CN112602427A - Quantitative irrigation and fertilization device for membraneless cultivation - Google Patents
Quantitative irrigation and fertilization device for membraneless cultivation Download PDFInfo
- Publication number
- CN112602427A CN112602427A CN202011554083.0A CN202011554083A CN112602427A CN 112602427 A CN112602427 A CN 112602427A CN 202011554083 A CN202011554083 A CN 202011554083A CN 112602427 A CN112602427 A CN 112602427A
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- Prior art keywords
- fixedly connected
- driving
- plate
- fertilizer
- fertilization
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C15/00—Fertiliser distributors
- A01C15/12—Fertiliser distributors with movable parts of the receptacle
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C15/00—Fertiliser distributors
- A01C15/06—Fertiliser distributors with distributing slots, e.g. adjustable openings for dosing
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C19/00—Arrangements for driving working parts of fertilisers or seeders
- A01C19/02—Arrangements for driving working parts of fertilisers or seeders by a motor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/09—Watering arrangements making use of movable installations on wheels or the like
Abstract
The invention discloses a quantitative irrigation and fertilization device for membraneless cultivation, and relates to a fertilization device, which comprises a horizontal fixing plate, wherein supporting wheels are fixedly connected below the horizontal fixing plate in a bilateral symmetry mode, a water tank is fixedly connected to the left side above the horizontal fixing plate, a connecting upright post is fixedly connected to the right side above the horizontal fixing plate, a fertilizer box is fixedly connected to the top of the connecting upright post, a driving motor is fixedly connected to the outer side of the right side wall of the fertilizer box, a driving rotating shaft is fixedly connected to the output end of the driving motor, penetrates through the fertilizer box and is rotatably connected with the fertilizer box, a guide funnel is fixedly connected to the bottom of the fertilizer box, a cross rod is fixedly connected to the inner side of. The invention has simple structure and convenient use, is used for irrigation and fertilization of non-membrane cultivation, can directly apply solid fertilizer in the fertilization process, has relatively fixed fertilization amount in one time, can also carry out quantitative watering, more accurately ensures the irrigation amount and the fertilization amount, and has good use experience.
Description
Technical Field
The invention relates to a fertilizing device, in particular to a quantitative irrigation fertilizing device for membraneless cultivation.
Background
Irrigation, namely watering the land with water. The irrigation principle is that the irrigation quantity, the irrigation times and the irrigation time are determined according to the water requirement characteristics, the growth stage, the climate and the soil conditions of the medicinal plants, and the medicinal plants are irrigated in a proper time and in a proper amount and reasonably. The main types of the irrigation include irrigation before sowing, seedling-accelerating irrigation, growth period irrigation, winter irrigation and the like.
Fertilization refers to an agricultural technical measure of applying a fertilizer into soil or spraying the fertilizer on plants, providing nutrients required by the plants and maintaining and improving the soil fertility. The main purposes of fertilization are to increase crop yield, improve crop quality, fertilize soil and improve economic benefits, so that reasonable and scientific fertilization is one of the main means for guaranteeing grain safety and maintaining sustainable development of agriculture.
Irrigation and fertilization can go on in step under many circumstances, but partial solid-state fertilizer is direct to be applyed near the plant, guarantee fertility that can be better, avoids the fertility decline after the aquatic dilutes. In addition, the quantitative irrigation and fertilization can ensure that the plants obtain the optimal moisture condition and fertility condition. Therefore, the quantitative irrigation and fertilization device for the membraneless cultivation is provided by the technical personnel in the field, so as to solve the problems provided by the background.
Disclosure of Invention
The invention aims to provide a quantitative irrigation and fertilization device for membraneless cultivation, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a quantitative irrigation and fertilization device for membraneless cultivation comprises a horizontal fixing plate, supporting wheels are fixedly and symmetrically connected to the left and the right below the horizontal fixing plate, a water tank is fixedly connected to the left above the horizontal fixing plate, a connecting upright is fixedly connected to the right above the horizontal fixing plate, a fertilizer box is fixedly connected to the top of the connecting upright, a driving motor is fixedly connected to the outer side of the right side wall of the fertilizer box, a driving rotating shaft is fixedly connected to the output end of the driving motor, penetrates through the fertilizer box and is rotatably connected with the fertilizer box, a guide funnel is fixedly connected to the bottom of the fertilizer box, a cross rod is fixedly connected to the inner side of the fertilizer box, an anti-blocking rod is rotatably connected to the outer side of the cross rod, a rotating drive plate is fixedly; the water tank is characterized in that a rotating shaft connecting plate is fixedly connected to the right side of the water tank, a gear shaft is rotatably connected to the right side of the rotating shaft connecting plate, a driven bevel gear is fixedly connected to the top of the gear shaft, a driving bevel gear is fixedly connected to the left end of the driving rotating shaft and meshed with the driven bevel gear, a driving drive plate is fixedly connected to the bottom of the gear shaft, a distributing plate is rotatably connected to the upper portion of a horizontal fixing plate, a plurality of through distributing holes are formed in the distributing plate and matched with an outlet of a guide hopper, a driven shaft is fixedly connected to the middle portion of the upper portion of the distributing; the water tank is characterized in that a piston pump is fixedly connected to the upper portion of the horizontal fixed plate, a water inlet of the piston pump is connected with the bottom of the water tank through a pipeline, a driving transverse rod is fixedly connected to the right side of a piston rod of the piston pump, a transmission groove is fixedly connected to the right end of the driving transverse rod, a driving rotating rod is fixedly connected to the left eccentric portion of the driving bevel gear, and the driving rotating rod is matched with the transmission groove.
As a further scheme of the invention: the supporting wheel comprises a wheel plate, the bottom of the wheel plate is rotatably connected with a wheel shaft, and the outer side of the wheel shaft is rotatably connected with a rolling wheel.
As a still further scheme of the invention: the diameter of the driving bevel gear is larger than that of the driven bevel gear.
As a still further scheme of the invention: the upper portion of the rotating shaft connecting plate is fixedly connected with a guide groove, the middle portion of the driving cross rod is fixedly connected with a sliding block, and the sliding block is connected with the guide groove in a sliding mode.
As a still further scheme of the invention: and a fertilizing hole is formed above the horizontal fixing plate and penetrates through the upper part and the lower part of the horizontal fixing plate.
As a still further scheme of the invention: the driving motor is electrically connected with the power supply through the switch.
As a still further scheme of the invention: the driving plate and the driven grooved wheel form a geneva wheel mechanism.
As a still further scheme of the invention: the connection mode of the connection upright post, the fertilizer box and the horizontal fixing plate is welded connection.
As a still further scheme of the invention: the rotating shaft connecting plate is connected with the water tank through bolts.
Compared with the prior art, the invention has the beneficial effects that: the invention has simple structure and convenient use, is used for irrigation and fertilization of non-membrane cultivation, can directly apply solid fertilizer in the fertilization process, has relatively fixed fertilization amount in one time, can also carry out quantitative watering, more accurately ensures the irrigation amount and the fertilization amount, has good use experience and is worthy of popularization.
Drawings
FIG. 1 is a schematic structural view of a quantitative irrigation and fertilization device for membraneless cultivation;
FIG. 2 is a schematic structural view of a driving plate and a driven sheave of the quantitative fertigation device for membraneless cultivation;
FIG. 3 is a schematic structural view of a distributing tray of the quantitative fertigation device for membraneless cultivation;
FIG. 4 is a schematic view showing a connection structure of a rotary driving plate and a driving rod in the quantitative irrigation and fertilization device for membraneless cultivation;
FIG. 5 is a schematic view of a connection structure of a driving cross bar and a driving groove in the quantitative fertigation device for membraneless cultivation;
in the figure: 1-horizontal fixed plate, 2-supporting wheel, 201-wheel plate, 202-wheel shaft, 203-rolling wheel, 3-water tank, 4-connecting upright post, 5-fertilizer box, 6-driving motor, 7-driving rotating shaft, 8-guiding hopper, 9-cross bar, 10-anti-blocking rod, 11-rotating dial, 12-driving rod, 13-rotating shaft connecting plate, 14-gear shaft, 15-driven bevel gear, 16-driving bevel gear, 17-driving dial, 18-distributing disc, 19-distributing hole, 20-driven shaft, 21-driven sheave, 22-piston pump, 23-pipeline, 24-driving cross bar, 25-transmission groove, 26-driving rotating rod, 27-guiding groove, 28-sliding block, sliding block, 29-fertilizing holes.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The first embodiment is as follows: referring to fig. 1-5, a quantitative irrigation and fertilization device for membraneless cultivation comprises a horizontal fixing plate 1, supporting wheels 2 are symmetrically and fixedly connected to the left and the right below the horizontal fixing plate 1, a water tank 3 is fixedly connected to the left above the horizontal fixing plate 1, a connecting upright column 4 is fixedly connected to the right above the horizontal fixing plate 1, a fertilizer box 5 is fixedly connected to the top of the connecting upright column 4, a driving motor 6 is fixedly connected to the outer side of the right side wall of the fertilizer box 5, a driving rotating shaft 7 is fixedly connected to the output end of the driving motor 6, the driving rotating shaft 7 penetrates through the fertilizer box 5 and is rotatably connected with the fertilizer box 5, a guide funnel 8 is fixedly connected to the bottom of the fertilizer box 5, a cross rod 9 is fixedly connected to the inner side of the fertilizer box 5, an anti-blocking rod 10 is rotatably connected to the outer side of the cross rod, the driving rod 12 is matched with the anti-blocking rod 10;
when the anti-blocking device is used, water is filled in the water tank 3, granular fertilizer is placed in the fertilizer box 5, then the pushing device works at the position of fertilization and irrigation, the driving motor 6 is started, the driving motor 6 rotates to drive the driving rotating shaft 7 to rotate, the driving rotating shaft 7 rotates to drive the rotating driving plate 11 to rotate, the rotating driving plate 11 drives the driving rod 12 to rotate, the anti-blocking rod 10 is driven to swing, and the anti-blocking rod 10 can prevent the fertilizer from being blocked in the process of falling into the material distributing hole 19;
a rotating shaft connecting plate 13 is fixedly connected to the right side of the water tank 3, a gear shaft 14 is rotatably connected to the right side of the rotating shaft connecting plate 13, a driven bevel gear 15 is fixedly connected to the top of the gear shaft 14, a driving bevel gear 16 is fixedly connected to the left end of the driving rotating shaft 7, the driving bevel gear 16 is meshed with the driven bevel gear 15, a driving drive plate 17 is fixedly connected to the bottom of the gear shaft 14, a distributing plate 18 is rotatably connected to the upper portion of the horizontal fixing plate 1, a plurality of through distributing holes 19 are formed in the distributing plate 18, the distributing holes 19 are matched with outlets of the guide hoppers 8, a driven shaft 20 is fixedly connected to the middle portion of the upper portion of the distributing plate 18, a;
the driving bevel gear 16 rotates to drive the driven bevel gear 15 to rotate, the driven bevel gear 15 drives the distributing disc 18 to rotate through the Ma-Shi mechanism, when the distributing disc 18 rotates, the distributing hole 19 is positioned at the bottom of the guide hopper 8, fertilizer enters, when the distributing disc rotates to the left side to be matched with the fertilizing hole 29, the fertilizer falls, and the fertilizing amount is relatively fixed in the whole process;
a piston pump 22 is fixedly connected above the horizontal fixing plate 1, a water inlet of the piston pump 22 is connected with the bottom of the water tank 3 through a pipeline 23, a driving cross rod 24 is fixedly connected to the right side of a piston rod of the piston pump 22, a transmission groove 25 is fixedly connected to the right end of the driving cross rod 24, a driving rotating rod 26 is fixedly connected to the left eccentric position of the driving bevel gear 16, and the driving rotating rod 26 is matched with the transmission groove 25;
the driving bevel gear 16 also synchronously drives the driving rotating rod 26 to rotate, the driving rotating rod 26 drives the transmission groove 25 to move up and down, the transmission groove 25 drives the piston rod of the piston pump 22 to move up and down to realize relatively quantitative glue, and the using effect is good.
The supporting wheel 2 comprises a wheel plate 201, a wheel shaft 202 is rotatably connected to the bottom of the wheel plate 201, and a rolling wheel 203 is rotatably connected to the outer side of the wheel shaft 202.
The diameter of the driving bevel gear 16 is larger than that of the driven bevel gear 15.
A fertilizing hole 29 is arranged above the horizontal fixing plate 1, and the fertilizing hole 29 penetrates through the upper part and the lower part of the horizontal fixing plate 1.
The driving motor 6 is electrically connected with a power supply through a switch.
The driving dial 17 and the driven grooved wheel 21 form a geneva mechanism.
The connection mode of the connecting upright post 4, the fertilizer box 5 and the horizontal fixing plate 1 is welded connection.
The rotating shaft connecting plate 13 is connected with the water tank 3 through bolts.
Example two: this embodiment is a further improvement of the previous embodiment: the upper portion of the rotating shaft connecting plate 13 is fixedly connected with a guide groove 27, the middle portion of the driving cross rod 24 is fixedly connected with a sliding block 28, the sliding block 28 is connected with the guide groove 27 in a sliding mode, and the sliding block 28 is matched with the guide groove 27 to achieve the guiding effect.
The working principle of the invention is as follows: when the fertilizer distributor is used, water is firstly filled in the water tank 3, granular fertilizer is put in the fertilizer box 5, then the pushing device works at the position of fertilizer application and irrigation, the driving motor 6 is started, the driving motor 6 rotates to drive the driving rotating shaft 7 to rotate, the driving rotating shaft 7 rotates to drive the rotating drive plate 11 to rotate, the rotating drive plate 11 drives the driving rod 12 to rotate and then drives the anti-blocking rod 10 to swing, the anti-blocking rod 10 can prevent the fertilizer from blocking in the process of falling into the distributing hole 19, meanwhile, the driving bevel gear 16 rotates to drive the driven bevel gear 15 to rotate, the driven bevel gear 15 drives the distributing disc 18 to rotate through the Ma-shi mechanism, when the distributing hole 19 is positioned at the bottom of the guide funnel 8 in the rotating process of the distributing disc 18, the fertilizer enters, the fertilizer falls down when the fertilizer rotates to the left side to be matched with the fertilizing hole 29, the fertilizing amount is relatively fixed in, the driving rotating rod 26 drives the transmission groove 25 to move up and down, the transmission groove 25 drives the piston rod of the piston pump 22 to move up and down to realize relatively quantitative glue, and the use effect is good.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a no membrane cultivation is with quantitative irrigation fertilizer injection unit, includes horizontal fixed plate (1), horizontal fixed plate (1) below bilateral symmetry fixedly connected with supporting wheel (2), horizontal fixed plate (1) top left side fixedly connected with water tank (3), a serial communication port, horizontal fixed plate (1) top right side fixedly connected with connecting column (4), connecting column (4) top fixedly connected with can fertilizer (5), can fertilizer (5) right side wall outside fixedly connected with driving motor (6), driving motor (6) output end fixedly connected with drive pivot (7), drive pivot (7) run through can fertilizer (5) and rotate with can fertilizer (5) and be connected, can fertilizer (5) bottom fixedly connected with direction funnel (8), can fertilizer (5) inboard fixedly connected with horizontal pole (9), horizontal pole (9) outside rotates and is connected with anti-clogging pole (10), a rotary driving plate (11) is fixedly connected to the outer side of the driving rotating shaft (7), driving rods (12) are uniformly and fixedly connected to the outer side of the rotary driving plate (11), and the driving rods (12) are matched with the anti-blocking rod (10); a rotating shaft connecting plate (13) is fixedly connected to the right side of the water tank (3), a gear shaft (14) is rotatably connected to the right side of the rotating shaft connecting plate (13), a driven bevel gear (15) is fixedly connected to the top of the gear shaft (14), the left end of the driving rotating shaft (7) is fixedly connected with a driving bevel gear (16), the driving bevel gear (16) is meshed with a driven bevel gear (15), the bottom of the gear shaft (14) is fixedly connected with an active drive plate (17), a material distribution plate (18) is rotatably connected above the horizontal fixing plate (1), a plurality of through material distribution holes (19) are formed in the material distribution plate (18), the material distribution holes (19) are matched with the outlet of the guide hopper (8), the middle part above the distributing disc (18) is fixedly connected with a driven shaft (20), the top of the driven shaft (20) is fixedly connected with a driven grooved pulley (21), and the driven grooved pulley (21) is matched with the driving disc (17); horizontal fixed plate (1) top fixedly connected with piston pump (22), piston pump (22) water inlet passes through pipeline (23) and is connected with water tank (3) bottom, and piston pump (22) piston rod right side fixedly connected with drives horizontal pole (24), drives horizontal pole (24) right-hand member fixedly connected with transmission groove (25), and drive bevel gear (16) left side off-centre department fixedly connected with drive bull stick (26), drive bull stick (26) and transmission groove (25) cooperate.
2. The quantitative fertigation device for membraneless cultivation according to claim 1, wherein the support wheel (2) comprises a wheel plate (201), a wheel shaft (202) is rotatably connected to the bottom of the wheel plate (201), and a rolling wheel (203) is rotatably connected to the outer side of the wheel shaft (202).
3. The fertigation apparatus for membraneless cultivation according to claim 1, wherein the diameter of the driving bevel gear (16) is larger than that of the driven bevel gear (15).
4. The quantitative irrigation and fertilization device for membraneless cultivation according to claim 1, wherein a guide groove (27) is fixedly connected above the rotating shaft connecting plate (13), a slide block (28) is fixedly connected to the middle of the driving cross rod (24), and the slide block (28) is slidably connected with the guide groove (27).
5. The quantitative irrigation and fertilization device for membraneless cultivation according to claim 1, wherein a fertilization hole (29) is formed above the horizontal fixing plate (1), and the fertilization hole (29) penetrates through the upper and lower parts of the horizontal fixing plate (1).
6. The fertigation apparatus for membraneless cultivation according to any one of claims 1-5, wherein the driving motor (6) is electrically connected to a power supply through a switch.
7. The fertigation device for non-membrane cultivation according to claim 1, wherein the driving dial (17) and the driven sheave (21) constitute a geneva wheel mechanism.
8. The quantitative irrigation and fertilization device for membraneless cultivation according to claim 1, wherein the connection mode of the connection upright post (4), the fertilizer box (5) and the horizontal fixing plate (1) is welding connection.
9. The fertigation device for membraneless cultivation according to claim 1, wherein the rotating shaft connecting plate (13) is connected with the water tank (3) by bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011554083.0A CN112602427A (en) | 2020-12-24 | 2020-12-24 | Quantitative irrigation and fertilization device for membraneless cultivation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011554083.0A CN112602427A (en) | 2020-12-24 | 2020-12-24 | Quantitative irrigation and fertilization device for membraneless cultivation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112602427A true CN112602427A (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011554083.0A Withdrawn CN112602427A (en) | 2020-12-24 | 2020-12-24 | Quantitative irrigation and fertilization device for membraneless cultivation |
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| CN (1) | CN112602427A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070012799A1 (en) * | 2005-07-18 | 2007-01-18 | Kendall Jeffrey D | Broadcast spreader metering rate control system |
| JP2010166887A (en) * | 2009-01-26 | 2010-08-05 | Matsumoto Kiko Kk | Tending machine for track lane |
| CN107548964A (en) * | 2017-09-08 | 2018-01-09 | 广州林腾生物科技有限公司 | A kind of municipal afforestation irrigation spray integrated device |
| CN108029525A (en) * | 2017-11-30 | 2018-05-15 | 许锦翔 | One kind pours dish sewage disposal device |
| CN108124545A (en) * | 2017-12-13 | 2018-06-08 | 潘立敏 | A kind of agricultural vegetable plot fertilizing equipment |
| CN209749131U (en) * | 2019-01-16 | 2019-12-10 | 兰海燕 | automatic fertilization equipment |
| CN111264154A (en) * | 2020-03-27 | 2020-06-12 | 陈政民 | A soil quantitative fertilization device for agricultural production |
-
2020
- 2020-12-24 CN CN202011554083.0A patent/CN112602427A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070012799A1 (en) * | 2005-07-18 | 2007-01-18 | Kendall Jeffrey D | Broadcast spreader metering rate control system |
| JP2010166887A (en) * | 2009-01-26 | 2010-08-05 | Matsumoto Kiko Kk | Tending machine for track lane |
| CN107548964A (en) * | 2017-09-08 | 2018-01-09 | 广州林腾生物科技有限公司 | A kind of municipal afforestation irrigation spray integrated device |
| CN108029525A (en) * | 2017-11-30 | 2018-05-15 | 许锦翔 | One kind pours dish sewage disposal device |
| CN108124545A (en) * | 2017-12-13 | 2018-06-08 | 潘立敏 | A kind of agricultural vegetable plot fertilizing equipment |
| CN209749131U (en) * | 2019-01-16 | 2019-12-10 | 兰海燕 | automatic fertilization equipment |
| CN111264154A (en) * | 2020-03-27 | 2020-06-12 | 陈政民 | A soil quantitative fertilization device for agricultural production |
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Application publication date: 20210406 |
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