JP6881440B2 - Soil condition assessor, method and program - Google Patents

Description

The present invention relates to a soil condition evaluation device for evaluating the soil condition in a field from the viewpoint of reducibility, a soil condition evaluation method, and a soil condition evaluation program.

Since crops are generally grown in soil, soil conditions affect the yield and quality of the crop. In particular, due to the effects of global warming in recent years, crops are becoming more and more damaged and their soundness is impaired. On the other hand, the agricultural management environment is harsh, and reduction of production costs is required. Therefore, it is desirable to appropriately evaluate the soil condition and appropriately implement measures according to the evaluation result, and a technique for appropriately evaluating the soil condition is required.

A technique for evaluating such a soil condition is disclosed in, for example, Patent Document 1. The soil analysis method disclosed in Patent Document 1 is a soil analysis method for analyzing the amount of nutrients for growing various crops in a predetermined soil, and is a step of cutting a predetermined soil to a predetermined depth and collecting a sample. , And the step of treating the collected sample with a treatment solution containing a strong acid to obtain an extract, and chemically analyzing the obtained extract with an ion chromatograph to accurately grasp the amount of nutrients in the soil. Equipped with.

By the way, in the soil analysis method disclosed in Patent Document 1, since a sample is actually taken from the soil and chemically analyzed by an ion chromatograph, it is considered that the nutrient content of the soil can be analyzed relatively accurately. Then, in the paragraph [0012] of the above-mentioned Patent Document 1, "sampling may be performed at a plurality of places appropriately dispersed so that necessary data can be collected from the entire farm so that accurate analysis results can be obtained. However, it is preferable to use a total of 6 points, which are the four corners of the entire farm and any two points on the diagonal line, as sampling points. "

On the other hand, when evaluating so-called reduction disorders, reduction disorders rarely occur in the entire field, and often occur in various places in the field. Therefore, in order to evaluate the reduction disorder by sampling a sample from the soil as in the soil analysis method disclosed in Patent Document 1, it is necessary to sample at a large number of places over the entire field. It is troublesome and inefficient. In the first place, sampling a sample from soil itself takes time and effort.

Japanese Unexamined Patent Publication No. 2014-106089 (Patent No. 5351325)

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a soil condition evaluation device, a soil condition evaluation method, and a soil condition evaluation program capable of more efficiently evaluating the degree of reducibility. is there.

In the soil condition evaluation device, the soil condition evaluation method, and the soil condition evaluation program according to the present invention, a heat distribution image of the field to be evaluated is acquired, the temperature of the field is acquired, and the acquired heat distribution image of the field is acquired. And the acquired temperature of the field, an evaluation value indicating the degree of reducibility in the soil of the field is obtained.

The above and other objectives, features and advantages of the present invention will become apparent from the following detailed description and accompanying drawings.

It is a figure for demonstrating the correlation between the occurrence of reduction disorder in a field, and the temperature of a crop. It is a figure for showing the structure of the soil condition evaluation system in an embodiment. It is a figure which shows the evaluation material conversion information table stored in the soil condition evaluation apparatus of the soil condition evaluation system. It is a flowchart which shows the operation of the soil condition evaluation apparatus of the soil condition evaluation system. As an example, it is a schematic diagram which shows the temperature distribution image of a field. It is a figure which shows the evaluation value map obtained based on the temperature distribution image of the field which is schematically shown in FIG. It is a figure which shows the material quantity map obtained based on the evaluation value map shown in FIG.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. It should be noted that the configurations with the same reference numerals in the respective drawings indicate that they are the same configurations, and the description thereof will be omitted as appropriate. In the present specification, when they are generically referred to, they are indicated by reference numerals without subscripts, and when they refer to individual configurations, they are indicated by reference numerals with subscripts.

(Correlation)
First, the correlation between the degree of reducing property in the field and the temperature of the crop will be described based on an experimental example.

FIG. 1 is a diagram for explaining the correlation between the occurrence of reduction disorders in the field and the temperature of crops. FIG. 1A is a diagram showing a heat distribution image of a paddy field, and FIG. 1B is a diagram showing an average value of the number of ears in rice grown in the paddy field. The paddy fields to be tested are the lime N section shown on the left side of the paper, which is the area where 20 kg of lime nitrogen is supplied per 10 ares (a) as the material for improving the reduction disorder, and the area where the material is not supplied, which is the paper surface. It was divided into the control group shown on the right side. Water is drawn into the paddy fields between the lime N section and the control section from the "water outlet" shown above the paper surface, flows from the upper part of the paper surface to the lower part of the paper surface, and is drained from the "mizujiri". Each of the lime N group and the control group is divided into 3 pieces in the horizontal direction of the paper surface and 6 pieces in the vertical direction of the paper surface, and is divided into 3 × 6 = 18 sub-regions. The average value of the number of ears of rice is a value obtained by averaging the number of ears of rice growing in one sub-region, and is displayed in FIG. 1B in units of ^{book / m 2.} In the heat distribution image of the paddy field shown in FIG. 1A, the darker the color on the gray scale, the higher the heat radiation from the paddy field, in other words, the temperature of the paddy field, and in other words, the higher the temperature of the rice. The temperature of the surrounding environment of the paddy field when the heat distribution image of the paddy field shown in FIG. 1A was taken was 31.2 ° C.

1B, the in control group of right side, a subregion nine average value of the number of ears of rice are ^two 400 / m, the average value of the number of ears of rice are ^two 500 / m there is a sub-area 8, while the sub-region is one mean value of the number of ears of rice are ^two 600 / m, the lime N group of the left side, the average value of the number of ears of rice There are two sub-regions with 400 / m ² units, and the average number of rice ears is 500 / m. ^{There are four sub-regions with 2} units, and the average number of rice ears is 600. There are 12 sub-areas with ² units / m. Therefore, in the lime N section, the degree of reducing property is small in most of the regions due to the material of lime nitrogen, and the occurrence of reduction disorders is suppressed, and as a result, rice grows smoothly. On the other hand, in the control group, on the contrary, the degree of reducing property is increased in some places, reduction disorders occur in the above-mentioned places, and the growth of rice is not smooth. In the control group, in particular, in the nine sub-regions shown by circles in FIG. 1B, the average number of rice ears in the sub-regions was 435 / m ^{2 to} 498 / m ^2, which is clear. , Growth is poor due to reduction disorder.

On the other hand, looking at this in the heat distribution image, as shown in FIG. 1A, the number of sub-regions with relatively high heat (high temperature of paddy fields and high temperature of rice) is smaller in the lime N group than in the control group. It can be seen that the temperature of the paddy field (rice temperature) in the lime N plot is lower than the paddy field temperature (rice temperature) in the control plot. In particular, the temperature of the paddy field (rice temperature) in the nine sub-regions shown by enclosing in FIG. 1B is clearly higher than the temperature of the paddy field in the adjacent lime N section (rice temperature).

This is because in the lime N section, the degree of reducibility is small in most areas due to the material of lime nitrogen, and the occurrence of reduction disorders is suppressed, and as a result, rice grows smoothly and the temperature is 31.2. Despite being relatively hot at ° C, water was carried throughout the rice and the amount of evaporation from the pores was smooth, which is thought to be due to the low temperature of the paddy field (rice temperature), while In the control group, on the contrary, the degree of reducibility increases in some places, reduction disorders occur in the above-mentioned places, the growth of rice is not smooth, and when the temperature is relatively hot at 31.2 ° C, the whole rice is moisturized. It is considered that this is because the rice was not carried and the amount of evaporation from the pores decreased, and as a result, the temperature of the paddy field (rice temperature) increased.

In this way, there is a correlation between the degree of reducing property in the field and the temperature of the crop.

(Soil condition evaluation system S (heat distribution image generator M, soil condition evaluation device P))
FIG. 2 is a diagram for showing the configuration of the soil condition evaluation system in the embodiment. FIG. 3 is a diagram showing an evaluation material conversion information table stored in the soil condition evaluation device of the soil condition evaluation system.

Based on these findings, the soil condition evaluation device in the present embodiment is a device that evaluates the soil condition, and acquires a heat distribution image acquisition unit that acquires a heat distribution image in the field to be evaluated and a temperature of the field. Based on the field temperature acquisition unit, the heat distribution image of the field acquired by the heat distribution image acquisition unit, and the temperature of the field acquired by the field temperature acquisition unit, the reducibility of the soil in the field It is equipped with a soil reducibility evaluation unit that obtains an evaluation value indicating the degree. In such a soil condition evaluation device, the heat distribution image acquisition unit captures infrared rays radiated from the field to be evaluated and generates a heat distribution image (thermogram) showing the heat distribution as a diagram. The generator (thermograph, infrared camera) itself may be used, but in the following, as an example, the heat distribution image acquisition unit wirelessly receives a heat distribution image in the field to be evaluated from the heat distribution image generation device. A communication interface unit (for example, a communication card).

More specifically, in FIG. 2, the soil condition evaluation system S includes a heat distribution image generation device M and a soil condition evaluation device P that is wirelessly communicatively connected to the heat distribution image generation device M.

The heat distribution image generation device M is a device that generates a heat distribution image SP in the field AR to be evaluated. The heat distribution image generator M is attached to the tip of a long rod such as a rod to generate a heat distribution image SP of the field overlooking the field AR from above, or is relatively adjacent to the field AR. If there is a tall building, the heat distribution image SP of the field may be generated from the building, but in the present embodiment, an aircraft is provided and the heat distribution image SP of the field is generated from the sky. It is configured.

More specifically, as shown in FIG. 2, the heat distribution image generation device M includes a GPS 21, a temperature measurement unit 22, a control unit 23, a heat distribution image generation unit 24, a storage unit 25, and a communication interface unit 26. And the aircraft 27.

Aircraft 27 is a device that flies in the atmosphere, such as balloons, airships, airplanes, helicopters, and multicopters. The aircraft 27 may be a manned aircraft, but is preferably an unmanned aerial vehicle (drone) by radio-controlled flight (guided flight) or autonomous flight. In the present embodiment, the aircraft 27 is connected to the control unit 23 and flies under the control of the control unit 23 by guided flight or autonomous flight.

The GPS (Global Positioning System) 21 is a device that is connected to the control unit 23 and measures the position pap of the aircraft 27 by a satellite positioning system for measuring the current position on the earth under the control of the control unit 23. The positioning result (position Pap (latitude Xap, longitude Yap, altitude Zap)) is output to the control unit 23. The GPS 21 may be a GPS having a correction function for correcting an error such as a DGSP (Differential GSP).

The air temperature measuring unit 22 is a temperature sensor connected to the control unit 23 and measures the air temperature Ts of the field under the control of the control unit 23, and outputs the air temperature Ts of the measurement result to the control unit 23. In the present embodiment, since the air temperature Ts of the field is measured by the air temperature measuring unit 22 mounted on the aircraft 27, it is preferable that the aircraft 27 flies at a relatively low altitude. Further, when the air temperature Ts of the field measured by the air temperature measuring unit 22 mounted on the aircraft 27 is different from the actual air temperature Tr of the field on the ground, it is measured by the air temperature measuring unit 22 mounted on the aircraft 27. The difference between the air temperature Ts of the field and the actual air temperature Tr of the field on the ground was measured in advance by a plurality of samples for each altitude of the aircraft 27, and by using this result, the air temperature mounted on the aircraft 27 was used. The air temperature Ts of the field measured by the measuring unit 22 may be corrected so as to be the actual air temperature Tr of the field on the ground.

The heat distribution image generation unit 24 is connected to the control unit 23, and under the control of the control unit 23, images infrared rays radiated from the field AR to be evaluated, and a heat distribution image (thermogram) showing the heat distribution as a diagram. It is a heat distribution image generation device (thermograph, infrared camera) that generates SP, and outputs the generated heat distribution image SP to the control unit 23. Such a heat distribution image generation unit 24 is arranged, for example, an imaging optical system that forms an infrared image in a field AR to be evaluated on a predetermined imaging surface, and a light receiving surface that coincides with the imaging surface. The infrared image sensor that converts the image into an electrical signal and the output of the infrared image sensor are subjected to image processing such as converting the amount of infrared radiation into heat (temperature) to obtain a heat distribution image (heat distribution). Image data) An image processing unit or the like for generating SP is provided.

The communication interface unit (communication IF unit) 26 is a communication circuit that is connected to the control unit 23 and wirelessly communicates according to the control of the control unit 23. The communication IF unit 26 generates a communication signal including data to be transferred input from the control unit 23 according to a communication protocol used between the heat distribution image generation device M and the soil condition evaluation device P, and this The generated communication signal is transmitted to the soil condition evaluation device P. The communication IF unit 26 receives a communication signal from the soil condition evaluation device P, extracts data from the received communication signal, converts the extracted data into data in a format that can be processed by the control unit 23, and controls the control unit 23. Output to. The communication IF unit 26 is configured to include, for example, a communication interface circuit according to the IEEE802.11 standard or the like.

The storage unit 25 is a circuit that is connected to the control unit 23 and stores various predetermined programs and various predetermined data under the control of the control unit 23. The various predetermined programs include, for example, a control program that controls each unit 21, 22, 24 to 27 of the heat distribution image generator M according to the function of each unit, positioning by GPS 21, and a temperature measurement unit 22. The positioning, the temperature measurement, and the imaging are performed by the GPS 21, the temperature measuring unit 22, and the heat distribution image generating unit 24, respectively, so that the temperature measurement by the above and the imaging by the heat distribution image generation unit 24 are synchronized with each other. The positioning result Pap obtained by the GPS 21, the temperature measuring unit 22, and the heat distribution image generating unit 24 by the measurement control program, the temperature Ts of the measurement result, and the temperature Ts of the measurement result were imaged and generated. A control processing program such as a data transmission program for transmitting the heat distribution image SP from the communication IF unit 26 to the soil condition evaluation device P as a communication signal is included. The various predetermined data include data necessary for the process of capturing and generating the heat distribution image SP of the field, such as the communication address of the soil condition evaluation device P, for example. The storage unit 25 includes, for example, a ROM (Read Only Memory) which is a non-volatile storage element, an EEPROM (Electrically Erasable Programmable Read Only Memory) which is a rewritable non-volatile storage element, and the like. The storage unit 25 includes a RAM (Random Access Memory) or the like that serves as a working memory of the so-called control unit 23 that stores data or the like generated during the execution of the predetermined program.

The control unit 23 controls each unit 21, 22, 24 to 27 of the heat distribution image generation device M according to the function of each unit, and controls the entire heat distribution image generation device M. The control unit 23 performs the positioning, the temperature measurement, and the imaging, respectively, so that the positioning by the GPS 21, the temperature measurement by the temperature measuring unit 22, and the imaging by the heat distribution image generation unit 24 are synchronized with each other. Each of the temperature measuring unit 22 and the heat distribution image generating unit 24 is made to execute. The control unit 23 obtains the positioning result Pap obtained by each of the GPS 21, the temperature measurement unit 22, and the heat distribution image generation unit 24, the temperature Ts of the measurement result, and the heat distribution image SP generated by imaging. The communication signal is transmitted from the communication IF unit 26 to the soil condition evaluation device P. The control unit 23 includes, for example, a CPU (Central Processing Unit) and peripheral circuits thereof.

The GPS 21, temperature measuring unit 22, control unit 23, heat distribution image generation unit 24, storage unit 25, and communication IF unit 26 are mounted on the aircraft 27 and arranged at appropriate positions.

On the other hand, as shown in FIG. 2, the soil condition evaluation device P includes a communication IF unit 11, a control processing unit 12, a storage unit 13, an input unit 14, and an output unit 15.

The communication IF unit 11 is a communication circuit that is connected to the control processing unit 12 and wirelessly communicates according to the control of the control processing unit 12, similarly to the communication IF unit 26. The communication IF unit 11 is configured to include, for example, a communication interface circuit according to the IEEE802.11 standard or the like.

As will be described later, the heat distribution image SP in the field AR to be evaluated and the air temperature Ts of the field are acquired from the heat distribution image generator M by the communication IF unit 11, so that the communication IF unit 11 is the evaluation target. It corresponds to an example of a heat distribution image acquisition unit that acquires a heat distribution image SP in a field AR, and also corresponds to an example of a field temperature acquisition unit that acquires the air temperature Ts of the field.

The input unit 14 is connected to the control processing unit 12, and is connected to, for example, various commands such as a command for instructing the start of evaluation, and various data necessary for evaluating the field AR such as the name and evaluation conditions of the field AR. It is a device for inputting to the soil condition evaluation device P, for example, a plurality of input switches to which predetermined functions are assigned, a keyboard, a mouse, and the like. The evaluation conditions are predetermined conditions set in advance when the heat distribution image SP and the air temperature Ts of the field are actually measured, and are compared with the setting evaluation conditions stored in the setting evaluation condition information storage unit 135 described later. Will be done. In the present embodiment, the set evaluation condition is a condition for determining whether or not an evaluation value is significantly obtained by the soil reducibility evaluation unit 123, which will be described later. In view of the above-mentioned reduction failure process, the setting evaluation condition preferably includes that the temperature Ts of the field is equal to or higher than a preset predetermined temperature Th, and in the present embodiment, the weather is fine or sunny. It further includes that the time is from 9:00 to 15:00. Therefore, the evaluation condition includes the air temperature Ts of the field. The air temperature Ts of the field is measured by the air temperature measuring unit 22, and the measured air temperature Ts of the field is acquired from the heat distribution image generator M by the communication IF unit 11. Therefore, the communication IF unit 11 also corresponds to an example of an evaluation condition receiving unit that accepts evaluation conditions from the outside. The predetermined temperature Th is set to an appropriate value, for example, 25 ° C., 28 ° C., 30 ° C., etc. by considering the process of reduction failure. Moreover, from the above, the evaluation condition includes the weather and the time. These weather and time are input from the input unit 14. Therefore, the input unit 14 corresponds to another example of the evaluation condition receiving unit that accepts the evaluation condition from the outside.

The output unit 15 is connected to the control processing unit 12, and according to the control of the control processing unit 12, commands and data input from the input unit 14, and an evaluation value EV and a material amount obtained by the soil condition evaluation device P. It is a device that outputs MV and the like, and is, for example, a display device such as a CRT display, an LCD and an organic EL display, a printing device such as a printer, and the like.

The touch panel may be composed of the input unit 14 and the output unit 15. In the case of configuring this touch panel, the input unit 14 is a position input device that detects and inputs an operation position such as a resistance film method or a capacitance method, and the output unit 15 is a display device. In this touch panel, a position input device is provided on the display surface of the display device, candidates for one or more input contents that can be input to the display device are displayed, and the user touches the display position displaying the input contents to be input. Then, the position is detected by the position input device, and the display content displayed at the detected position is input to the soil condition evaluation device P as the operation input content of the user. With such a touch panel, since the user can intuitively understand the input operation, the soil condition evaluation device P that is easy for the user to handle is provided.

In the present embodiment, the temperature Ts of the field is acquired from the heat distribution image generator M by the communication IF unit 11, but the operator measures the temperature in the field AR with a thermometer and measures the measured temperature with the temperature of the field. It may be input from the input unit 14 as Ts. In particular, this method is useful when the above-mentioned heat distribution image generator is attached to the tip of a rod to acquire a field heat distribution image SP, or when a field heat distribution image SP is acquired from an adjacent building or the like. Is. Therefore, in such a case, the input unit 14 corresponds to another example of the field air temperature acquisition unit that acquires the air temperature Ts of the field.

The storage unit 13 is a circuit that is connected to the control processing unit 12 and stores various predetermined programs and various predetermined data under the control of the control processing unit 12. The various predetermined programs include, for example, a control program that controls each part 11, 13 to 15 of the soil condition evaluation device P according to the function of each part, and a heat distribution in the field acquired by the communication IF unit 11. Reduction in the soil of the field based on the field temperature treatment program for obtaining the temperature Tar of the field based on the image SP, the heat distribution image SP of the field acquired by the communication IF unit 11, and the temperature Ts of the field. Based on the soil reducibility evaluation program for obtaining the evaluation value EV indicating the degree of sex and the evaluation value EV obtained in the soil reducibility evaluation program, the amount of material for improving the reducibility MV is calculated. A control processing program such as a processing program is included. The various predetermined data include, for example, the communication address of the heat distribution image generator M, the heat distribution image SP of the field, the temperature conversion information for obtaining the temperature distribution Tar of the field from the heat distribution image SP of the field, and the field. From the temperature distribution information Tarp, the evaluation value conversion information for obtaining the evaluation value EV from the difference between the field temperature Tar and the field temperature Ts, the field reducibility evaluation map EVm, and the field reducibility evaluation map EVm of the field. It includes data required for evaluating the soil condition of the field, such as material amount conversion information for obtaining the material amount map MVm and the material amount map MVm of the field. The storage unit 13 includes, for example, a ROM, an EEPROM, or the like. The storage unit 13 includes a RAM or the like that serves as a working memory of the so-called control processing unit 12 that stores data or the like generated during the execution of the predetermined program. Then, in order to store each of the above-mentioned information, the storage unit 13 functionally has a heat distribution information storage unit 131, a temperature distribution information storage unit 132, a reducibility evaluation information storage unit 133, and a material amount information storage unit 134. , The setting evaluation condition information storage unit 135 and the conversion information storage unit 136 are provided.

The heat distribution information storage unit 131 stores the heat distribution image (heat distribution image data) SP of the field. In the present embodiment, the heat distribution information storage unit 131 synchronizes with the image capture of the heat distribution image SP of the field received by the communication IF unit 11 and the heat distribution image generation unit 24 in order to generate the heat distribution image SP. The position Pap of the positioning result of the GPS 21 and the air temperature Ts of the measurement result of the air temperature measuring unit 22 obtained above are stored in association with each other.

The temperature distribution information storage unit 132 stores the temperature distribution image Tarp of the field. In the present embodiment, the temperature distribution information storage unit 132 stores the temperature distribution image Tarp of the field obtained based on the heat distribution image SP of the field by using the temperature conversion information by the field temperature processing unit 122 described later. To do. The temperature distribution image Tarp of this field is stored in the temperature distribution information storage unit 132 in association with the position Pap associated with the heat distribution image SP of the field and the air temperature Ts of the field used when obtaining the Tarp.

The reducibility evaluation information storage unit 133 stores the reducibility evaluation map EVm of the field. In the present embodiment, the reducibility evaluation information storage unit 133 was obtained by the soil reducibility evaluation unit 123, which will be described later, based on the temperature Tar of the field and the air temperature Ts of the field by using the evaluation value conversion information. The reducibility evaluation map EVm of the field is stored. The reducibility evaluation map EVm of this field is associated with the position Pap associated with the temperature distribution image Tarp of the field (that is, the heat distribution image SP of the field) and the air temperature Ts of the field used in obtaining the map. It is stored in the reducibility evaluation information storage unit 133.

The material amount information storage unit 134 stores the material amount map MVm of the field. In the present embodiment, the material amount information storage unit 134 uses the material amount conversion information described later by the material amount processing unit 124 to obtain a field material amount map based on the field reducibility evaluation map EVm. Memorize MVm. The material amount map MVm of this field is stored in the material amount information storage unit 134 in association with the position Pap associated with the reducibility evaluation map EVm (that is, the heat distribution image SP of the field) used when obtaining the map MVm. It will be remembered.

The setting evaluation condition information storage unit 135 stores the setting evaluation condition. In the present embodiment, as described above, the setting evaluation condition information storage unit 135 stores that the temperature Ts of the field is equal to or higher than the predetermined temperature Th as one of the setting evaluation conditions, and further, the weather. It is stored as one of the other setting evaluation conditions that the weather is fine or sunny and the time is from 9:00 to 15:00.

The conversion information storage unit 136 stores the temperature conversion information, the evaluation value conversion information, and the material amount conversion information. These temperature conversion information, evaluation value conversion information, and material amount conversion information are each generated by measuring a plurality of samples in advance and statistically processing the measurement results, and are stored in the conversion information storage unit 136. Then, in the present embodiment, the evaluation value conversion information and the material amount conversion information are collected in one table in a table format and stored in the conversion information storage unit 136.

In the evaluation material conversion information table CT for registering the evaluation value conversion information and the material amount conversion information, for example, as shown in FIG. 3, the difference ΔT for registering the difference between the temperature Tar of the field and the temperature Ts of the field. The field 311 and the evaluation value field 312 for registering the evaluation value EV corresponding to the difference ΔT registered in the difference ΔT field 311 and the amount of material corresponding to this evaluation value field (in other words, the difference ΔT field 311). A material amount corresponding to the registered difference ΔT) A material amount field 313 for registering the MV is provided, and a record is provided according to the number of types of the evaluation value EV.

The evaluation value EV is multi-stage and includes an evaluation indicating the presence or absence of the occurrence of reduction disorder. More specifically, in the present embodiment, the evaluation value EV has four stages of "no reducing property", "weak reducing property", "medium reducing property" and "strong reducing property", and the above-mentioned "no reducing property". "Does not cause reduction failure", and the "strong reducing property" means "with reduction failure".

Therefore, in the present embodiment, the evaluation material conversion information table CT shown in FIG. 3 has four records. In the first record, when the difference ΔT obtained by subtracting the temperature Ts of the field from the temperature Tar of the field by each field 313-1313 is 0 or less (ΔT ≦ 0). It is registered that the evaluation value EV is non-reducing and the material amount MV is 0 [kg / 10a] (0 kg per 10 ares). In the second record, when the difference ΔT obtained by subtracting the temperature Ts of the field from the temperature Tar of the field by each field 313-1313 is greater than 0 and less than or equal to Th1 (0 < It is registered that ΔT ≦ Th1), the evaluation value EV is weakly reducing, and the material amount MV is V1 [kg / 10a] (V1 kg per 10 ares). In the third record, when the difference ΔT obtained by subtracting the temperature Ts of the field from the temperature Tar of the field by each field 313-1313 is greater than Th1 and less than or equal to Th2 (Th1 < ΔT ≦ Th2), it is registered that the evaluation value EV is medium subtractive and the material amount MV is V2 [kg / 10a] (V2 kg per 10 ares). Then, in the fourth record, when the difference ΔT obtained by subtracting the temperature Ts of the field from the temperature Tar of the field by each field 313-1313 is larger than Th2 (Th2 <ΔT). It is registered that the evaluation value EV is strongly subtractive and the material amount MV is V3 [kg / 10a] (V1 kg per 10 ares).

In one example, Th1 is + 1.5 ° C., + 2 ° C., + 2.5 ° C., etc., Th2 is + 3.5 ° C., + 4 ° C., + 4.5 ° C., etc., and Th1 <Th2. In one example, the V1 is 10 [kg / 10a], the V2 is 20 [kg / 10a], and the V3 is 30 [kg / 10a], where V1 <V2 <V3. is there.

The control processing unit 12 controls each unit 11, 13 to 15 of the soil condition evaluation device P according to the function of each unit, obtains an evaluation value EV and a material amount MV, and controls the entire soil condition evaluation device P. It is a thing. The control processing unit 12 is configured to include, for example, a CPU (Central Processing Unit) and peripheral circuits thereof. By executing the control processing program, the control processing unit 12 is functionally configured with the control unit 121, the field temperature processing unit 122, the soil reducibility evaluation unit 123, and the material amount processing unit 124.

The control unit 121 controls each unit 11, 13 to 15 of the soil condition evaluation device P according to the function of each unit. When the control unit 121 receives the heat distribution image SP of the field from the heat distribution image generator M by the communication IF unit 11 by the communication signal, the control unit 121 receives the heat distribution image SP of the field, the position Pap, and the temperature Ts accommodated in the communication signal. Are associated with each other and stored in the heat distribution information storage unit 131.

The field temperature processing unit 122 obtains the temperature Tar of the field based on the heat distribution image SP of the field received by the communication IF unit 11. More specifically, the field temperature processing unit 122 uses the temperature conversion information stored in the conversion information storage unit 136 to set each pixel in the heat distribution image SP of the field to a temperature corresponding to the pixel value. By converting, an image (temperature distribution image) Tarp showing the temperature distribution of the field is obtained. Therefore, each pixel of the temperature distribution image Tarp of this field represents the temperature Tar of the field at the pixel position. Then, the field temperature processing unit 122 stores the obtained temperature distribution image Tarp in the temperature distribution information storage unit 132 in association with the position Pap and the air temperature Ts associated with the heat distribution image SP of the field.

The soil condition evaluation unit 123 evaluates the field based on the difference between the temperature distribution image Tarp of the field obtained by the field temperature treatment unit 122 and the temperature Ts of the field received by the communication IF unit 11. EV is calculated in multiple stages. More specifically, the soil condition evaluation unit 123 evaluates the difference between the temperature distribution image Tarp of the field and the air temperature Ts of the field using the evaluation value conversion information stored in the conversion information storage unit 136. Convert to value EV. This conversion to the evaluation value EV may be executed for each pixel, but in the present embodiment, the soil condition evaluation unit 123 displays the temperature distribution image Tarp of the field as a sub-region having a predetermined size set in advance. It is divided into SARs, the representative value of the temperature Tar is obtained for each of these subregions SAR, the difference between the temperature Tar of the obtained representative value and the temperature Ts of the field is obtained, and this difference is used as the evaluation value conversion information. Convert to evaluation value EV using. In one heat distribution image SP, that is, one corresponding temperature distribution image Tarp, the air temperature Ts of the field is considered to be the same over the entire field (in each sub-region SAR). As a result, a reducibility evaluation map EVm to which an evaluation value EV (SAR) is given for each sub-region SAR is created. The sub-region SAR has an arbitrary shape (for example, a triangle, a quadrangle, a hexagon, etc.) and an arbitrary width (0.5 are, 1 are, 2 ares, etc.) as long as the field AR can be divided without gaps. It is good, but in one example, it is a square with a side of 5 m or 10 m. The representative value may be, for example, the average value of all pixels in the sub-region SAR, or may be, for example, the median value of the sub-region SAR. Then, the soil reducibility evaluation unit 123 associates the obtained reducibility evaluation map EVm with the position Pap associated with the temperature distribution image Tarp of the field and the temperature Ts of the field, and associates the reducibility evaluation information storage unit. Store in 133.

Here, in the present embodiment, the soil reducibility evaluation unit 123 satisfies the setting evaluation condition stored in the setting evaluation condition information storage unit 135 when the evaluation conditions received by the communication IF unit 11 and the input unit 14 satisfy the setting evaluation condition. The evaluation value EV obtained as described above is obtained as the final evaluation value EV. More specifically, the soil reducibility evaluation unit 123 sets the evaluation value EV as the final evaluation value EV when the temperature Ts of the field received by the communication IF unit 11 is equal to or higher than the predetermined temperature Th. To do. Further, in the present embodiment, the soil reducibility evaluation unit 123 evaluates the field when the heat distribution image SP of the field is sunny or sunny and is imaged at any time between 9:00 and 15:00. Let the value EV be the final evaluation value EV.

The material amount processing unit 124 obtains the amount MV of the material for improving the reducing property based on the evaluation value EV obtained by the soil reducing property evaluation unit 123. More specifically, the material amount processing unit 124 uses the material amount conversion information stored in the conversion information storage unit 136 to use each sub of the reducibility evaluation map EVm stored in the reducibility evaluation information storage unit 133. Each evaluation value EV (SAR) associated with the area SAR is converted into a material quantity MV (SAR). As a result, a material quantity map MVm to which a material quantity MV (SAR) is assigned for each sub-region SAR is created. Then, the material amount processing unit 124 stores the obtained material amount map MVm in the material amount information storage unit 134 in association with the position Pap associated with the reducibility evaluation map EVm of the field.

Next, the operation of the soil condition evaluation system S (heat distribution image generation device M, soil condition evaluation device P) in the present embodiment will be described. FIG. 4 is a flowchart showing the operation of the soil condition evaluation device of the soil condition evaluation system. FIG. 5 is a schematic view showing a temperature distribution image of a field as an example. FIG. 6 is a diagram showing an evaluation value map obtained based on the temperature distribution image of the field schematically shown in FIG. FIG. 7 is a diagram showing a material amount map obtained based on the evaluation value map shown in FIG.

In such a soil condition evaluation system S, first, when the power is turned on, the heat distribution image generation device M and the soil condition evaluation device P respectively execute necessary initialization of each part and start their operation. In the soil condition evaluation device P, by executing the control processing program, the control processing unit 12 is functionally configured with the control unit 121, the field temperature processing unit 122, the soil reducibility evaluation unit 123, and the material amount processing unit 124. To.

The heat distribution image generator M flies under the control of the control unit 23 by guided flight or autonomous flight, images the field AR to be evaluated from the sky, positions the field AR by GPS 21 in synchronization with the imaging, and the temperature measurement unit 22 performs positioning. Measure the temperature. Then, the heat distribution image generation device M is generated by imaging the positioning result Pap and the measurement result temperature Ts obtained by the GPS 21, the temperature measurement unit 22, and the heat distribution image generation unit 24, respectively, by the control unit 23. The heat distribution image SP (not shown) is transmitted from the communication IF unit 26 to the soil condition evaluation device P as a communication signal.

In FIG. 4, the soil condition evaluation device P uses the communication IF unit 11 to obtain the positioning result Pap (position Pap), the measurement result air temperature Ts (field air temperature Ts), and the field heat distribution image SP from the heat distribution image generator M. When it is received and acquired, the acquired position Pap, the air temperature Ts of the field, and the heat distribution image SP of the field are associated with each other and stored in the heat distribution information storage unit 131 of the storage unit 13 (S11), and the control processing unit 12 causes the control processing unit 12. , Acquire the evaluation condition (S12). For this evaluation condition, for example, after the operation of the soil condition evaluation device P, the input unit 14 may receive the input of the evaluation condition, store it in the storage unit 13, and acquire the evaluation condition stored in the storage unit 13. Further, for example, the evaluation conditions may be obtained by receiving the input of the evaluation conditions in the input unit 14 when the position Pap, the air temperature Ts of the field, and the heat distribution image SP of the field are acquired from the heat distribution image generator M. good. The input operation of this evaluation condition may be executed at predetermined time intervals (for example, every 30 minutes, every hour, every two hours, etc.). In the present embodiment, the weather and time are input from the input unit 14 as one of the evaluation conditions. On the other hand, the air temperature Ts in the field is also received by the communication IF unit 11 as another evaluation condition as described above.

Next, the soil condition evaluation device P obtains the temperature Tar of the field based on the heat distribution image SP of the field by the field temperature processing unit 122 of the control processing unit 12, obtains the temperature distribution image Tarp of the field, and stores it. (S13). More specifically, the field temperature processing unit 122 uses the temperature conversion information stored in the conversion information storage unit 136 to obtain a pixel value of each pixel in the heat distribution image SP of the field acquired in the processing S11. By converting to a temperature according to the above, an image (temperature distribution image) Tarp showing the temperature distribution of the field is obtained. Then, the field temperature processing unit 122 stores the obtained temperature distribution image Tarp in the temperature distribution information storage unit 132 in association with the position Pap and the air temperature Ts acquired in the processing S11.

Next, the soil condition evaluation device P obtains an evaluation value EV by the soil reducibility evaluation unit 123 of the control processing unit 12 (S14). More specifically, the soil reducibility evaluation unit 123 determines the difference between the temperature distribution image Tarp of the field obtained by the field temperature treatment unit 122 in the treatment S13 and the temperature Ts of the field obtained in the treatment S11. Based on this, the evaluation value EV of the field is obtained in multiple stages. More specifically, the soil reducibility evaluation unit 123 obtains a representative value of the temperature Tar of the sub-region SAR for each of the plurality of sub-regions SARs that divide the field AR from the temperature distribution image Tarp of the field obtained in the treatment S13. The difference ΔT between the obtained representative value temperature Tar and the temperature Ts of the field was obtained, and this difference ΔT was evaluated using the evaluation material conversion information table CT stored in the conversion information storage unit 136. Convert to EV (SAR). As a result, the reducibility evaluation map EVm is created.

Next, the soil condition evaluation device P determines whether or not the received evaluation condition satisfies the set evaluation condition stored in the set evaluation condition information storage unit 135 by the soil reducibility evaluation unit 123 (S15). As a result of this determination, when the evaluation condition satisfies the set evaluation condition (Yes), the soil reducibility evaluation unit 123 sets the evaluation value EV obtained in the treatment S14 as the finally obtained evaluation value EV. When the evaluation condition does not satisfy the set evaluation condition (No), the soil reducibility evaluation unit 123 does not use the evaluation value EV obtained in the treatment S14 as an error and finally obtain the evaluation value EV. More specifically, the soil reducibility evaluation unit 123 determines whether or not the temperature Ts of the field acquired in the treatment S11 is equal to or higher than the predetermined temperature Th, and the weather received in the treatment S12 is fine or sunny. It is determined whether or not the time received in the process S12 is from 9:00 to 15:00. As a result of this determination, the soil reducibility evaluation unit 123 found that the temperature Ts of the field acquired in the treatment S11 was equal to or higher than the predetermined temperature Th, and the weather received in the treatment S12 was fine or sunny. When the time received in the process S12 is from 9:00 to 15:00, it is determined that the evaluation condition satisfies the set evaluation condition (Yes), and the soil reducibility evaluation unit 123 determines the evaluation value obtained in the process S14. Let EV be the finally obtained evaluation value EV. On the other hand, as a result of the determination, the soil reducibility evaluation unit 123 found that the temperature Ts of the field acquired in the treatment S11 was not equal to or higher than the predetermined temperature Th, or the weather received in the treatment S12 was not fine or sunny. When the time received in the process S12 is not from 9:00 to 15:00 (that is, the temperature Ts of the field acquired in the process S11 is equal to or higher than the predetermined temperature Th, or the weather received in the process S12 is fine or sunny. When the weather is fine and when any one of the times received in the process S12 is from 9:00 to 15:00 is not satisfied), the evaluation condition does not satisfy the set evaluation condition (No. ), The soil reducibility evaluation unit 123 does not use the evaluation value EV obtained in the treatment S14 as an error and finally obtain the evaluation value EV.

Next, the soil condition evaluation device P applies the evaluation value EV (reducibility evaluation map EVm in the present embodiment) obtained in the treatment S14 by the soil reducibility evaluation unit 123 to the determination result of the treatment S15 and the treatment S11. It is stored in the reducibility evaluation information storage unit 133 in association with the acquired position Pap and temperature Ts (S16).

Next, the soil condition evaluation device P uses the material amount processing unit 124 of the control processing unit 12 to improve the reducing property based on the evaluation value EV obtained by the soil reducing property evaluation unit 123. MV is obtained and stored (S17). More specifically, the material amount processing unit 124 associates the material amount conversion information stored in the conversion information storage unit 136 with each sub-region SAR of the reducibility evaluation map EVm obtained in the process S14. Each evaluated value EV (SAR) is converted into a material amount MV (SAR). Then, the material amount processing unit 124 stores the obtained material amount map MVm in the material amount information storage unit 134 in association with the position pap acquired in the process S11.

Then, the soil condition evaluation device P outputs the evaluation value EV and the material amount MV for the field AR to be evaluated from the output unit 15 by the control processing unit 12 (S18), and ends the processing. More specifically, the control processing unit 12 outputs the reducing property evaluation map EVm obtained in the processing S14 and the material amount map MVm in the processing S16 from the output unit 15 according to the determination result of the processing S15. More specifically, for example, in the control processing unit 12, the evaluation value EV (the present embodiment) in which the determination result of the processing S15 is finally obtained from the evaluation value EV (reducibility evaluation map EVm in the present embodiment) obtained in the processing S14. In the case of the reducibility evaluation map EVm) in the form, the reducibility evaluation map EVm obtained in the process S14 and the material amount map MVm are output from the output unit 15 in the process S16, and the control process unit 12 outputs the determination result of the process S15. If is an error, the setting evaluation condition is not satisfied, and the output unit 15 outputs that the error occurs. If the determination result of the process S15 is an error, the control processing unit 12 outputs from the output unit 15 that the setting evaluation condition is not satisfied and an error occurs, and as reference information, the reducibility obtained in the process S14. The material amount map MVm may be output from the output unit 15 in the evaluation map EVm and the process S16.

For example, the temperature distribution image Tarp shown in FIG. 5 is obtained by the process S13 by converting the pixel value of each pixel from the heat distribution image SP in the field AR to be evaluated by using the temperature conversion information. In the process S14, the representative value of the temperature Tar of the sub-region SAR is obtained for each sub-region SAR of the temperature distribution image Tarp shown in FIG. 5, and the representative value of the temperature Tar of the sub-region SAR is evaluated as the evaluation material conversion information table. By converting using CT, the reducibility evaluation map EVm shown in FIG. 6 can be obtained. Then, in the process S17, for each sub-region SAR of the reducibility evaluation map EVm shown in FIG. 6, the evaluation value EV (SAR) of the sub-region SAR is converted by using the evaluation material conversion information table CT. The material amount map MVm shown in 7 is obtained.

Then, the soil condition evaluation device P receives a communication signal containing the positioning result Pap (position Pap), the measurement result air temperature Ts (field air temperature Ts), and the field heat distribution image SP from the heat distribution image generation device M. Each time, the above-mentioned processes S11 to S18 are executed. When a plurality of reducibility evaluation maps EVm (Par) corresponding to each position Pap are connected by such an operation, the plurality of reducibility evaluation maps EVm (Par) are combined with the plurality of reducibility evaluation maps EVm. (Par) Connected based on each position Pap corresponding to each. For example, for each of the plurality of reducibility evaluation maps EVm (Par), the position on the heat distribution image SP corresponding to the position Pap from the imaging direction (optical axis direction) of the heat distribution image generation unit 24, that is, the reducibility evaluation. The position on the map EVm (Par) is obtained, and the reducibility evaluation is performed from the angle of view, the position Pap of the heat distribution image generation unit 24, and the reducibility evaluation map EVm (Par) corresponding to the position Pap. The position of the peripheral part of the map EVm (Par) is obtained. Based on each position of each peripheral portion of each reducibility evaluation map EVm (Par) thus obtained, the positional relationship between these reducibility evaluation maps EVm (Par) is obtained, and each reducibility evaluation map is obtained. EVm (Par) is connected. When connecting a plurality of material amount maps MVm (Par) corresponding to each position pap, a plurality of material amount maps MVm (Par) can be connected by the same processing as the above-mentioned processing for connecting a plurality of reducibility evaluation maps EVm. Par) is connected based on each position Pap corresponding to each of these plurality of material amount maps MVm (Par).

As described above, the soil condition evaluation system S, the soil condition evaluation device P, and the soil condition evaluation method and the soil condition evaluation program implemented therein include the field heat distribution image SP and the field temperature Ts. Since the evaluation value EV indicating the degree of reducibility of the field AR to be evaluated in the soil is obtained based on the above, it is not necessary to sample the sample from the soil, and the heat distribution image SP can be obtained by, for example, a heat distribution image generator or the like. Since a relatively wide range can be obtained at one time, the degree of reducibility can be evaluated more efficiently.

From the above-mentioned reduction failure process, the greater the difference between the temperature Tar of the field and the temperature Ts of the field, the greater the degree of reducing property. The soil condition evaluation system S, the soil condition evaluation device P, the soil condition evaluation method, and the soil condition evaluation program increase the evaluation value EV based on the difference ΔT between the temperature Tar of the field and the temperature Ts of the field. Since it is obtained in stages, an appropriate evaluation value EV can be obtained.

Since the above-mentioned soil condition evaluation system S, soil condition evaluation device P, soil condition evaluation method, and soil condition evaluation program include an evaluation in which the evaluation value EV indicates the presence or absence of reduction failure, the presence or absence of reduction failure is determined. It can be obtained, and it is possible to know whether or not a reduction disorder has occurred.

From the above-mentioned reduction failure process, the degree of reducing property can be suitably evaluated in the case of relatively high temperature or in fine weather. In the soil condition evaluation system S, the soil condition evaluation device P, the soil condition evaluation method, and the soil condition evaluation program, the evaluation conditions accepted by the soil reducibility evaluation unit 123 are set and stored in the evaluation condition information storage unit 135. When the evaluation condition is satisfied, the final evaluation value EV is obtained, so that a more appropriate evaluation value EV can be obtained.

The soil condition evaluation system S, the soil condition evaluation device P, the soil condition evaluation method, and the soil condition evaluation program are one of the setting evaluation conditions that the acquired temperature Ts of the field is equal to or higher than a predetermined temperature Th. Therefore, a more appropriate evaluation value can be obtained in view of the above-mentioned reduction disorder process.

The soil condition evaluation system S, the soil condition evaluation device P, the soil condition evaluation method, and the soil condition evaluation program have one of the setting evaluation conditions that the weather is fine or sunny and the time is from 9:00 to 15:00. Therefore, a more appropriate evaluation value can be obtained in view of the above-mentioned reduction disorder process.

Since the soil condition evaluation system S, the soil condition evaluation device P, the soil condition evaluation method, and the soil condition evaluation program obtain evaluation values for each of the plurality of sub-regions, the two-dimensional spatial resolution can be improved, and the two-dimensional spatial resolution can be improved in some places in the field. The degree of reducing property generated can be evaluated.

When the degree of reducing property deteriorates, a material for improving the reducing property, such as lime nitrogen, is supplied to the field AR in preparation for the growth of the next crop. In the past, when a reduction disorder occurred, the degree of reducing property was unknown, so a uniform amount of material was supplied to the entire field AR. Since the soil condition evaluation system S, the soil condition evaluation device P, the soil condition evaluation method, and the soil condition evaluation program obtain the amount MV of the material based on the evaluation value EV, the material can be supplied to the field AR in a more appropriate amount. .. As a result, the amount MV of the material can be reduced as compared with the case where the material is supplied to the field AR in a uniform amount, so that the cost can be reduced and the cost effectiveness can be improved. In particular, when the evaluation value EV (SAR) is obtained for each of the plurality of sub-regions SAR, the amount of material MV (SAR) is obtained for each of the plurality of sub-regions SARs, so that the degree of reducibility is determined. Since the material can be supplied to each sub-region SAR according to the above, the material can be supplied to the field AR more efficiently.

In the above-described embodiment, the amount of material is obtained regardless of whether or not the setting evaluation condition is satisfied, but the amount of material may be obtained only when the setting evaluation condition is satisfied. That is, if the set evaluation condition is not satisfied, the execution of the process S17 for obtaining and storing the amount of material is skipped.

Further, in the above-described embodiment, the soil condition evaluation device P acquires the heat distribution image SP from the heat distribution image generation device M by wireless communication, but the heat distribution image generation device M and the soil condition evaluation device P are connected by a cable. The soil condition evaluation device P may acquire the heat distribution image SP from the heat distribution image generation device M via the cable, which is connected to each other so that data can be exchanged with each other. In this case, the heat distribution image acquisition unit is an interface unit that receives the heat distribution image SP in the field to be evaluated by wire from the heat distribution image generation device M. Further, the soil condition evaluation device P may acquire the heat distribution image SP from the server device that stores and manages the heat distribution image SP via the communication line. In this case, the heat distribution image acquisition unit is a communication interface unit that receives the heat distribution image SP from the server device that stores and manages the heat distribution image SP in the field AR to be evaluated via a communication line. Further, the soil condition evaluation device P may acquire the heat distribution image SP from the recording medium on which the heat distribution image SP is recorded. In this case, the heat distribution image acquisition unit reads the heat distribution image SP from the recording medium on which the heat distribution image SP in the field AR to be evaluated is recorded (for example, an HDD drive device or a CD) according to the storage medium. -ROM drive device, etc.). Alternatively, when the recording medium is a USB memory or the like, the heat distribution image acquisition unit is a USB (Universal Serial Bus) interface unit.

As described above, this specification discloses various aspects of technology, of which the main technologies are summarized below.

The soil condition evaluation device according to one aspect is acquired by a heat distribution image acquisition unit that acquires a heat distribution image in the field to be evaluated, a field temperature acquisition unit that acquires the air temperature of the field, and the heat distribution image acquisition unit. The soil reducibility evaluation unit is provided to obtain an evaluation value indicating the degree of reducibility in the soil of the field based on the heat distribution image of the field and the air temperature of the field acquired by the field temperature acquisition unit. Preferably, in the above-mentioned soil condition evaluation device, the heat distribution image acquisition unit captures infrared rays radiated from the field to be evaluated and generates a heat distribution image (thermogram) showing the heat distribution as a diagram. It is a distribution image generator (thermograph, infrared camera). Further, preferably, in the above-mentioned soil condition evaluation device, the heat distribution image acquisition unit is an interface unit that receives the heat distribution image of the field to be evaluated by wire from the heat distribution image generation device. Further, preferably, in the above-mentioned soil condition evaluation device, the heat distribution image acquisition unit wirelessly receives a heat distribution image of the field to be evaluated from the heat distribution image generation device (for example, a communication card or the like). Is. Further, preferably, in the above-mentioned soil condition evaluation device, the heat distribution image acquisition unit receives the heat distribution image from a server device that stores and manages the heat distribution image in the field to be evaluated via a communication line. It is a department. Further, preferably, in the above-mentioned soil condition evaluation device, the heat distribution image acquisition unit is a storage device (for example,) corresponding to the storage medium that reads the heat distribution image from the recording medium on which the heat distribution image in the field to be evaluated is recorded. HDD drive device, CD-ROM drive device, etc.).

The so-called reduction disorder is considered to be caused by the following process. That is, when hydrogen sulfide or organic acid is generated in soil in a field such as a paddy field, root elongation and activity in a crop such as rice are inhibited, and as a result, the growth of the crop is suppressed and the water content of the crop is sucked up. Ability weakens. Therefore, for example, in a relatively hot summer season, when the temperature rises, water is not carried to the entire crop and the amount of transpiration from the stomata decreases. As a result, the temperature of the crop itself (corresponding to the body temperature in the case of the person concerned) is not sufficiently lowered, as in the case of heat stroke in a person, resulting in poor growth and withering. If such a reduction disorder occurs, the yield of the crop will decrease and the quality will also deteriorate.

In view of the process of such reduction disorders, the present inventor has found that the presence or absence of reduction disorders in the field correlates with the temperature of the crop.

Since the soil condition evaluation device obtains an evaluation value indicating the degree of reducibility in the soil of the field based on the heat distribution image of the field and the air temperature of the field, it is not necessary to sample a sample from the soil and heat. Since the distribution image can be obtained in a relatively wide range at one time by, for example, a heat distribution image generator or the like, the degree of reducibility can be evaluated more efficiently.

In another aspect, the above-mentioned soil condition evaluation device further includes a field temperature treatment unit for obtaining the temperature of the field based on the heat distribution image acquired by the heat distribution image acquisition unit, and evaluates the soil reducibility. The unit obtains the evaluation value in multiple stages based on the difference between the temperature of the field obtained by the field temperature processing unit and the temperature of the field acquired by the field temperature acquisition unit.

From the above-mentioned reduction failure process, the greater the difference between the temperature of the field and the temperature of the field, the greater the degree of reducing property. Since the soil condition evaluation device obtains the evaluation value in multiple stages based on the difference between the temperature of the field and the temperature of the field, an appropriate evaluation value can be obtained.

In another aspect, in these above-mentioned soil condition evaluation devices, the evaluation value includes an evaluation indicating the presence or absence of a reduction disorder.

In such a soil condition evaluation device, since the evaluation value includes an evaluation indicating the presence or absence of the reduction failure, the presence or absence of the reduction failure can be determined, and the presence or absence of the reduction failure can be known.

In another aspect, in the above-mentioned soil condition evaluation device, an evaluation condition storage unit that stores the set evaluation conditions when the evaluation value is obtained by the soil reducibility evaluation unit, and an evaluation condition reception unit that accepts evaluation conditions from the outside. Bei example a section, the soil reducing evaluation unit, when the stored setting evaluation condition is satisfied in the evaluation condition reception unit with accepted evaluation criteria the evaluation condition storage unit, obtains the evaluation value.

From the above-mentioned reduction failure process, the degree of reducing property can be suitably evaluated in the case of relatively high temperature or in fine weather. The soil condition evaluation device obtains an evaluation value when the evaluation condition received by the evaluation condition reception unit satisfies the setting evaluation condition stored in the evaluation condition storage unit, so that the soil condition evaluation device obtains a more appropriate evaluation. The value can be calculated.

In another aspect, in the above-mentioned soil condition evaluation device, the evaluation condition storage unit sets that the temperature of the field acquired by the field temperature acquisition unit is equal to or higher than a predetermined temperature. The evaluation condition reception unit includes the field temperature acquisition unit .

Such a soil condition evaluation device can obtain a more appropriate evaluation value in view of the above-mentioned reduction failure process.

In another aspect, in the above-mentioned soil condition evaluation device, the evaluation condition storage unit stores that the weather is fine or sunny and the time is from 9:00 to 15:00 as one of the setting evaluation conditions. However, the evaluation condition receiving unit is an input unit that accepts data input from the outside.

Such a soil condition evaluation device can obtain a more appropriate evaluation value in view of the above-mentioned reduction failure process.

In another aspect, in the above-mentioned soil condition evaluation device, the field to be evaluated includes a plurality of divided sub-regions, and the soil reducibility evaluation unit evaluates each of the plurality of sub-regions. Find each value.

Since such a soil condition evaluation device obtains evaluation values for each of the plurality of sub-regions, the two-dimensional spatial resolution can be improved, and the degree of reducibility generated in various places in the field can be evaluated.

In another aspect, in the above-mentioned soil condition evaluation device, a material amount processing unit for obtaining the amount of material for improving the reducing property is further provided based on the evaluation value obtained by the soil reducing property evaluation unit. Be prepared.

When the degree of reducibility deteriorates, materials for improving the reducibility, such as lime nitrogen, are supplied to the field in preparation for the growth of the next crop. In the past, when a reduction disorder occurred, the degree of reducing property was unknown, so a uniform amount of material was supplied to the entire field. Since the soil condition evaluation device obtains the amount of material based on the evaluation value, it is possible to supply the material to the field in a more appropriate amount. As a result, the amount of the material can be reduced as compared with the case where the material is supplied to the field in a uniform amount, so that the cost can be reduced and the cost effectiveness can be improved. In particular, when the evaluation value is obtained for each of the plurality of sub-regions, the amount of the material is obtained for each of the plurality of sub-regions. Since it can be supplied, the material can be supplied to the field more efficiently.

The soil condition evaluation method according to the other aspect is a heat distribution image acquisition step of acquiring a heat distribution image in the field to be evaluated, a field temperature acquisition step of acquiring the air temperature of the field, and a heat distribution image acquisition step. Based on the acquired heat distribution image of the field and the air temperature of the field acquired in the field temperature acquisition step, a soil reducibility evaluation step of obtaining an evaluation value indicating the degree of reducibility in the soil of the field is performed. Be prepared.

The soil condition evaluation program according to the other aspect includes a heat distribution image acquisition step of acquiring a heat distribution image in the field to be evaluated, a field air temperature acquisition step of acquiring the air temperature of the field, and the heat distribution image. Soil reducibility evaluation to obtain an evaluation value indicating the degree of reducibility in the soil of the field based on the heat distribution image of the field acquired in the acquisition step and the air temperature of the field acquired in the field temperature acquisition step. It is a program for executing a process.

Since such a soil condition evaluation method and a soil condition evaluation program obtain an evaluation value indicating the degree of reducibility in the soil of the field based on the heat distribution image of the field and the temperature of the field, a sample is obtained from the soil. Since it is not necessary to sample and the heat distribution image can be obtained in a relatively wide range at one time by, for example, a heat distribution image generator, the degree of reducibility can be evaluated more efficiently.

This application is based on Japanese Patent Application No. 2016-94866 filed on May 10, 2016, the contents of which are included in the present application.

In order to express the present invention, the present invention has been appropriately and sufficiently described through the embodiments with reference to the drawings above, but those skilled in the art can easily change and / or improve the above embodiments. It should be recognized that it can be done. Therefore, unless the modified or improved form implemented by a person skilled in the art is at a level that deviates from the scope of rights of the claims stated in the claims, the modified form or the improved form is the scope of rights of the claims. It is interpreted as being comprehensively included in.

According to the present invention, a soil condition evaluation device, a soil condition evaluation method, and a soil condition evaluation program can be provided.

Claims (10)

A heat distribution image acquisition unit that acquires a heat distribution image in the field to be evaluated,
A field temperature acquisition unit that acquires the temperature of the field, and a field temperature acquisition unit.
Based on the heat distribution image of the field acquired by the heat distribution image acquisition unit and the air temperature of the field acquired by the field temperature acquisition unit, an evaluation value indicating the degree of reducibility in the soil of the field is obtained. Equipped with a soil reducibility evaluation department,
Soil condition evaluation device. A field temperature processing unit for obtaining the temperature of the field based on the heat distribution image acquired by the heat distribution image acquisition unit is further provided.
The soil reducibility evaluation unit obtains the evaluation value in multiple stages based on the difference between the temperature of the field obtained by the field temperature treatment unit and the temperature of the field acquired by the field temperature acquisition unit. ,
The soil condition evaluation device according to claim 1. The evaluation value includes an evaluation indicating the presence or absence of a reduction disorder.
The soil condition evaluation device according to claim 1 or 2. An evaluation condition storage unit that stores the set evaluation conditions when the evaluation value is obtained by the soil reducing property evaluation unit, and an evaluation condition storage unit.
Bei example and an evaluation condition receiving unit that receives an evaluation condition from the outside,
The soil reducibility evaluation unit obtains the evaluation value when the evaluation conditions received by the evaluation condition reception unit satisfy the set evaluation conditions stored in the evaluation condition storage unit.
The soil condition evaluation device according to any one of claims 1 to 3. The evaluation condition storage unit stores that the temperature of the field acquired by the field temperature acquisition unit is equal to or higher than a predetermined temperature as one of the set evaluation conditions.
The evaluation condition reception unit includes the field temperature acquisition unit .
The soil condition evaluation device according to claim 4, which cites claim 2 or claim 3. The evaluation condition storage unit stores that the weather is fine or sunny and the time is from 9:00 to 15:00 as one of the set evaluation conditions.
The evaluation condition reception unit is an input unit that accepts data input from the outside.
The soil condition evaluation device according to claim 4 or 5, which cites claim 2 or 3. The field to be evaluated has a plurality of divided sub-regions.
The soil reducibility evaluation unit obtains the evaluation value for each of the plurality of subregions.
The soil condition evaluation device according to any one of claims 1 to 6. A material amount processing unit for obtaining the amount of material for improving the reducing property based on the evaluation value obtained by the soil reducing property evaluation unit is further provided.
The soil condition evaluation device according to any one of claims 1 to 7. The heat distribution image acquisition process for acquiring the heat distribution image in the field to be evaluated, and
The field temperature acquisition process for acquiring the field temperature and
Based on the heat distribution image of the field acquired in the heat distribution image acquisition step and the air temperature of the field acquired in the field temperature acquisition step, an evaluation value indicating the degree of reducibility in the soil of the field is obtained. Equipped with a soil reducibility evaluation process,
Soil condition evaluation method. On the computer
The heat distribution image acquisition process for acquiring the heat distribution image in the field to be evaluated, and
The field temperature acquisition process for acquiring the field temperature and
Based on the heat distribution image of the field acquired in the heat distribution image acquisition step and the air temperature of the field acquired in the field temperature acquisition step, an evaluation value indicating the degree of reducibility in the soil of the field is obtained. Soil condition evaluation program to carry out the soil reducibility evaluation process.

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