chlorophyll measured for the leaves of crops" and the low appearance quality ratio becomes stronger when the first half of the growth period is high, and the same logic as for SPAD holds. Furthermore, in the low-appearance multi-illumination derivation formula, along with the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD), the index value of other crops (for the chlorophyll measured for the leaves of the crop). (Not limited to the value of the index) may be included as a parameter. That is, the low-appearance-based multi-illumination derivation formula may include the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters. If the low-appearance multi-illumination derivation formula includes the SPAD value (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters, improvement in accuracy can be expected. Is.

In the above case, the low-appearance system multi-illumination derivation formula (third crop-related value derivation formula) measures, for example, the actual low-appearance quality ratio in the past when the amount of solar radiation was high and the leaves of the crop. Regarding the relationship between the value of one or more indicators including at least the index related to the chlorophyll that was obtained and the amount of fertilizer applied at the time of topdressing, the low appearance quality ratio was used as the objective variable, and at least the index related to the chlorophyll measured for the leaves of the crop was included. It is derived by multiple regression analysis using the values of one or more indicators and the amount of fertilizer applied at the time of top dressing as explanatory variables.

On the other hand, when the first half of the growth period is lit, the crop-related value derivation unit 10 defines the relationship between the target low appearance quality ratio and the fertilizer application amount at the time of topdressing for each target low appearance quality ratio. Is used to derive the amount of fertilizer applied at the time of top dressing. This is because the following matters were found in the research of the inventors.

That is, when the first half of growth is lit up, the "correlation between the SPAD value and the low appearance quality ratio" and the "NDVI value and the low appearance quality ratio" when the low appearance quality ratio is set as the target low appearance quality ratio Regarding "correlation", either one is not particularly strong, and "formula derived based on the relationship between the past SPAD value, the amount of fertilizer applied at the time of top dressing, and the low appearance quality ratio" and "the past NDVI" Either "the formula derived based on the relationship between the value, the amount of fertilizer applied at the time of top dressing and the low appearance quality ratio", or "the formula derived based on the relationship between the amount of fertilizer applied at the time of top dressing in the past and the low appearance quality ratio". This is because it was found that there is no definite difference in the accuracy of the derived fertilizer application amount even when the fertilizer application amount at the time of topdressing is derived using the above formula.

When the target low appearance quality ratio is input, the amount of fertilizer applied at the time of topdressing is calculated using a formula in which the SPAD value, NDVI value, and other crop index values are not used as parameters when the first half of growth is lit. When the first half of growth is lit, the SPAD value (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) is used as one of the parameters, as in the case of multi-illumination. The idea is not to always use an expression that includes it. Therefore, when the target low appearance quality ratio is input, when the first half of the growth period is lit, the crop-related value derivation unit 10 uses the SPAD value, NDVI value, and other crop index values as parameters. It may be configured to derive the amount of fertilizer applied at the time of top dressing by using it. In the case of this configuration, the crop-related value derivation unit 10 acquires the necessary crop index value when deriving the fertilizer application amount at the time of topdressing.

<In the case of target protein content>
Next, the processing of the crop-related value derivation unit 10 when the target state of the crop input to the input screen G1 is the target protein content will be described. When the target state was the target protein content and the first half of the growth period of this period was multi-illuminated, the crop-related value derivation unit 10 acquired the SPAD information about the target field from the storage unit 11 and acquired it. Acquire the target SPAD based on the SPAD information. It should be noted that the crop-related value derivation unit 10 does not acquire the target SPAD or the target NDVI when the first half of the growth period of this period is bright (this point is different from the case where the target yield is input).

Next, the crop-related value derivation unit 10 describes the fertilizer application amount derivation formula for the target protein content corresponding to the input target protein content (hereinafter referred to as “protein-based multi-lighting derivation”) when the first half of the growth period of this term is multi-illuminated. The formula ") is determined as the formula used to derive the amount of fertilizer applied at the time of top dressing. The protein-based multi-illumination derivation formula corresponds to the "fourth crop-related value derivation formula" in the claims. On the other hand, when the first half of the growth period of this term is lit up, the crop-related value deriving unit 10 is a formula for deriving the amount of fertilizer applied at the time of illuminating corresponding to the target protein content corresponding to the input target protein content (hereinafter, "protein-based deriving formula at the time of illuminating"). ) Is determined as the formula used to derive the amount of fertilizer applied during top dressing.

The protein-based multi-illumination derivation formula corresponding to a certain target protein content is the SPAD value (NDVI value) at the measurement timing when the protein content is set to the target protein content in the case of multi-illumination in the first half of growth. It is an equation showing the relationship between (not) and the amount of fertilizer applied at the time of top dressing, and is prepared for each selectable target protein content. The protein-based multi-illumination derivation formula is a formula that defines the relationship between the protein content, the SPAD value, and the amount of fertilizer applied during topdressing. According to the protein-based multi-illumination derivation formula corresponding to a certain target protein content, when the first half of growth is multi-illumination and the value of SPAD at the measurement timing is the target SPAD, the protein content is the target protein content. In order to obtain the rate, it becomes clear how much fertilizer should be applied at the time of top dressing. The protein-based multi-illumination derivation formula uses the protein content as the objective variable for the relationship between the actual protein content in the past, the SPAD value, and the fertilizer application rate at the time of top dressing, and the SPAD value and the fertilizer application rate at the time of top dressing. Is derived by multiple regression analysis with.

On the other hand, the protein-based illuminating derivation formula corresponding to a certain target protein content is a formula indicating the amount of fertilizer applied at the time of topdressing when the protein content is set to the target protein content when the first half of growth is illuminating. .. For example, if the target protein content is represented by T, the protein-based lighting derivation formula corresponding to T is represented by a formula such as "T = fN + g" (where f and g are constants and N is the amount of fertilizer applied during topdressing). To. According to the protein-based illuminating derivation formula corresponding to a certain target protein content, when the first half of growth is illuminating, how much fertilizer is applied at the time of topdressing in order to set the protein content as the target protein content. It turns out what to do. The protein-based lighting derivation formula is derived by multiple regression analysis with the protein content as the objective variable and the fertilizer application rate during top dressing as the explanatory variable for the relationship between the actual protein content in the past and the fertilizer application rate during top dressing. To.

After determining the formula used for deriving the fertilizer application amount at the time of top dressing, the crop-related value derivation unit 10 derives the fertilizer application rate at the time of top dressing using the determined formula. Next, the crop-related value derivation unit 10 displays the derived information indicating the amount of fertilizer applied at the time of top dressing in the display area of the display device 2.

As described above, when the target protein content is input, the crop-related value derivation unit 10 adopts the protein-based multi-illumination derivation formula when the first half of the growth period is multi-illumination, and the protein-based multi-illumination derivation formula when the first half of growth is high-illumination. By adopting the derivation formula, the formula is changed according to the amount of solar radiation in the first half of the growth period to derive the fertilizer application amount at the time of top dressing. In this way, the amount of fertilizer applied is derived by a method that reflects the amount of solar radiation in the first half of the growth of the crop (rice), so it is possible to derive the amount of fertilizer applied at the time of topdressing with higher accuracy.

Furthermore, when the first half of the growth period is high, the crop-related value derivation unit 10 uses a protein-based high-lighting derivation formula that defines the relationship between the SPAD value and the amount of fertilizer applied at the time of topdressing for each target protein content. Derive the amount of fertilizer applied. This is because when the first half of the growth period is high, the relationship between the SPAD value and the protein content becomes stronger as in the case of the target yield. Therefore, when the first half of the growth period is high, it is appropriate to use the formula to derive the fertilizer application amount at the time of top dressing based on the value of SPAD, which is strongly related to the protein content, and use such a formula. It can be expected that the accuracy will be improved. It should be noted that the SPAD value and the amount of fertilizer applied at the time of topdressing are important factors for changing the protein content when the first half of growth is high, which is an index related to crops in the case of high light in the first half of growth. The inventors have conducted multiple regression analysis using various combinations of index values (including those containing only one index value) and the amount of fertilizer applied at the time of topdressing as explanatory variables, and protein content as the objective variable. It was done by and was clarified based on the result. In other words, when the first half of growth is multi-illuminated, the accuracy of the output value of the protein-based multi-illuminated derivation formula that uses the SPAD value and the amount of fertilizer applied during topdressing as parameters is high (= the formula itself is highly valid). , It is a matter confirmed by research and experiment by the inventors.

Here, in the present embodiment, the protein-based multi-illumination derivation formula is a formula showing the relationship between the target protein content, the SPAD value, and the fertilizer application amount at the time of top dressing. In this regard, the SPAD value may be replaced with another "value of the index for chlorophyll measured for the leaves of the crop". This is because it is assumed that the relationship between the "value of the index for chlorophyll measured for the leaves of crops" and the protein content becomes stronger when the first half of the growth period is high, and the same logic as for SPAD holds. Furthermore, in the protein-based multi-illumination derivation formula, along with the value of SPAD (or the value of the index related to chlorophyll measured for the leaves of crops other than SPAD), the index value of other crops (the index related to chlorophyll measured for the leaves of the crop). (Not limited to the value of) may be included as a parameter. That is, the protein-based multi-illumination derivation formula may include the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters. If the protein-based multi-illumination derivation formula includes the SPAD value (or the value of the index for chlorophyll measured for leaves of crops other than SPAD) as one of the parameters, improvement in accuracy can be expected. be.

In the above case, the protein-based multi-illumination derivation formula (fourth crop-related value derivation formula) was measured, for example, for the actual protein content in the past when the amount of solar radiation was high and the leaves of the crop. Regarding the relationship between the value of one or more indicators including at least an index related to chlorophyll and the amount of fertilizer applied at the time of topdressing, one or more indicators containing at least the index related to chlorophyll measured for the leaves of crops with the protein content as the objective variable. It is derived by multiple regression analysis using the index value and the amount of fertilizer applied at the time of top dressing as explanatory variables.

On the other hand, when the first half of growth is lit, the crop-related value deriving unit 10 defines the amount of fertilizer applied at the time of topdressing to set the protein content as the target protein content for each target protein content. The amount of fertilizer applied at the time of topdressing is derived using the formula. This is because the following matters were found in the research of the inventors.

That is, when the first half of growth is lit up, "correlation between SPAD value and protein content" and "correlation between NDVI value and protein content" when the protein content is the target protein content. Regarding, either one is not particularly strong, "a formula derived based on the relationship between the past SPAD value, the amount of fertilizer applied at the time of top dressing, and the protein content", and "the value of the past NDVI and the fertilizer applied at the time of top dressing". "Equation derived based on the relationship between the amount and protein content" and "Equation derived based on the relationship between the amount of fertilizer applied in the past and the protein content" This is because it was found that there is no definite difference in the accuracy of the derived fertilizer application amount even when the fertilizer application amount is derived.

When the target protein content is input, the amount of fertilizer applied at the time of topdressing is derived using an equation in which the SPAD value, NDVI value, and other crop index values are not used as parameters when the first half of growth is lit. When the first half of growth is lit, the "SPAD value (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) is always one of the parameters, as in the case of multi-illumination. The idea is not to use an expression that includes. Therefore, when the target protein content is input and the first half of the growth period is lit up, the crop-related value derivation unit 10 uses the SPAD value, NDVI value, and other crop index values as parameters. It may be configured to derive the amount of fertilizer applied at the time of top dressing by using it. In the case of this configuration, the crop-related value derivation unit 10 acquires the necessary crop index value when deriving the fertilizer application amount at the time of topdressing.

Next, a method for deriving the amount of fertilizer applied by the crop-related value deriving device 1 according to the present embodiment will be described using a flowchart. FIG. 4 is a flowchart showing an operation example of the main operation of the crop-related value derivation device 1. As shown in FIG. 4, the crop-related value derivation unit 10 of the crop-related value derivation device 1 determines the state of predetermined meteorological conditions in the first half of the growth of the crop (step SA1). Next, the crop-related value derivation unit 10 derives the crop-related value by a method that reflects the conditions of predetermined weather conditions in the first half of the growth of the crop (step SA2).

FIG. 5 is a flowchart showing the operation of the crop-related value derivation device 1 in more detail. As shown in FIG. 5, the user instructs to display the input screen G1 (see FIG. 2) (step SX1). In response to the instruction in step SX1, the crop-related value derivation unit 10 of the crop-related value derivation device 1 displays the input screen G1 on the display device 2 (step SB1). The user inputs any one of the target yield, the target low appearance quality ratio, and the target protein content rate on the input screen G1 and confirms the input (step SX2). When it is detected that the input is confirmed, the crop-related value derivation unit 10 of the crop-related value derivation device 1 acquires the insolation amount information in the first half of the growth period stored in the storage unit 11, and based on the information, the first half of the growth period of the current period. The amount of solar radiation (lighting or lighting) is determined (step SB2).

Further, the crop-related value derivation unit 10 determines whether or not the input target state of the crop is the target yield (step SB3). When the target yield is reached (step SB3: YES), the crop-related value deriving unit 10 determines whether the first half of the growing season was multi-illuminated or lit-lit (step SB4). In the case of a light (step SB4: "light"), the crop-related value derivation unit 10 acquires the NDVI information stored in the storage unit 11 and acquires the target NDVI based on the information (step SB5). Next, the crop-related value derivation unit 10 determines the formula for deriving the fertilizer application amount at the time of topdressing as the formula used for deriving the fertilizer application amount at the time of topdressing because the first half of the growth period of this term is illuminating (step SB6). Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing by inputting the target NDVI acquired in step SB5 into the target yield-corresponding fertilizer amount derivation formula corresponding to the input target yield (step SB7). After step SB7, the processing procedure shifts to step SB24.

When the first half of the growth of this term is multi-illuminated in step SB4 (step SB4: “multi-illuminated”), the crop-related value derivation unit 10 acquires the SPAD information stored in the storage unit 11 and is based on the information. And acquire the target SPAD (step SB8). Next, the crop-related value derivation unit 10 determines the formula for deriving the fertilizer application amount at the time of topdressing as the formula used for deriving the fertilizer application amount at the time of topdressing because the first half of the growth period of this term is multi-illumination (step SB9). Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing by inputting the target SPAD acquired in step SB8 into the fertilizer application amount derivation formula at the time of multiple illumination corresponding to the input target yield (step SB10). After step SB10, the processing procedure shifts to step SB24.

When the target state of the crop input in step SB3 is not the target yield (step SB3: NO), the crop-related value derivation unit 10 determines whether or not the target state of the input crop was the target low appearance quality ratio. Determine (step SB11). When the target low appearance quality ratio is obtained (step SB11: YES), the crop-related value deriving unit 10 determines whether the first half of the growing season was multi-illuminated or lit-lit (step SB12). In the case of illuminating (step SB12: "illumination"), the crop-related value deriving unit 10 determines the low-appearance-based illuminating derivation formula as an equation used for deriving the fertilizer application amount at the time of topdressing (step SB13). Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of top dressing by using the low-appearance-based lighting derivation formula corresponding to the input target low-appearance quality ratio (step SB14). After step SB14, the processing procedure shifts to step SB24.

When the first half of the growth of this period is multi-illuminated in step SB12 (step SB12: “multi-illuminated”), the crop-related value derivation unit 10 acquires the SPAD information stored in the storage unit 11 and is based on the information. And acquire the target SPAD (step SB15). Next, the crop-related value derivation unit 10 determines the low-appearance system multi-illumination derivation formula as an equation to be used for deriving the fertilizer application amount at the time of topdressing because the first half of the growing season is multi-illumination (step SB16). Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing by inputting the target SPAD acquired in step SB15 into the low-appearance system multi-illumination derivation formula corresponding to the input target low-appearance quality ratio (step). SB17). After step SB17, the processing procedure shifts to step SB24.

When the target state of the crop input in step SB11 is not the target low appearance quality ratio (step SB11: NO), it means that the target protein content is input. In this case, the crop-related value derivation unit 10 determines whether the first half of the growing season was multi-illuminated or lit-lit (step SB18). In the case of illuminating (step SB18: "illumination"), the crop-related value deriving unit 10 determines the protein-based illuminating derivation formula as an equation used for deriving the fertilizer application amount during topdressing (step SB19). Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of top dressing by using the protein-based lighting derivation formula corresponding to the input target protein content (step SB20). After step SB20, the processing procedure shifts to step SB24.

When the first half of the growth of this period is multi-illuminated in step SB18 (step SB18: “multi-illuminated”), the crop-related value derivation unit 10 acquires the SPAD information stored in the storage unit 11 and is based on the information. And acquire the target SPAD (step SB21). Next, the crop-related value derivation unit 10 determines the protein-based multi-illumination derivation formula as an equation used for deriving the fertilizer application amount at the time of topdressing because the first half of the growth period of this term is multi-illumination (step SB22). Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing by inputting the target SPAD acquired in step SB21 into the protein-based multi-illumination derivation formula corresponding to the input target protein content (step SB23). .. After step SB23, the processing procedure shifts to step SB24.

In step SB24, the crop-related value derivation unit 10 controls the display device 2 to display the derived information indicating the fertilizer application amount at the time of top dressing in the display area of the display device 2.

<First modification>
Next, a first modification of the above embodiment will be described. In the above embodiment, a plurality of fertilizer application amount derivation formulas (crop-related value derivation formulas) are prepared according to the amount of solar radiation in the first half of the growth of the crop (rice), and the crop-related value derivation unit 10 is used in this term (target). The amount of fertilizer applied at the time of topdressing was derived using the formula for deriving the amount of fertilizer applied corresponding to the amount of solar radiation in the first half of the growth period of the crops. In this regard, the crop-related value derivation device 1 according to this modification executes the following processing.

That is, as shown in FIG. 6, the information indicating the amount of solar radiation in the first half of the growth of the crop (rice), the NDVI value at the measurement timing, and the SPAD value at the measurement timing are input, and the fertilizer application amount at the time of topdressing is input. A model to output is prepared for each target state of the crop. In this example, the "NDVI value at the measurement timing" and the "SPAD value at the measurement timing" correspond to the "crop index value which is the value of the index related to the growth of the crop at a predetermined timing" in the claims, respectively. The information indicating the amount of solar radiation is either a value indicating the amount of solar radiation or a value indicating the amount of solar radiation when the amount of solar radiation is represented by either the multi-illumination or the e-lighting as in the above embodiment. It is said that. In addition, the information indicating the amount of solar radiation may be a value that quantitatively represents the amount of solar radiation in the first half of the growth period. The information entered into the model is normalized or standardized by appropriate means using statistical methods. The model targets crops based on input by learning data showing the relationship between the amount of actual solar radiation in the past, the NDVI value at the measurement timing, the SPAD value at the measurement timing, and the fertilizer application amount at the time of topdressing. It is a trained model from the viewpoint of outputting the amount of fertilizer applied at the time of topdressing to make it into a state.

Then, the crop-related value derivation unit 10 identifies a model corresponding to the target state, and gives the identified model information indicating the amount of solar radiation in the first half of growth, the NDVI value at the measurement timing, and the SPAD value at the measurement timing. Enter and use the output value as the amount of fertilizer applied at the time of top dressing. The research results of the inventors that the amount of fertilizer applied at the time of topdressing can be derived using the above model, and the accuracy can be improved by deriving the amount of fertilizer applied by reflecting the amount of solar radiation in the first half of the growth of the crop. Can be suitably used to derive a highly accurate fertilizer application amount at the time of top dressing.

In this modification, a model is prepared for each selectable target state, but one model including the target state as an input may be prepared. Further, in this modification, the crop-related value derivation unit 10 used a model in which the NDVI value and the SPAD value were input as the index values related to the growth of the crop, but the amount of solar radiation in the first half of the growth and the target state were used. The type of crop index value input for each type may be different. For example, when the type of target state is the target yield, a model in which only the NDVI value is input when the first half of the growth period is bright, and in the case of multiple lighting, only the SPAD value is input. It may be configured to use (of course, such a model is prepared). Further, in addition to the NDVI value and the SPAD value, or in place of at least one of these, the value of another index may be input (a configuration in which such a model is prepared).

<Second modification>
Next, a second modification of the above embodiment will be described. In the above embodiment, the crop-related value derivation unit 10 derives the amount of fertilizer applied at the time of topdressing by a method that reflects the amount of solar radiation in the first half of the growth of rice. That is, in the above embodiment, the amount of solar radiation corresponds to the "condition of predetermined weather conditions" in the claims. In this regard, the conditions of predetermined meteorological conditions in the first half of growth, which are taken into consideration when deriving the amount of fertilizer applied at the time of topdressing, are not limited to the amount of solar radiation. That is, the "condition of predetermined meteorological conditions in the first half of growth", which is added when deriving the amount of fertilizer applied at the time of topdressing, is derived by deriving the amount of fertilizer applied at the time of topdressing in consideration of the situation. Anything that can improve the accuracy of the quantity will do.

Then, the inventors have found through research that the accuracy of the derived fertilizer application amount can be improved by deriving the fertilizer application amount by reflecting the temperature in the first half of the growth period. This is because the high and low temperatures naturally have a strong correlation with the amount of solar radiation, and when the amount of solar radiation is large, the temperature is high, and when the amount of solar radiation is low, the temperature is low. It is assumed that it comes from the same reason as stated. That is, when the first half of the growth is low temperature, the leaf area (vegetation coverage) becomes smaller and the leaf color becomes darker as in the case of the first half of the growth when the light is lit. The area (vegetation coverage) increases and the leaf color becomes lighter. Therefore, regarding the condition of crops, it is expected that the high and low temperatures in the first half of growth have the same effect as the amount of solar radiation in the first half of growth. Based on the above items, the crop-related value derivation device 1 according to this modification executes the following processing.

When the crop-related value derivation unit 10 according to this modification detects that the input to the input screen G1 is confirmed, the following processing is executed. That is, the crop-related value derivation unit 10 determines whether the temperature is high or low in the first half of the growth period. In the present embodiment, the high and low temperatures in the first half of growth mean whether or not the average temperature in the first half of growth in the area including the field exceeds a predetermined reference value (threshold value). In the following explanation, when the average temperature is above the standard value, it is called "high temperature", and when it is below the standard value, it is called "low temperature". Similar to the above embodiment, the crop-related value derivation unit 10 determines whether the temperature in the first half of the growth period is high or low based on the information stored in the storage unit 11 (hereinafter referred to as “first half of growth temperature information”).

First half of growth temperature information is generated in advance based on, for example, information on temperature published by the Japan Meteorological Agency, local governments and other organizations and groups, and observation results by field managers (concepts including organizations and groups). .. The definition of high and low temperatures in the first half of growth in this variant is just an example. Other examples of how to define high and low temperatures in the first half of growth will be described later.

The crop-related value derivation unit 10 executes the following processing when the target state of the crop input to the input screen G1 is the target yield. That is, when the temperature in the first half of the growth period is low, the crop-related value derivation unit 10 acquires the target NDVI based on the information stored in the storage unit 11. On the other hand, when the temperature in the first half of the growth period is high, the crop-related value derivation unit 10 acquires the target SPAD based on the information stored in the storage unit 11.

Next, when the first half of the growth period of this term is low temperature, the crop-related value derivation unit 10 uses the fertilizer application amount derivation formula (second crop-related value derivation formula) corresponding to the target yield corresponding to the input target yield at the time of topdressing. It is determined as an expression used for deriving. On the other hand, when the first half of the growth period of this term is high temperature, the crop-related value derivation unit 10 applies the fertilizer application amount derivation formula (first crop-related value derivation formula) corresponding to the target yield corresponding to the input target yield at the time of topdressing. Determined as the formula used to derive the quantity.

The formula for deriving the amount of fertilizer applied at low temperature corresponding to a certain target yield is the NDVI value at the measurement timing when the yield of the crop is set as the target yield when the first half of the growing season is low, and the value at the time of topdressing. It is an equation showing the relationship with the amount of fertilizer applied. The formula for deriving the amount of fertilizer applied at low temperature corresponding to the target yield is derived in advance for each selectable target yield (candidate target yield). The formula for deriving the amount of fertilizer applied at low temperature corresponding to each target yield is the relationship between the actual amount of fertilizer applied at the time of topdressing in the past when the temperature was low in the first half of growth, the NDVI value at the measurement timing, and the yield of crops. , It is obtained by multiple regression analysis with the yield of crops as the objective variable and the NDVI value at the time of topdressing and the measurement timing as the explanatory variables. The reason why the target yield-corresponding low-temperature fertilizer application amount derivation formula includes the NDVI value in the variable is the same as the reason why the target yield-corresponding low-temperature fertilizer application amount derivation formula includes the NDVI value in the variable.

In addition, the fertilizer application amount derivation formula at high temperature corresponding to a certain target yield is the SPAD value at the measurement timing when the yield of the crop is set to the target yield when the first half of the growth is high temperature, and topdressing. It is an equation showing the relationship with the amount of fertilizer applied at the time. Corresponding to the target yield The formula for deriving the amount of fertilizer applied at high temperature is derived in advance for each selectable target yield (candidate target yield). The formula for deriving the amount of fertilizer applied at high temperature corresponding to each target yield is the relationship between the actual amount of fertilizer applied during topdressing in the past when the temperature was high in the first half of growth, the SPAD value at the measurement timing, and the yield of crops. , It is obtained by multiple regression analysis with the yield of crops as the objective variable and the value of SPAD at the time of top dressing and the measurement timing as the explanatory variables. The reason why the formula for deriving the fertilizer application rate at high temperature corresponding to the target yield includes the value of SPAD in the variable is the same as the reason why the formula for deriving the fertilizer application rate at high temperature corresponding to the target yield includes the value of SPAD in the variable.

Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of top dressing based on the target NDVI (in the case of low temperature) or the target SPAD (in the case of high temperature) using the determined formula. Next, the crop-related value derivation unit 10 controls the display device 2 to display the derived information indicating the amount of fertilizer applied at the time of top dressing in the display area of the display device 2. By referring to the display device 2, the user can recognize the amount of fertilizer applied at the time of topdressing derived by the crop-related value derivation device 1 for the target field, and is a useful reference when determining the amount of fertilizer actually supplied at the time of topdressing. It can be used as information.

The formula for deriving the amount of fertilizer applied at low temperature corresponding to the target yield was a formula showing the relationship between the target yield, the value of NDVI, and the amount of fertilizer applied at the time of topdressing. It may be replaced with "value of vegetation index". Furthermore, in the formula for deriving the amount of fertilizer applied at low temperature corresponding to the target yield, along with the NDVI value (or the value of the vegetation index measured for the group of crops other than NDVI), the other crop index value (the vegetation index measured for the group of crops). (Not limited to the value of) may be included as a parameter. That is, the formula for deriving the amount of fertilizer applied at low temperature corresponding to the target yield may include the value of NDVI (or the value of the vegetation index measured for a group of crops other than NDVI) as one of the parameters.

In the above case, the fertilizer application amount derivation formula at low temperature corresponding to the target yield (second crop-related value derivation formula) was measured, for example, for the actual yield of past crops when the temperature was low and the group of crops. Regarding the relationship between the value of one or more indicators including at least the vegetation index and the amount of fertilizer applied at the time of topdressing, the yield of the crop is used as the objective variable, and the value of one or more indicators including at least the vegetation index measured for the group of crops. It is derived by multiple regression analysis using the value and the amount of fertilizer applied at the time of top dressing as explanatory variables.

The formula for deriving the amount of fertilizer applied at high temperature corresponding to the target yield was a formula showing the relationship between the target yield, the value of SPAD, and the amount of fertilizer applied at the time of topdressing. In this regard, the SPAD value may be replaced with another "value of the index for chlorophyll measured for the leaves of the crop". Furthermore, in the formula for deriving the amount of fertilizer applied at high temperature corresponding to the target yield, along with the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD), the index value of other crops (the value of the index for chlorophyll measured for the leaves of the crop). (Not limited to the value of the index related to) may be included as a parameter. That is, the formula for deriving the amount of fertilizer applied at high temperature corresponding to the target yield may include the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters.

In the above case, the formula for deriving the amount of fertilizer applied at high temperature corresponding to the target yield (first formula for deriving the value related to crops) is, for example, the actual yield of past crops when the temperature in the first half of growth was high and the leaves of crops. Regarding the relationship between the value of one or more indicators including at least the index related to chlorophyll measured in the It is derived by multiple regression analysis using the value of one or more indicators and the amount of fertilizer applied at the time of top dressing as explanatory variables.

Further, the crop-related value derivation unit 10 executes the following processing when the target state of the crop input to the input screen G1 is the target low appearance quality ratio. That is, when the temperature in the first half of the growth period is high, the crop-related value derivation unit 10 acquires the target SPAD based on the information stored in the storage unit 11. On the other hand, when the temperature in the first half of the growth period is low, the crop-related value derivation unit 10 does not acquire the target SPAD or the target NDVI.

Next, the crop-related value derivation unit 10 describes the fertilizer application amount derivation formula at low temperature corresponding to the input target low appearance quality ratio corresponding to the input target low appearance quality ratio when the first half of the growth period of this period is low temperature (hereinafter, “low appearance system low temperature derivation”). The formula ") is determined as the formula used to derive the amount of fertilizer applied during top dressing. On the other hand, when the first half of the growth period of this term is high temperature, the crop-related value derivation unit 10 is a fertilizer application amount derivation formula at high temperature corresponding to the input target low appearance quality ratio corresponding to the input target low appearance quality ratio (hereinafter, “low appearance system at high temperature”). The derivation formula) is determined as the formula used to derive the amount of fertilizer applied during top dressing. The low-appearance system high-temperature derivation formula corresponds to the "third crop-related value derivation formula" in the claims.

The low-appearance system low-temperature derivation formula corresponding to a certain target low-appearance quality ratio is the target low-appearance quality ratio when the low-appearance quality ratio is set as the target low-appearance quality ratio when the first half of growth is low temperature. It is a formula that defines the relationship with the amount of fertilizer applied at the time of top dressing. The low-appearance low-temperature derivation formula is derived in advance for each selectable target low-appearance quality ratio (candidate for the target low-appearance quality ratio).

On the other hand, the low-appearance system high-temperature derivation formula corresponding to a certain target low-appearance quality ratio is a target low-appearance quality when the low-appearance quality ratio is set to the target low-appearance quality ratio when the first half of growth is high temperature. It is an equation showing the relationship between the ratio, the value of SPAD at the measurement timing, and the amount of fertilizer applied at the time of top dressing. The low-appearance system high-temperature derivation formula is derived in advance for each selectable target low-appearance quality ratio (candidate for target low-appearance quality ratio). The low-appearance system high-temperature derivation formula corresponding to each target low-appearance quality ratio is the past actual fertilizer application amount at the time of topdressing when the first half of growth was high, the SPAD value at the measurement timing, and the low-appearance quality ratio. The relationship is obtained by multiple regression analysis with low appearance quality as the objective variable and the SPAD value at the time of topdressing and the measurement timing as the explanatory variables. The reason why the low-appearance system high-temperature derivation formula contains the value of SPAD in the variable is the same as the reason why the low-appearance system multi-illumination derivation formula includes the value of SPAD in the variable.

Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing using the determined formula. Next, the crop-related value derivation unit 10 controls the display device 2 to display the derived information indicating the amount of fertilizer applied at the time of top dressing in the display area of the display device 2.

The low-appearance system high-temperature derivation formula was a formula showing the relationship between the target low-appearance quality ratio, the SPAD value, and the amount of fertilizer applied during topdressing. In this regard, the SPAD value may be replaced with another "value of the index for chlorophyll measured for the leaves of the crop". Furthermore, in the low-appearance high-temperature derivation formula, along with the value of SPAD (or the value of the index related to chlorophyll measured for the leaves of crops other than SPAD), the index value of other crops (the index related to chlorophyll measured for the leaves of the crop). (Not limited to the value of) may be included as a parameter. That is, the low-appearance system high-temperature derivation formula may include the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters.

In the above case, the low appearance system high temperature derivation formula (third crop-related value derivation formula) is, for example, about the past actual low appearance quality ratio when the temperature in the first half of growth was high and the leaves of the crop. Regarding the relationship between the value of one or more indicators including at least the measured index for chlorophyll and the amount of fertilizer applied at the time of topdressing, the low appearance quality ratio is set as the objective variable, and at least the index for chlorophyll measured for the leaves of crops is included. It is derived by multiple regression analysis using the value of one or more indicators and the amount of fertilizer applied at the time of top dressing as explanatory variables.

In addition, the SPAD value, NDVI value, and other crop index values are not used as parameters in the low-appearance low-temperature derivation formula when the temperature in the first half of growth is low, as in the case of high temperature. The idea is not to use an expression that always includes the SPAD value (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters. Therefore, when the target protein content was input and the temperature in the first half of the growth period was low, the crop-related value derivation unit 10 used the SPAD value, NDVI value, and other crop index values as parameters. A configuration may be used in which the amount of fertilizer applied at the time of topdressing is derived using an equation. In the case of this configuration, the crop-related value derivation unit 10 acquires the necessary crop index value when deriving the fertilizer application amount at the time of topdressing.

Further, the crop-related value derivation unit 10 executes the following processing when the target state of the crop input to the input screen G1 is the target protein content. That is, when the temperature in the first half of the growth period is high, the crop-related value derivation unit 10 acquires the target SPAD based on the information stored in the storage unit 11. On the other hand, when the temperature in the first half of the growth period is low, the crop-related value derivation unit 10 does not acquire the target SPAD or the target NDVI.

Next, the crop-related value derivation unit 10 is referred to as a low-temperature fertilizer application derivation formula (hereinafter referred to as "protein-based low-temperature derivation formula") corresponding to the target protein content corresponding to the input target protein content when the first half of the growth period of this season is low temperature. ) Is determined as the formula used to derive the amount of fertilizer applied during top dressing. On the other hand, when the first half of the growth period of this term is high temperature, the crop-related value derivation unit 10 is a fertilizer application derivation formula at high temperature corresponding to the input target protein content (hereinafter, “protein-based high temperature derivation formula””. ) Is determined as the formula used to derive the amount of fertilizer applied during top dressing. The protein-based high-temperature derivation formula corresponds to the "fourth crop-related value derivation formula" in the claims.

The protein-based low-temperature derivation formula corresponding to a certain target protein content is the target protein content and the amount of fertilizer applied at the time of topdressing when the protein content is set as the target protein content when the first half of growth is low temperature. It is an expression that defines the relationship between. The protein-based low-temperature derivation formula is derived in advance for each selectable target protein content (candidate for target protein content).

On the other hand, the protein-based high-temperature derivation formula corresponding to a certain target protein content is the target protein content and the measurement timing when the protein content is set to the target protein content when the first half of growth is high temperature. It is a formula showing the relationship between the value of SPAD in the above and the amount of fertilizer applied at the time of top dressing. The protein-based high-temperature derivation formula is derived in advance for each selectable target protein content (candidate for target protein content). The protein-based high-temperature derivation formula corresponding to each target protein content describes the relationship between the actual amount of fertilizer applied during topdressing in the past when the temperature was high in the first half of growth, the SPAD value at the measurement timing, and the protein content. It is obtained by multiple regression analysis with the protein content as the objective variable and the SPAD value at the time of top dressing and the measurement timing as the explanatory variables. The reason why the protein-based high-temperature derivation formula contains the value of SPAD in the variable is the same as the reason why the protein-based multi-illumination derivation formula contains the value of SPAD in the variable.

Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing using the determined formula. Next, the crop-related value derivation unit 10 controls the display device 2 to display the derived information indicating the amount of fertilizer applied at the time of top dressing in the display area of the display device 2.

The protein-based high-temperature derivation formula was a formula showing the relationship between the protein content, the SPAD value, and the amount of fertilizer applied during topdressing. In this regard, the SPAD value may be replaced with another "value of the index for chlorophyll measured for the leaves of the crop". Furthermore, in the protein-based high-temperature derivation formula, along with the value of SPAD (or the value of the index related to chlorophyll measured for the leaves of crops other than SPAD), the index value of other crops (the value of the index related to chlorophyll measured for the leaves of the crop) (Not limited to the value) may be included as a parameter. That is, the protein-based high-temperature derivation formula may include the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters.

In the above case, the protein-based high-temperature derivation formula (fourth crop-related value derivation formula) is measured, for example, for the actual protein content in the past when the temperature in the first half of growth was high and the leaves of the crop. Regarding the relationship between the value of one or more indicators including at least the index related to chlorophyll and the amount of fertilizer applied at the time of topdressing, the protein content is used as the objective variable, and at least one index containing at least the index related to chlorophyll measured for the leaves of crops. It is derived by multiple regression analysis using the value of the index and the amount of fertilizer applied at the time of top dressing as explanatory variables.

In addition, the SPAD value, NDVI value, and other crop index values are not used as parameters in the protein-based low-temperature derivation formula when the temperature in the first half of growth is low, as in the case of high temperature. The purpose is not to use an expression that always includes the SPAD value (or the value of the index related to chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters. Therefore, when the target protein content is input and the temperature in the first half of the growth period is low, the crop-related value derivation unit 10 uses the SPAD value, NDVI value, and other crop index values as parameters. It may be configured to derive the fertilizer application amount at the time of top dressing by using. In the case of this configuration, the crop-related value derivation unit 10 acquires the necessary crop index value when deriving the fertilizer application amount at the time of topdressing.

Although the processing of the crop-related value derivation device 1 in the second modification has been described above, the first modification may be applied to the present modification and the configuration may be as follows. That is, the target state is a model that outputs the amount of fertilizer applied at the time of topdressing by inputting information indicating the temperature level in the first half of the growth of the crop (rice), the NDVI value at the measurement timing, and the SPAD value at the measurement timing. Prepared for each. This model is based on learning data showing the relationship between high and low temperatures in the first half of the past growth, crop index values, and the amount of fertilizer applied at the time of topdressing. It is a trained model in terms of making it output.

Then, the crop-related value derivation unit 10 specifies a model corresponding to the target state, and inputs information indicating the temperature in the first half of the growth period, an NDVI value at the measurement timing, and a SPAD value at the measurement timing into the specified model. Then, the output value is taken as the amount of fertilizer applied at the time of top dressing. The research results of the inventors that the amount of fertilizer applied at the time of topdressing can be derived using the above model, and the accuracy can be improved by deriving the amount of fertilizer applied in consideration of the high and low temperatures in the first half of the growth of the crop. Can be suitably used to derive a highly accurate fertilizer application amount at the time of top dressing. It should be noted that the configuration may be such that a model including the target state as an input may be prepared, and the content of the input crop index value may be changed, which is the same as the first modification.

<Third modification example>
Next, a third modification of the above embodiment will be described. Through research, the inventors have found that the accuracy of the derived fertilizer application amount can be improved by deriving the fertilizer application amount by reflecting the amount of precipitation in the first half of the growth period. This is because the amount of precipitation naturally has a strong (negative) correlation with the amount of solar radiation, and when the amount of precipitation is large, the amount of solar radiation is small, and when the amount of precipitation is small, the amount of solar radiation is large. , It is assumed that the reason is the same as the reason described in the first embodiment. Based on the above, the crop-related value derivation device 1 according to this modification executes the following processing.

When the crop-related value derivation unit 10 according to this modification detects that the input to the input screen G1 is confirmed, the following processing is executed. That is, the crop-related value derivation unit 10 determines the amount of precipitation in the first half of the growth period. In the present embodiment, the amount of precipitation in the first half of growth means whether or not the total amount of precipitation in the first half of growth in the area including the field exceeds a predetermined reference value (threshold value). In the following explanation, when the total precipitation exceeds the standard value, it is called "heavy rainfall", and when it is below the standard value, it is called "heavy rainfall". Similar to the above embodiment, the crop-related value derivation unit 10 determines the amount of precipitation in the first half of growth based on the information stored in the storage unit 11 (hereinafter referred to as “precipitation information in the first half of growth”).

Precipitation information for the first half of growth is generated in advance based on, for example, information on precipitation published by the Japan Meteorological Agency, local governments and other organizations and groups, and observation results by field managers (concepts including organizations and groups). Will be done. The definition of precipitation in the first half of growth in this variant is just an example. Other examples of how to define the amount of precipitation in the first half of growth will be described later.

The crop-related value derivation unit 10 executes the following processing when the target state of the crop input to the input screen G1 is the target yield. That is, when the amount of precipitation in the first half of the growth period is heavy, the crop-related value derivation unit 10 acquires the target NDVI based on the information stored in the storage unit 11. On the other hand, when the amount of precipitation in the first half of the growth period is light rain, the crop-related value derivation unit 10 acquires the target SPAD based on the information stored in the storage unit 11.

Next, the crop-related value derivation unit 10 uses a fertilizer application amount derivation formula (second crop-related value derivation formula) corresponding to the target yield corresponding to the input target yield when the first half of the growing season is heavy rain. It is determined as an expression used for deriving. On the other hand, when the first half of the growth period of this term is rainy season, the crop-related value derivation unit 10 applies the fertilizer application amount derivation formula (first crop-related value derivation formula) corresponding to the target yield corresponding to the input target yield at the time of topdressing. Determined as the formula used to derive the quantity.

The fertilizer application amount derivation formula for the target yield corresponding to a certain target yield is the NDVI value at the measurement timing when the yield of the crop is set as the target yield when the first half of the growth is heavy rain, and the time of topdressing. It is an equation showing the relationship with the amount of fertilizer applied. The fertilizer application amount derivation formula for the target yield is derived in advance for each selectable target yield (candidate target yield). The formula for deriving the amount of fertilizer applied during heavy rain corresponding to each target yield is the relationship between the actual amount of fertilizer applied during topdressing in the past when the first half of growth was heavy rain, the NDVI value at the measurement timing, and the yield of crops. , It is obtained by multiple regression analysis with the yield of crops as the objective variable and the NDVI value at the time of topdressing and the measurement timing as the explanatory variables. The reason why the target yield-corresponding heavy rain fertilizer application amount derivation formula includes the NDVI value in the variable is the same as the reason why the target yield-corresponding fertilizer application amount derivation formula includes the NDVI value in the variable.

In addition, the fertilizer application amount derivation formula for the target yield corresponding to a certain target yield is the SPAD value at the measurement timing and the topdressing when the yield of the crop is set to the target yield when the first half of the growth is heavy rain. It is an equation showing the relationship with the amount of fertilizer applied at the time. Corresponding to the target yield The formula for deriving the amount of fertilizer applied during rain is derived in advance for each selectable target yield (candidate target yield). The formula for deriving the amount of fertilizer applied during rainy season corresponding to each target yield is the relationship between the actual amount of fertilizer applied during topdressing in the past when the first half of growth was rainy season, the SPAD value at the measurement timing, and the yield of crops. , It is obtained by multiple regression analysis with the yield of crops as the objective variable and the value of SPAD at the time of top dressing and the measurement timing as the explanatory variables. The reason why the fertilizer application amount derivation formula corresponding to the target yield includes the value of SPAD in the variable is the same as the reason why the fertilizer application amount derivation formula corresponding to the target yield includes the value of SPAD in the variable.

Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing based on the target NDVI (in the case of heavy rain) or the target SPAD (in the case of heavy rain) using the determined formula. Next, the crop-related value derivation unit 10 controls the display device 2 to display the derived information indicating the amount of fertilizer applied at the time of top dressing in the display area of the display device 2. By referring to the display device 2, the user can recognize the amount of fertilizer applied at the time of topdressing derived by the crop-related value derivation device 1 for the target field, and is a useful reference when determining the amount of fertilizer actually supplied at the time of topdressing. It can be used as information.

The formula for deriving the amount of fertilizer applied during heavy rain corresponding to the target yield was a formula showing the relationship between the target yield, the value of NDVI, and the amount of fertilizer applied during topdressing. It may be replaced with "value of vegetation index". Furthermore, in the formula for deriving the amount of fertilizer applied during heavy rain corresponding to the target yield, the NDVI value (or the vegetation index value measured for a group of crops other than NDVI) and other crop index values (vegetation index measured for a group of crops) are used. (Not limited to the value of) may be included as a parameter. That is, the formula for deriving the amount of fertilizer applied during heavy rain corresponding to the target yield may include the value of NDVI (or the value of the vegetation index measured for a group of crops other than NDVI) as one of the parameters.

In the above case, the fertilizer application amount derivation formula (second crop-related value derivation formula) corresponding to the target yield is, for example, the actual yield of the past crops when the precipitation in the first half of the growth was heavy rain and the crops. Regarding the relationship between the value of one or more indicators including at least the vegetation index measured for the group and the amount of fertilizer applied at the time of topdressing, the yield of the crop is used as the objective variable, and at least the vegetation index measured for the group of crops is included 1. It is derived by multiple regression analysis using the values of one or more indicators and the amount of fertilizer applied at the time of top dressing as explanatory variables.

In addition, the formula for deriving the amount of fertilizer applied during rainfall corresponding to the target yield was a formula showing the relationship between the target yield, the value of SPAD, and the amount of fertilizer applied during topdressing. In this regard, the SPAD value may be replaced with another "value of the index for chlorophyll measured for the leaves of the crop". Furthermore, in the formula for deriving the amount of fertilizer applied during rainfall corresponding to the target yield, the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) and the index value of other crops (the value of the index for chlorophyll measured for the leaves of the crop) (Not limited to the value of the index related to) may be included as a parameter. That is, the formula for deriving the amount of fertilizer applied during rainfall corresponding to the target yield may include the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters.

In the above case, the fertilizer application amount derivation formula (first crop-related value derivation formula) corresponding to the target yield is, for example, the past actual yield of the crop when the precipitation in the first half of the growth was rain, and the crop. Regarding the relationship between the value of one or more indicators including at least the index related to chlorophyll measured for leaves and the amount of fertilizer applied at the time of topdressing, the yield of the crop is used as the objective variable, and the index related to chlorophyll measured for the leaves of the crop is at least. It is derived by multiple regression analysis using the value of one or more indicators including and the amount of fertilizer applied at the time of topdressing as explanatory variables.

Further, the crop-related value derivation unit 10 executes the following processing when the target state of the crop input to the input screen G1 is the target low appearance quality ratio. That is, when the amount of precipitation in the first half of the growth period is heavy rain, the crop-related value derivation unit 10 acquires the target SPAD based on the information stored in the storage unit 11. On the other hand, when the amount of precipitation in the first half of the growth period is heavy, the crop-related value derivation unit 10 does not acquire the target SPAD or the target NDVI.

Next, the crop-related value derivation unit 10 describes the fertilizer application amount derivation formula for heavy rains corresponding to the input target low appearance quality ratio when the first half of the growing season is heavy rain (hereinafter referred to as “low appearance system heavy rain derivation”). The formula ") is determined as the formula used to derive the amount of fertilizer applied during top dressing. On the other hand, when the crop-related value derivation unit 10 is rainy in the first half of the growing season, the fertilizer application amount derivation formula for the input target low appearance quality ratio corresponding to the target low appearance quality ratio (hereinafter referred to as “low appearance system during rain”) The derivation formula) is determined as the formula used to derive the amount of fertilizer applied during top dressing. The low-appearance system derivation formula at the time of heavy rain corresponds to the "third crop-related value derivation formula" in the claims.

The low-appearance system heavy rain derivation formula corresponding to a certain target low-appearance quality ratio is the target low-appearance quality ratio when the low-appearance quality ratio is set as the target low-appearance quality ratio when the first half of growth is heavy rain. It is a formula that defines the relationship with the amount of fertilizer applied at the time of top dressing. The low-appearance system heavy rain derivation formula is derived in advance for each selectable target low-appearance quality ratio (candidate for target low-appearance quality ratio).

On the other hand, the low-appearance-based derivation formula for low-appearance quality corresponding to a certain target low-appearance quality ratio is a target low-appearance quality when the low-appearance quality ratio is set to the target low-appearance quality ratio when the first half of growth is rainy. It is an equation showing the relationship between the ratio, the value of SPAD at the measurement timing, and the amount of fertilizer applied at the time of top dressing. The low-appearance-based rain-time derivation formula is derived in advance for each selectable target low-appearance quality ratio (candidate for the target low-appearance quality ratio). The low-appearance-based derivation formula for low-appearance quality ratio corresponding to each target low-appearance quality ratio is based on the actual amount of fertilizer applied during topdressing in the past when the first half of growth was heavy rain, the SPAD value at the measurement timing, and the low-appearance quality ratio. The relationship is obtained by multiple regression analysis with low appearance quality as the objective variable and the SPAD value at the time of topdressing and the measurement timing as the explanatory variables. The reason why the low-appearance system heavy rain derivation formula contains the value of SPAD in the variable is the same as the reason why the low-appearance system multi-illumination derivation formula contains the value of SPAD in the variable.

Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing using the determined formula. Next, the crop-related value derivation unit 10 controls the display device 2 to display the derived information indicating the amount of fertilizer applied at the time of top dressing in the display area of the display device 2.

The low-appearance system derivation formula at the time of heavy rain was a formula showing the relationship between the target low-appearance quality ratio, the value of SPAD, and the amount of fertilizer applied at the time of top dressing. In this regard, the SPAD value may be replaced with another "value of the index for chlorophyll measured for the leaves of the crop". Furthermore, in the low-appearance-based heavy rain derivation formula, along with the value of SPAD (or the value of the index related to chlorophyll measured for the leaves of crops other than SPAD), the index value of other crops (the index related to chlorophyll measured for the leaves of the crop). (Not limited to the value of) may be included as a parameter. That is, the low-appearance-based heavy rain derivation formula may include the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters.

In the above case, the low-appearance system derivation formula for low-appearance (third crop-related value derivation formula) is, for example, the actual low-appearance quality ratio in the past when the precipitation in the first half of the growth was heavy rain, and the leaves of the crop. Regarding the relationship between the value of one or more indicators including at least the index related to chlorophyll measured for and the amount of fertilizer applied at the time of topdressing, the low appearance quality ratio was used as the objective variable, and the index related to chlorophyll measured for crop leaves was at least. It is derived by multiple regression analysis using the value of one or more indicators including and the amount of fertilizer applied at the time of top dressing as explanatory variables.

In addition, the SPAD value, NDVI value, and other crop index values are not used as parameters in the low-appearance heavy rainfall derivation formula, as in the case of heavy rainfall in the first half of growth. The purpose is not to "use an expression that always includes the SPAD value (or the value of the index related to chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters". Therefore, when the target protein content is input and the precipitation in the first half of the growth period is heavy, the SPAD value, NDVI value, and other crop index values are used as parameters at the time of topdressing. It may be configured to derive the amount of fertilizer applied.

Further, the crop-related value derivation unit 10 executes the following processing when the target state of the crop input to the input screen G1 is the target protein content. That is, when the amount of precipitation in the first half of the growth period is heavy rain, the crop-related value derivation unit 10 acquires the target SPAD based on the information stored in the storage unit 11. On the other hand, when the amount of precipitation in the first half of the growth period is heavy, the crop-related value derivation unit 10 does not acquire the target SPAD or the target NDVI.

Next, the crop-related value derivation unit 10 describes the fertilizer application amount derivation formula for the target protein content corresponding to the input target protein content (hereinafter referred to as "protein-based heavy rain derivation formula") when the first half of the growth period of this season is heavy rain. ) Is determined as the formula used to derive the amount of fertilizer applied during top dressing. On the other hand, when the crop-related value derivation unit 10 is rainy in the first half of the growth period of this term, the fertilizer application amount derivation formula for the target protein content corresponding to the input target protein content (hereinafter referred to as “protein-based protein derivation formula””. ) Is determined as the formula used to derive the amount of fertilizer applied during top dressing. The protein-based rainy season derivation formula corresponds to the "fourth crop-related value derivation formula" in the claims.

The protein-based heavy rain derivation formula corresponding to a certain target protein content is the target protein content and the amount of fertilizer applied at the time of topdressing when the protein content is set as the target protein content in the case of heavy rain in the first half of growth. It is an expression that defines the relationship between. The protein-based heavy rain derivation formula is derived in advance for each selectable target protein content (candidate for target protein content).

On the other hand, the protein-based single-photon avalanche derivation formula corresponding to a certain target protein content is the target protein content and the measurement timing when the protein content is set to the target protein content when the first half of the growth is rainy. It is a formula showing the relationship between the value of SPAD in the above and the amount of fertilizer applied at the time of top dressing. The protein-based rain derivation formula is derived in advance for each selectable target protein content (candidate for target protein content). The protein-based derivation formula for each target protein content is based on the relationship between the actual amount of fertilizer applied during topdressing in the past when the first half of growth was rainy, the SPAD value at the measurement timing, and the protein content. It is obtained by multiple regression analysis with the protein content as the objective variable and the SPAD value at the time of top dressing and the measurement timing as the explanatory variables. The reason why the protein-based heavy rain derivation formula contains the value of SPAD in the variable is the same as the reason why the protein-based multi-illumination derivation formula contains the value of SPAD in the variable.

Next, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing using the determined formula. Next, the crop-related value derivation unit 10 controls the display device 2 to display the derived information indicating the amount of fertilizer applied at the time of top dressing in the display area of the display device 2.

The protein-based rain derivation formula was a formula showing the relationship between the protein content, the SPAD value, and the amount of fertilizer applied during topdressing. In this regard, the SPAD value may be replaced with another "value of the index for chlorophyll measured for the leaves of the crop". Furthermore, in the protein-based rainy season derivation formula, along with the value of SPAD (or the value of the index related to chlorophyll measured for the leaves of crops other than SPAD), the index value of other crops (the value of the index related to chlorophyll measured for the leaves of the crop) (Not limited to the value) may be included as a parameter. That is, the protein-based rainy season derivation formula may include the value of SPAD (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters.

In the above case, the protein-based rainy season derivation formula (fourth crop-related value derivation formula) measures, for example, the actual protein content in the past when the precipitation in the first half of the growth was rainy season, and the leaves of the crop. One that includes at least the index for chlorophyll measured for the leaves of crops, with the protein content as the objective variable for the relationship between the value of one or more indicators including at least the index for chlorophyll that has been added and the amount of fertilizer applied at the time of topdressing. It is derived by multiple regression analysis using the values of the above indicators and the amount of fertilizer applied at the time of top dressing as explanatory variables.

In addition, the SPAD value, NDVI value, and other crop index values are not used as parameters in the protein-based heavy rain derivation formula, as in the case of heavy rain when the precipitation in the first half of growth is heavy rain. The idea is not to use an expression that always includes the SPAD value (or the value of the index for chlorophyll measured for the leaves of crops other than SPAD) as one of the parameters. Therefore, when the target protein content is input and the precipitation in the first half of the growth period is heavy, the fertilizer application is performed using the formula using the SPAD value, NDVI value, and other crop index values as parameters. It may be configured to derive the quantity.

Although the processing of the crop-related value derivation device 1 in the third modification has been described above, the first modification may be applied to this modification and the configuration may be as follows. That is, the target is a model that outputs the amount of fertilizer applied at the time of topdressing by inputting the information indicating the amount of precipitation in the first half of the growth of the crop (rice), the NDVI value at the measurement timing, and the SPAD value at the measurement timing. Prepared for each state. This model is based on learning data showing the relationship between the amount of precipitation in the first half of the past growth, the crop index value, and the amount of fertilizer applied at the time of topdressing. Is a trained model in terms of producing.

Then, the crop-related value derivation unit 10 identifies a model corresponding to the target state, and gives the identified model information indicating the amount of precipitation in the first half of growth, the NDVI value at the measurement timing, and the SPAD value at the measurement timing. Input and use the output value as the amount of fertilizer applied at the time of top dressing. Research by the inventors that the amount of fertilizer applied at the time of topdressing can be derived using the above model, and the accuracy can be improved by deriving the amount of fertilizer applied in consideration of the amount of precipitation in the first half of the growth of the crop. By appropriately utilizing the results, it is possible to derive a highly accurate amount of fertilizer applied at the time of top dressing. It should be noted that the configuration may be such that a model including the target state as an input may be prepared, and the content of the input crop index value may be changed, which is the same as the first modification.

<Fourth modification>
Next, a fourth modification will be described. In the above embodiment, the crop-related value derived by the crop-related value derivation device 1 is the amount of fertilizer applied to the rice at the time of top dressing. In this regard, crop-related values are used in the work of supplying crops with a predetermined amount of material to affect the future state of the crop (although crops whose growth is affected by certain weather conditions in the first half of growth). It may be the amount of the substance. In this case, the crop-related value is, for example, the amount of fertilizer, compost, soil conditioner, plant growth regulator or chemical (including various pesticides) supplied to the crop at a predetermined timing.

In the fourth modification, a plurality of different situations are assumed as the conditions of predetermined meteorological conditions in the first half of the growth of the crop. Then, a plurality of crop-related value derivation formulas for deriving the crop-related values for setting the future state of the crop as the target state are prepared for each type of predetermined meteorological conditions in the first half of the growth of the crop. The crop-related value derivation unit 10 uses the crop-related value derivation formula corresponding to the actual predetermined weather conditions in the first half of the growth of the crop in the target period among the plurality of crop-related value derivation formulas. Derive the value.

The crop-related value derivation formula defines the relationship between the target state of the crop and the crop-related value, or the crop index value, which is the value of the index related to the growth of the crop at a predetermined timing, and the target state of the crop and the crop-related value. It is an expression that defines the relationship with. The crop-related value derivation formula used when the condition of the predetermined weather condition in the first half of the growth of the crop is one situation is when the condition of the predetermined weather condition in the first half of the growth of the crop is the one situation. The relationship between the actual state of the crop and the index value of the crop in the past, or the relationship between the state of the crop and the state of the crop and the value related to the crop is a formula derived by multiple regression analysis with the state of the crop as the objective variable. be.

As an example, in the fourth modification, it is assumed that the crop is rice. In addition, it is assumed that the predetermined meteorological condition is the amount of solar radiation, and that the average total amount of solar radiation is defined as "multi-illumination" that exceeds the predetermined standard value and "illumination" that is below the standard value. .. The crop-related value is the amount of chemicals supplied to the crop at a predetermined timing. The future state of the crop is the yield of the crop.

In this case, it is used as a crop-related value derivation formula for deriving the amount of chemicals (the amount of chemicals to be supplied at a predetermined timing) for setting the yield of crops as the target yield when the first half of growth is multi-illuminated. Some are prepared and some are used when the first half of the growing season is lit. Of the plurality of crop-related value derivation formulas, the crop-related value derivation unit 10 obtains a crop-related value derivation formula corresponding to the actual amount of solar radiation (multi-illumination or illumination) in the first half of the growth of the crop in the target period. Use to derive the amount of drug (crops-related value).

The crop-related value derivation formula defines the relationship between the target yield of the crop and the crop-related value (amount of drug), or the crop index value (value of the index related to the growth of the crop) measured at a predetermined timing for the crop. ) And the relationship between the target state of the crop and the crop-related value. And the crop-related value derivation formula used when the situation of the amount of solar radiation in the first half of the growth of the crop is one situation (multi-illumination or illuminating) is that the situation of the amount of solar radiation in the first half of the growth of the crop is the one situation. Derived from the relationship between the actual crop yield and the crop index value in the past at that time, or the relationship between the crop index value and the crop yield and the crop-related value by multiple regression analysis with the crop yield as the objective variable. It is a formula.

Although the fourth modification has been described above, the fourth modification may have the following configuration. That is, the crop-related value derivation unit 10 outputs at least the crop-related value by inputting at least the condition of the predetermined weather condition in the first half of the growth of the crop and the crop index value which is the value of the index related to the growth of the crop at the predetermined timing. The crop-related values are derived using the model. This model is trained by learning data showing the relationship between the weather conditions in the past actual first half of growth, the crop index value, and the crop-related value.

<Fifth variant>
Next, a fifth modification will be described. In the above embodiment, the crop-related value derived by the crop-related value derivation device 1 is the amount of fertilizer applied to the rice at the time of top dressing. In this regard, crop-related values include fertilizers, composts, soil-improving materials, plant growth modifiers or chemicals to supply crops, expected crop yields, current crop quality estimates, and future crops. It may be one of the expected value of quality, the time when the crop is expected to be in a predetermined state, the estimated value of the damage situation of the crop, and the estimated value of the environmental condition affecting the crop (however). Agricultural crops are crops whose growth is affected by the conditions of predetermined weather conditions in the first half of growth).

Regarding the estimated value of the current quality of the crop and the expected value of the future quality of the crop, the quality of the crop is not only the appearance quality but also the component and internal such as the state of predetermined nutrients and the state of water content. Quality can be achieved. The quality of the crop is, for example, low appearance quality ratio and protein content when the crop is rice, as well as current or future paddy water content and (current or future) brown rice water content.

Further, the time when the crop is predicted to be in a predetermined state is, for example, the time when the crop is in a harvestable state or the time when the crop is heading when the crop is rice. In addition, the estimated values of the damage situation for agricultural products are the situation of lodging (degree), the situation of withering damage (degree), the situation of disease (degree), the situation of damage caused by pests (degree), and the like. In addition, the assumed values of the environmental conditions that affect the crops are, for example, the degree of occurrence of pests in the field, the degree of occurrence of weeds in the field, and the like. In particular, the state (degree) of lodging can be predicted based on the relationship between the amount of fertilizer applied at the time of topdressing and the value of an index related to the growth of crops (for example, the value of NDVI). Using this, the crop-related value derivation unit 10 derives, for example, the fertilizer application amount at the time of topdressing by the method of one embodiment, and then based on the derived fertilizer application amount at the time of topdressing and the value of the index related to the growth of the crop. , Derive the situation of lodging.

In the fifth modification, a plurality of different situations are assumed as the conditions of predetermined meteorological conditions in the first half of the growth of the crop. Then, a plurality of crop-related value derivation formulas for deriving crop-related values are prepared for each of the predetermined weather conditions in the first half of the growth of the crop. Of the plurality of crop-related value derivation formulas, the crop-related value derivation unit 10 uses the crop-related value derivation formula corresponding to the predetermined weather conditions in the first half of the growth of the crop in the target period to obtain the crop-related value. Derived.

As an example, in the fifth modification, it is assumed that the crop is rice. In addition, it is assumed that the predetermined meteorological condition is the amount of solar radiation, and that the average total amount of solar radiation is defined as "multi-illumination" that exceeds the predetermined standard value and "illumination" that is below the standard value. .. Further, the crop-related value is assumed to be the predicted time of the heading time of the crop (the time when the crop is predicted to be in a predetermined state). In this case, as a crop-related value derivation formula for deriving the predicted time of the heading time of the crop, it is used when the first half of the growth is multi-illuminated and when the first half of the growth is bright. Things are prepared. Of the plurality of crop-related value derivation formulas, the crop-related value derivation unit 10 obtains a crop-related value derivation formula corresponding to the actual amount of solar radiation (multi-illumination or illumination) in the first half of the growth of the crop in the target period. It is used (of course, the necessary information is input to the formula) to derive the predicted time of heading of the crop.

Although the fifth modification has been described above, the fifth modification may have the following configuration. That is, the crop-related value derivation unit 10 outputs at least the crop-related value by inputting at least the condition of the predetermined weather condition in the first half of the growth of the crop and the crop index value which is the value of the index related to the growth of the crop at the predetermined timing. The crop-related values are derived using the model. The model is learned from learning data showing the relationship between the weather conditions in the past actual first half of growth, the crop index value, and the crop-related value.

<Sixth modification>
Next, a sixth modification will be described. As described in the above embodiment, the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing, and then displays the information indicating the derived fertilizer application amount at the time of topdressing on the display device 2. On the other hand, the crop-related value derivation unit 10 according to this modification executes the following processing. Hereinafter, an example of the operation of the crop-related value derivation device 1 according to this modification will be described assuming that the target yield is input.

The crop-related value derivation unit 10 derives the amount of fertilizer applied at the time of topdressing to set the yield (state of the crop according to a certain category) of the crop (rice) as the target yield (target state) by the method described in the above embodiment. do. Further, the crop-related value derivation unit 10 is a state showing the protein content (state of crops related to other categories affected by the amount of fertilizer applied at the time of topdressing) when the fertilizer of the derived fertilizer amount is supplied at the time of topdressing. Value) is derived.

To elaborate on the process for deriving the predicted value, a calculation formula for outputting the protein content is derived with the amount of fertilizer applied at the time of topdressing as one of the parameters in advance. Any parameter other than the amount of fertilizer applied at the time of top dressing may be any parameter as long as it affects the future protein content and contributes to the accuracy of the derived protein content. Further, the calculation formula may be one derived by multiple regression analysis, or may be a model learned by a predetermined machine learning method.

After deriving the predicted value of the protein content, the crop-related value deriving unit 10 according to this modification displays the information indicating the derived predicted value of the protein content together with the information indicating the derived fertilizer application amount at the time of top dressing. Display on. That is, the crop-related value derivation unit 10 provides information indicating the derived protein-containing interest rate predicted value together with the derived information indicating the amount of fertilizer applied at the time of top dressing. FIG. 7 shows an example of a screen displayed on the display device 2.

According to this modification, the user can not only recognize the amount of fertilizer applied at the time of topdressing to set the state of the crop according to a certain category (the yield of the crop in the above example) to the target state (the target yield in the above example). , A state value (protein content in the above example) indicating the state of crops related to other categories affected by the amount of fertilizer applied at the time of topdressing when the derived amount of fertilizer applied at the time of topdressing is actually supplied. Can recognize predicted values. That is, the user can recognize what the state of the crops related to other categories will be if the derived fertilizer application amount at the time of topdressing is actually supplied. As a result, when the user finally decides the amount of fertilizer to be applied at the time of topdressing, not only the state of the crops related to one category is set as the target state, but also the state of the crops related to the other category. Considering this, the amount of fertilizer applied at the time of top dressing can be determined.

In the above example, the protein content corresponds to the "state value" in the claims, and the crop-related value derivation unit 10 uses the predicted value of the protein content as the predicted value of the state value together with the amount of fertilizer applied at the time of topdressing. Derived. In this regard, the state value is not limited to the protein content. That is, the state value is the state of the crop according to a category different from that category when the crop-related value derivation unit 10 derives the amount of fertilizer applied at the time of topdressing to set the state of the crop related to a certain category as the target state. Any value may be used as long as it is a value representing the above and is affected by the amount of fertilizer applied at the time of topdressing. As an example, the degree of lodging is used as the state value, and the predicted value indicating what the degree of lodging (state value) will be when the crop-related value derivation unit 10 temporarily supplies the fertilizer of the derived fertilizer application amount is used. It may be a configuration to be derived. Further, the crop-related value derivation unit 10 may be configured to derive the predicted value for a plurality of types of state values.

Further, the sixth modification may have the following configuration. That is, the crop-related value derivation unit 10 may be configured to provide information to the effect that the predicted value exceeds the threshold when the derived predicted value exceeds the threshold. For example, when the state of the crop according to a certain category is "yield of crop" and the state value is "protein content", the crop-related value derivation unit 10 executes the following processing. That is, the crop-related value derivation unit 10 derives the amount of fertilizer applied at the time of topdressing to set the yield of crops (state of crops related to a certain category) as the target yield (target state), and also derives the protein content (fertilization at the time of topdressing). Derivation of predicted values (state values representing the state of crops in other categories affected by quantity). Next, the crop-related value derivation unit 10 determines whether or not the derived predicted value exceeds a predetermined threshold value. The threshold value is set so that when the protein content exceeds this threshold value, the taste is unacceptably poor.

When the predicted value does not exceed the threshold value, the crop-related value deriving unit 10 displays on the display device 2 information indicating the amount of fertilizer applied at the time of topdressing and information indicating the predicted value of the protein content. On the other hand, when the predicted value exceeds the threshold value, the crop-related value deriving unit 10 has the information indicating the amount of fertilizer applied at the time of topdressing and the information indicating the predicted value of the protein content, and the predicted value of the protein content exceeds the threshold value. Information to that effect is displayed (provided) on the display device 2. According to this configuration, the user can not only recognize the predicted value of the state value when the derived fertilizer application amount at the time of top dressing is actually supplied, but also recognize whether or not the predicted value exceeds the threshold value. can. As a result, when the user finally determines the amount of fertilizer applied at the time of topdressing, if the derived amount of fertilizer applied at the time of topdressing is supplied, the amount of fertilizer applied at the time of topdressing is taken into consideration that the predicted value exceeds the threshold value. Can be determined.

The threshold value is set in the following cases. That is, when deriving a predicted value for the state of a crop related to a certain category, if the predicted value exceeds a certain value, the state of the crop may deteriorate, and it is better to alert the user. It is set in such a case.

Further, the sixth modification may have the following configuration. That is, even in a configuration in which the crop-related value derivation unit 10 derives the fertilizer application amount at the time of topdressing so that the state value becomes equal to or less than the threshold value when the predicted value exceeds the threshold value, and provides information indicating the derived fertilizer application amount at the time of topdressing. good. For example, when the state of the crop according to a certain category is "yield of crop" and the state value is "protein content", the crop-related value derivation unit 10 executes the following processing. That is, the crop-related value derivation unit 10 derives the amount of fertilizer applied at the time of topdressing to set the yield of crops (state of crops related to a certain category) as the target yield (target state), and also derives the protein content (fertilization at the time of topdressing). Derivation of predicted values (state values representing the state of crops in other categories affected by quantity). Next, the crop-related value derivation unit 10 determines whether or not the derived predicted value exceeds a predetermined threshold value.

When the predicted value does not exceed the threshold value, the crop-related value deriving unit 10 displays information indicating the amount of fertilizer applied at the time of topdressing on the display device 2. At that time, the crop-related value derivation unit 10 may also display information indicating the predicted value of the protein content. On the other hand, when the predicted value exceeds the threshold value, the crop-related value derivation unit 10 prepares in advance the amount of fertilizer applied at the time of topdressing so that the protein content becomes the threshold value (may be a constant value below the threshold value). Derived based on the calculated formula. The calculation formula may be one derived by multiple regression analysis, or may be a model learned by a predetermined machine learning method. Next, the crop-related value derivation unit 10 displays (provides) on the display device 2 information indicating the derived fertilizer application amount at the time of top dressing. At that time, the crop-related value derivation unit 10 may be configured to display the fertilizer application amount at the time of topdressing first derived and the information indicating the predicted value of the protein content. According to this configuration, the user can recognize the amount of fertilizer applied at the time of top dressing so that the predicted value of the state value does not exceed the threshold value.

Although one embodiment (including a modified example) of the present invention has been described above, the above-described embodiment is merely an example of the embodiment of the present invention, whereby the technical aspects of the present invention are described. The scope should not be construed in a limited way. That is, the present invention can be implemented in various forms without departing from its gist or its main features.

In the following, application examples and modification examples are basically described for the above-described embodiment, but application examples and modification examples may be applied when applicable to the above-mentioned first to fifth modification examples. That is natural.

For example, in the above embodiment, the crop-related value derivation device 1 derives the amount of fertilizer applied at the time of topdressing of rice cultivation for rice. However, the target crops are not limited to rice. That is, when the derived crop-related value is the amount of fertilizer applied at the time of topdressing, the present invention is widely used for crops in which the conditions of predetermined weather conditions in the first half of growth affect the growth and the crops to which topdressing is performed during cultivation. Applicable. As an example, it can be applied to wheat, barley, soybeans and other grains, vegetables, fruits and the like. Further, the top dressing is not limited to the one performed at the timing exemplified in the above embodiment. Further, as described above, the portion of the NDVI value in the above embodiment may be used as a value of a vegetation index similar to NDVI or another "vegetation index measured for a group of crops" such as a vegetation coverage rate. For example, the average value of the leaf areas of a plurality of target crops may be used as this value. Further, as described above, the portion set as the SPAD value in the above embodiment may be used as the value of another "index regarding chlorophyll measured for the leaves of the crop" such as the value of the leaf color plate.

Further, in the above embodiment, the first half of the growth is defined as the period from the transplanting to the field to the time of topdressing, but the first half of the growth is not limited to this period. That is, the first half of the growth is the period of the first half of the growth before the topdressing, and the conditions of predetermined meteorological conditions during that period (in the first embodiment, the amount of solar radiation is large, in the second variant, the temperature is high and low, and the third). In the modified example, the period may be such that improvement in accuracy can be expected by deriving the amount of fertilizer applied at the time of topdressing in consideration of the amount of precipitation). As an example, the first half of growth may be the period from the transplantation to the heading stage (including expectations). In the first half of growth, naturally, depending on the type of crop, a period suitable for that type is adopted. In the first half of growth, of course, a period suitable for the method is adopted depending on the method of cultivating the crop. As an example, when direct sowing is adopted in the field instead of transplanting rice, the period from sowing to topdressing is the first half of growth, and the period from sowing to heading is the first half of growth. It may be a period.

Further, in the above embodiment, regarding the amount of solar radiation in the first half of growth, when the average total amount of solar radiation in the first half of growth in the area including the field exceeds a predetermined reference value (threshold value), the amount of solar radiation is increased. , When it was below the standard value, it was considered as illuminating. However, this is just an example, and the amount of solar radiation in the first half of growth may be determined by other means. For example, for the determination of the amount of solar radiation, the direct solar radiation amount or the scattered solar radiation amount may be used instead of the total solar radiation amount, or other index values related to the solar radiation amount may be used. Further, the amount of solar radiation may be divided into three or more levels according to a plurality of reference values. As a simple example, the amount of solar radiation may be divided into four levels according to three reference values, and an equation for deriving the amount of fertilizer applied at the time of topdressing may be generated in advance for each level.

At that time, for example, when the target yield is input, the NDVI value is always input for the lower two levels with a small amount of solar radiation, and the SPAD value is always input for the upper two levels with a large amount of solar radiation. It can be an expression, an expression that always inputs NDVI for the lower one level, and an expression that always inputs SPAD for the upper three levels. In other words, how many levels of solar radiation should be divided and what kind of content the crop-related value derivation formula should be at each level should be determined appropriately from the viewpoint of improving the accuracy of the derived fertilizer application amount. , It is a matter to be set. The same applies to the "high and low temperature in the first half of growth" according to the second variant and the "precipitation amount in the first half of growth" according to the third variant.

Further, in the above embodiment, the measurement timing is a timing determined based on a specific rule (for example, a rule of 3 weeks before heading), and as a crop-related value derivation formula, the measurement timing related to the specific rule. There was something to enter the value of the index measured in. That is, in the above embodiment, for example, assuming that the measurement timing is set to 3 weeks before heading, the fertilizer application amount derivation formula at the time of target yield corresponding to the heading is performed by inputting the value of NDVI measured 3 weeks before heading. , It was a formula to derive an appropriate amount of fertilizer application. Regarding this, a crop-related value derivation formula may be prepared for each measurement timing rule, and the crop-related value derivation unit 10 may select an appropriate formula according to the timing when the value of each index is measured. For example, regarding the formula for deriving the amount of fertilizer applied at the time of lighting corresponding to the target yield, the formula for inputting the NDVI value measured 4 weeks before heading, the formula for inputting the NDVI value measured 3 weeks before, and the measurement immediately before topdressing. An expression is prepared for each measurement timing rule, such as an expression for inputting the NDVI value, and the crop-related value derivation unit 10 selects an appropriate expression according to the timing at which the NDVI value is measured. But it may be.

Further, the storage unit 11 may have a configuration of an external storage device different from the crop-related value derivation device 1. Further, the crop-related value derivation device 1 is configured as a server on the Internet, and when a client requests to provide information indicating the amount of fertilizer applied at the time of topdressing via the Internet, the amount of fertilizer applied at the time of topdressing is derived by the above-mentioned method. However, it may be configured to be provided to the client. Further, the crop-related value derivation device 1 does not have to be a single computer, and may be configured by a plurality of computers. For example, a terminal connected via the Internet and a cloud server may cooperate with each other to function as a crop-related value derivation device 1, and the terminal may appropriately cooperate with the cloud server to execute processing.

Further, the “state of predetermined meteorological conditions in the first half of the growth of the crop” to be taken into consideration when deriving the amount of fertilizer applied at the time of topdressing is not limited to that exemplified in the above embodiment. Moreover, a plurality of weather conditions may be combined. That is, the condition of the predetermined weather conditions in the first half of the growth of the crop affects the growth of the crop, and it is expected that the accuracy of the crop-related value will be improved by deriving the crop-related value by reflecting this situation. Anything that can be done is fine.

Further, in the above embodiment, the crop-related value derivation unit 10 determines whether or not the average total amount of solar radiation exceeds the reference value in the first half of the growth period. In this regard, the crop-related value derivation unit 10 may determine the amount of solar radiation in the first half of growth based on the value of a predetermined index affected by the amount of solar radiation in the first half of growth. Predetermined indicators that are affected by the amount of solar radiation in the first half of growth are, for example, the NDVI value of the community during the tillering period, the SPAD value of the crop, and the vegetation coverage rate. Depending on whether the NDVI value is larger or smaller than the reference value, the amount of solar radiation in the first half of the growth period may be determined. Similarly, with respect to the second variant, the determination of the temperature in the first half of the growth may be made based on the value of a predetermined index affected by the temperature in the first half of the growth. The determination of the amount of precipitation in the first half of the growth may be performed based on the value of a predetermined index affected by the amount of precipitation in the first half of the growth.

Further, in the above embodiment, the "quality of the components of the harvested product" is the protein content, but the quality of the components of the harvested product is not limited to the protein content.

Further, in the above embodiment, the amount of solar radiation is determined in the first half of the growth period. In other words, the amount of solar radiation corresponds to the "sunlight-related value" in the claims. In this regard, the sunlight-related value is not limited to the amount of solar radiation, and may be a value that is an index of the amount of sunlight in the target period. As an example, "sunshine hours" can be used as a sunlight-related value.

1 Crop-related value derivation device 10 Crop-related value derivation unit

Claims (20)

As a crop-related value related to crops, it is a crop-related value derivation device that derives the amount of fertilizer applied at the time of topdressing to crops so that the yield of crops is the target yield.
Regarding the amount of fertilizer applied during topdressing of crops whose growth is affected by the amount of sunlight-related values, which is an indicator of the amount of sunlight in the first half of growth, and the amount of high and low temperatures or the amount of precipitation, the above-mentioned sunlight-related values in the first half of growth of crops. It is equipped with a crop-related value derivation unit that derives the amount of fertilizer applied at the time of topdressing by a method that reflects either the amount of value, the high or low temperature, or the amount of precipitation.
The crop-related value derivation unit is
When the amount of the sunlight-related value in the first half of the growth of the crop is reflected, when the sunlight- related value is high, when the temperature is high in the case of reflecting the high and low temperature in the first half of the growth of the crop , or when the temperature of the crop is high. When the amount of precipitation reflects the amount of precipitation in the first half of the growing season, when the amount of precipitation is heavy, the target yield of the crop and the value of one or more indicators including at least the indicator related to chlorophyll measured for the leaves of the crop, and the value of one or more indicators. The amount of fertilizer applied at the time of topdressing was derived using the first crop-related value derivation formula showing the relationship with the amount of fertilizer applied at the time of topdressing.
When the amount of the sunlight-related value in the first half of the growth of the crop is reflected, the temperature is lower than the high temperature in the case of reflecting the high and low temperature of the first half of the growth of the crop. When the temperature is low, or when the amount of precipitation is higher than the amount of rainfall in the case of reflecting the amount of precipitation in the first half of the growth of the crop, the target yield of the crop and the vegetation index measured for the group of crops are used. A crop-related value derivation device characterized in that the fertilizer application amount at the time of topdressing is derived using a second crop-related value derivation formula showing the relationship between the value of at least one or more indicators included and the fertilizer application amount at the time of topdressing. .. The crop-related value derivation unit is
When the amount of the sunlight-related value in the first half of the growth of the crop is reflected, the temperature is high when the sunlight- related value is high, when the temperature is high in the first half of the growth of the crop , or when the temperature is high. When the amount of precipitation reflects the amount of precipitation in the first half of the growing season, when the amount of precipitation is heavy, the target yield of the crop and the vegetation measured for the group of crops are included while including the index for chlorophyll measured for the leaves of the crop. The amount of fertilizer applied at the time of topdressing was derived using the first crop-related value derivation formula showing the relationship between the value of one or more indicators not including the index and the amount of fertilizer applied at the time of topdressing.
When the sunlight-related value reflects the amount of the sunlight-related value in the first half of the growth of the crop, when the temperature is low when the temperature of the first half of the growth of the crop is reflected , or when the temperature of the crop is low. When the amount of precipitation reflects the amount of precipitation in the first half of the growth period, when the amount of precipitation is heavy, the target yield of the crop and the chlorophyll measured for the leaves of the crop while including at least the vegetation index measured for the group of the crop. A claim characterized in that the amount of fertilizer applied at the time of topdressing is derived by using the second crop-related value derivation formula showing the relationship between the value of one or more indicators not including the index and the amount of fertilizer applied at the time of topdressing. The crop-related value derivation device according to 1. The first crop-related value derivation formula reflects the amount of the sunlight-related value in the first half of the growth of the crop, and when the sunlight-related value is high, the temperature in the first half of the growth of the crop is high or low. When the temperature is high , or when the amount of precipitation in the first half of the growth of the crop is high, the actual yield of the crop in the past is reflected . Regarding the relationship between the value of one or more indicators used in the first crop-related value derivation formula and the amount of fertilizer applied at the time of top dressing, the yield of the crop is used as the objective variable, and the value of the one or more indicators and the time of top dressing It is an equation derived by multiple regression analysis using the amount of fertilizer applied as an explanatory variable.
In the case where the second crop-related value derivation formula reflects the amount of the sunlight-related value in the first half of the growth of the crop, when the sunlight-related value is lit, the temperature in the first half of the growth of the crop is high or low. When reflecting the temperature was low , or when reflecting the amount of precipitation in the first half of the growth of the crop, when the amount of precipitation was heavy, the actual yield of the crop in the past and the above Regarding the relationship between the value of one or more indicators used in the second crop-related value derivation formula and the amount of fertilizer applied at the time of top dressing, the yield of the crop is used as the objective variable, and the value of the one or more indicators and the value at the time of top dressing The crop-related value deriving apparatus according to claim 1 or 2, wherein the formula is derived by multiple regression analysis using the amount of fertilizer applied as an explanatory variable. As a crop-related value related to crops, it is a crop-related value derivation device that derives the amount of fertilizer applied to crops at the time of topdressing so that the ratio of low-appearance quality crops to the total crop is the target ratio. ,
Regarding the amount of fertilizer applied during topdressing of crops whose growth is affected by the amount of sunlight-related values, which is an indicator of the amount of sunlight in the first half of growth, and the amount of high and low temperatures or the amount of precipitation, the above-mentioned sunlight-related values in the first half of growth of crops. It is equipped with a crop-related value derivation unit that derives the amount of fertilizer applied at the time of topdressing by a method that reflects either the amount of value, the high or low temperature, or the amount of precipitation.
The crop-related value derivation unit is
When the amount of the sunlight-related value in the first half of the growth of the crop is reflected, when the sunlight- related value is high, when the temperature is high in the case of reflecting the high and low temperature in the first half of the growth of the crop , or when the temperature of the crop is high. At least one that includes a target percentage of crops of low appearance quality and at least indicators of chlorophyll measured for crop leaves when precipitation is heavy , reflecting high rainfall in the first half of the growing season. The amount of fertilizer applied at the time of topdressing was derived using the third crop-related value derivation formula showing the relationship between the index value and the amount of fertilizer applied at the time of topdressing .
When the amount of the sunlight-related value in the first half of the growth of the crop is reflected, the temperature is lower than the high temperature in the case of reflecting the high and low temperature of the first half of the growth of the crop. When the temperature is low, or when the amount of precipitation is higher than the amount of rainfall in the case of reflecting the amount of precipitation in the first half of the growth of the crop, it is not always necessary to use the index for chlorophyll measured for the leaves of the crop. Derivation of fertilizer application amount at the time of top dressing
A crop-related value derivation device characterized by this. The crop-related value derivation unit is
When the sunlight-related value reflects the amount of the sunlight-related value in the first half of the growth of the crop, when the temperature is high when the temperature is high in the first half of the growth of the crop , or when the temperature is high in the first half of the growth of the crop. When the amount of precipitation reflects the amount of precipitation in the first half of the growing season, when the amount of precipitation is heavy, the target ratio of crops of low appearance quality and the index of chlorophyll measured for the leaves of the crop are included, while the group of crops. The amount of fertilizer applied at the time of topdressing can be derived using the above-mentioned third crop-related value derivation formula showing the relationship between the value of one or more indexes not including the vegetation index measured for and the amount of fertilizer applied at the time of topdressing. The crop-related value derivation device according to claim 4, which is characterized. The crop-related value derivation unit is
When the sunlight-related value reflects the amount of the sunlight-related value in the first half of the growth of the crop, when the temperature is low when the temperature is low in the case of reflecting the high and low temperature of the first half of the growth of the crop , or when the temperature of the crop is reflected. When the amount of precipitation in the first half of the growing season is reflected and the amount of precipitation is heavy, fertilization at the time of topdressing is performed using a formula showing the relationship between the target ratio of crops of low appearance quality and the amount of fertilizer applied at the time of topdressing. The crop-related value derivation device according to claim 4 or 5, wherein the amount is derived. The third crop-related value derivation formula reflects the amount of the sunlight-related value in the first half of the growth of the crop, and when the sunlight-related value is high, the temperature in the first half of the growth of the crop is high or low. Actual low-appearance quality harvests in the past when the temperature was high when reflecting the high temperature , or when the precipitation was heavy rain when reflecting the amount of precipitation in the first half of the crop growth. Regarding the relationship between the ratio of the product, the value of one or more indicators used in the third crop-related value derivation formula, and the amount of fertilizer applied at the time of topdressing, the ratio of the crop with low appearance quality is used as the objective variable. The crop-related value derivation according to any one of claims 4 to 6, wherein the formula is derived by multiple regression analysis using the value of one or more indicators and the amount of fertilizer applied at the time of topdressing as explanatory variables. Device. As a crop-related value related to crops, it is a crop-related value derivation device that derives the amount of fertilizer applied at the time of topdressing to crops so that the protein content of the harvest is set as the target protein content.
Regarding the amount of fertilizer applied during topdressing of crops whose growth is affected by the amount of sunlight-related values, which is an indicator of the amount of sunlight in the first half of growth, and the amount of high and low temperatures or the amount of precipitation, the above-mentioned sunlight-related values in the first half of growth of crops. It is equipped with a crop-related value derivation unit that derives the amount of fertilizer applied at the time of topdressing by a method that reflects either the amount of value, the high or low temperature, or the amount of precipitation.
The crop-related value derivation unit is
When the amount of the sunlight-related value in the first half of the growth of the crop is reflected, when the sunlight- related value is high, when the temperature is high in the case of reflecting the high and low temperature in the first half of the growth of the crop , or when the temperature of the crop is high. When the amount of precipitation reflects the amount of precipitation in the first half of the growing season, when the amount of precipitation is heavy, the target protein content and the value of one or more indicators including at least the indicator related to chlorophyll measured for the leaves of the crop, and the value of one or more indicators. The amount of fertilizer applied at the time of topdressing was derived using the fourth crop-related value derivation formula showing the relationship with the amount of fertilizer applied at the time of topdressing .
When the amount of the sunlight-related value in the first half of the growth of the crop is reflected, the temperature is lower than the high temperature in the case of reflecting the high and low temperature of the first half of the growth of the crop. When the temperature is low, or when the amount of precipitation is higher than the amount of rainfall in the case of reflecting the amount of precipitation in the first half of the growth of the crop, it is not always necessary to use the index for chlorophyll measured for the leaves of the crop. Derivation of fertilizer application amount at the time of top dressing
A crop-related value derivation device characterized by this. The crop-related value derivation unit is
When the sunlight-related value reflects the amount of the sunlight-related value in the first half of the growth of the crop, when the sunlight-related value is high, when the temperature is high when the temperature of the first half of the growth of the crop is reflected , or when the crop is high. When the amount of precipitation reflects the amount of precipitation in the first half of the growing season, when the amount of precipitation is heavy, the target protein content and the index for chlorophyll measured for the leaves of the crop are included, while the vegetation measured for the group of crops. The claim is characterized in that the amount of fertilizer applied at the time of topdressing is derived by using the fourth crop-related value derivation formula showing the relationship between the value of one or more indicators not including the index and the amount of fertilizer applied at the time of topdressing. 8. The crop-related value derivation device according to 8. The crop-related value derivation unit is
When the sunlight-related value reflects the amount of the sunlight-related value in the first half of the growth of the crop, when the temperature is low when the temperature is low in the case of reflecting the high and low temperature of the first half of the growth of the crop , or when the temperature of the crop is reflected. When the amount of precipitation in the first half of the growth period is reflected and the amount of precipitation is heavy, the amount of fertilizer applied at the time of topdressing should be derived using the formula showing the relationship between the target protein content and the amount of fertilizer applied at the time of topdressing. The crop-related value derivation device according to claim 8 or 9. The fourth crop-related value derivation formula reflects the amount of the sunlight-related value in the first half of the growth of the crop . When the sunlight-related value is high, the temperature in the first half of the growth of the crop is high or low. In the case of reflecting the high temperature , or in the case of reflecting the amount of precipitation in the first half of the growth of the crop, the actual protein content in the past when the amount of precipitation was heavy rain, Regarding the relationship between the value of one or more indicators used in the fourth crop-related value derivation formula and the amount of fertilizer applied at the time of top dressing, the protein content is used as the objective variable, and the value of the one or more indicators and the time of top dressing The crop-related value derivation device according to any one of claims 8 to 10, wherein the formula is derived by multiple regression analysis using the amount of fertilizer applied as an explanatory variable. The crop-related value derivation unit determines the amount of the sunlight-related value in the first half of growth based on the amount of the sunlight-related value in the first half of growth, the value of the index affected by the temperature level or the amount of precipitation. The crop-related value derivation device according to any one of claims 1 to 11, characterized in that. The crop-related value deriving device according to claim 12, wherein the index affected by the amount of the sunlight-related value or the temperature of the first half of the growth is the leaf area or the leaf color. The crop-related value derivation unit derives the amount of fertilizer applied at the time of topdressing to set the state of the crops related to a certain category as the target state, and when the derived amount of fertilizer is supplied, the amount of fertilizer applied at the time of topdressing is used. The crop-related value derivation according to any one of claims 1 to 13, characterized in that a predicted value indicating what the state value representing the state of the crop related to other affected categories will be is derived. Device. The crop-related value derivation device according to claim 14, wherein the crop-related value derivation unit provides information indicating the derived fertilizer application amount at the time of topdressing, and also provides information indicating the derived predicted value. .. The crop-related value derivation device according to claim 15, wherein the crop-related value derivation unit provides information to the effect that the predicted value exceeds the threshold value when the predicted value exceeds the threshold value. The crop-related value derivation unit derives the fertilizer application amount at the time of topdressing so that the state value becomes the threshold value or less when the predicted value exceeds the threshold value, and provides information indicating the derived fertilizer application amount at the time of topdressing. The crop-related value derivation device according to claim 16. As a crop-related value related to crops, it is a crop-related value derivation device that derives the amount of fertilizer applied at the time of topdressing to crops so that the yield of crops is the target yield, and is an index of the amount of sunlight in the first half of growth. Regarding the amount of fertilizer applied at the time of topdressing of crops whose growth is affected by the amount of sunlight-related values, the temperature level or the amount of precipitation, the amount of the sunlight-related values, the temperature level or the amount of precipitation in the first half of the growth of the crops It is a method of deriving crop-related values by a crop-related value deriving device that derives the amount of fertilizer applied at the time of topdressing by a method that reflects any of the above.
When reflecting the amount of the sunlight-related value in the first half of the growth of the crop, it is determined whether the sunlight-related value is in the multi-illumination or less than the multi-illumination, and the temperature in the first half of the growth of the crop is determined. When reflecting high and low, it is determined whether the temperature is high temperature or low temperature lower than high temperature, and when reflecting the amount of precipitation in the first half of the growth of the crop, the precipitation is heavy rain or Steps to determine if there is more rainfall than heavy rainfall,
When the sunlight-related value reflects the amount of the sunlight-related value in the first half of the growth of the crop, when the sunlight-related value is high, when the temperature is high when the temperature reflects the high and low of the temperature in the first half of the growth of the crop, or the crop When the amount of precipitation reflects the amount of precipitation in the first half of the growing season, when the amount of precipitation is heavy, the target yield of the crop and the value of one or more indicators including at least the indicator related to chlorophyll measured for the leaves of the crop, and the value of one or more indicators. The amount of fertilizer applied at the time of topdressing is derived using the first crop-related value derivation formula showing the relationship with the amount of fertilizer applied at the time of topdressing, and the amount of the sunlight-related value in the first half of the growth of the crop is reflected. When the value is bright , when the temperature is low when it reflects the high and low temperatures in the first half of the growth of the crop , or when the precipitation is heavy when it reflects the amount of precipitation in the first half of the growth of the crop. , Top crop using a second crop-related value derivation formula that shows the relationship between the target yield of crops, the value of one or more indicators including at least the vegetation index measured for the group of crops, and the amount of fertilizer applied at the time of top dressing. A method for deriving crop-related values, which comprises a step of deriving the amount of fertilizer applied at the time. As a crop-related value related to crops, it is a crop-related value derivation device that derives the amount of fertilizer applied to crops at the time of topdressing so that the ratio of low-appearance quality crops to the total crop is the target ratio. Regarding the amount of fertilizer applied during topdressing of crops whose growth is affected by the amount of sunlight-related values, which is an indicator of the amount of sunlight in the first half of growth, and the amount of high and low temperatures or the amount of precipitation, the above-mentioned sunlight in the first half of growth of crops. It is a method of deriving crop-related values by a crop-related value deriving device that derives the amount of fertilizer applied at the time of topdressing by a method that reflects either the amount of related values, the high or low temperature, or the amount of precipitation .
When reflecting the amount of the sunlight-related value in the first half of the growth of the crop, it is determined whether the sunlight-related value is in the multi-illumination or less than the multi-illumination, and the temperature in the first half of the growth of the crop is determined. When reflecting high and low, it is determined whether the temperature is high temperature or low temperature lower than high temperature, and when reflecting the amount of precipitation in the first half of the growth of the crop, the precipitation is heavy rain or Steps to determine if there is more rainfall than heavy rainfall,
When the sunlight-related value reflects the amount of the sunlight-related value in the first half of the growth of the crop, when the sunlight-related value is high, when the temperature is high when the temperature reflects the high and low of the temperature in the first half of the growth of the crop, or the crop When the amount of precipitation reflects the amount of precipitation in the first half of the growing season, when the amount of precipitation is heavy, one or more including at least the target ratio of low-appearance quality crops and the index of chlorophyll measured for the leaves of crops. While deriving the amount of fertilizer applied at the time of topdressing using the third crop-related value derivation formula showing the relationship between the index value and the amount of fertilizer applied at the time of topdressing, the amount of the sunlight-related value in the first half of the growth of the crop is reflected. In this case, when the sunlight-related value is less than that of multiple lights, when the temperature is lower than the high temperature when the temperature reflects the high and low temperatures of the first half of the growth of the crop, or when the temperature is lower than the high temperature, or the precipitation in the first half of the growth of the crop. When the amount of precipitation is higher than that of the amount of rainfall, the step of deriving the amount of fertilizer applied at the time of topdressing is included without necessarily using the index related to chlorophyll measured for the leaves of crops. A characteristic method for deriving crop-related values. As a crop-related value related to crops, it is a crop-related value derivation device that derives the amount of fertilizer applied at the time of topdressing to crops so that the protein content of the crop is the target protein content. Regarding the amount of fertilizer applied at the time of topdressing of crops whose growth is affected by the amount of sunlight-related values, which is an indicator of the amount of crops, and the amount of high and low temperatures or the amount of precipitation, the amount of sunlight-related values in the first half of the growth of the crops, the temperature It is a method for deriving crop-related values by a crop-related value deriving device that derives the amount of fertilizer applied at the time of topdressing by a method that reflects either high or low or the amount of precipitation .
When reflecting the amount of the sunlight-related value in the first half of the growth of the crop, it is determined whether the sunlight-related value is in the multi-illumination or less than the multi-illumination, and the temperature in the first half of the growth of the crop is determined. When reflecting high and low, it is determined whether the temperature is high temperature or low temperature lower than high temperature, and when reflecting the amount of precipitation in the first half of the growth of the crop, the precipitation is heavy rain or Steps to determine if there is more rainfall than heavy rainfall,
When the sunlight-related value reflects the amount of the sunlight-related value in the first half of the growth of the crop, when the sunlight-related value is high, when the temperature is high when the temperature reflects the high and low of the temperature in the first half of the growth of the crop, or the crop When the amount of precipitation reflects the amount of precipitation in the first half of the growing season, when the amount of precipitation is heavy, the target protein content and the value of one or more indicators including at least the indicator related to chlorophyll measured for the leaves of the crop, and the value of one or more indicators. While deriving the amount of fertilizer applied at the time of topdressing using the fourth crop-related value derivation formula showing the relationship with the amount of fertilizer applied at the time of topdressing, the sunlight when reflecting the amount of the sunlight-related value in the first half of the growth of the crop. When the related value is less than the high temperature, when the temperature is lower than the high temperature when the temperature reflects the high and low temperature of the first half of the growth of the crop, or when the temperature is lower than the high temperature, or when the temperature is low than the high temperature, or the amount of precipitation in the first half of the growth of the crop is reflected. In the case of heavy rainfall with more than heavy rainfall, the crop-related feature is that it includes a step of deriving the amount of fertilizer applied at the time of topdressing without necessarily using the index related to chlorophyll measured for the leaves of the crop. Value derivation method.

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