CN111492774A - Solid-liquid fertilizer injection unit for farming - Google Patents
Solid-liquid fertilizer injection unit for farming Download PDFInfo
- Publication number
- CN111492774A CN111492774A CN202010465614.2A CN202010465614A CN111492774A CN 111492774 A CN111492774 A CN 111492774A CN 202010465614 A CN202010465614 A CN 202010465614A CN 111492774 A CN111492774 A CN 111492774A
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- Prior art keywords
- fixedly connected
- barrel
- water storage
- fertilizer
- solid
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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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C15/00—Fertiliser distributors
- A01C15/005—Undercarriages, tanks, hoppers, stirrers specially adapted for seeders or fertiliser distributors
-
- 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
-
- 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
- A01G25/16—Control of watering
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Fertilizing (AREA)
Abstract
The invention discloses a solid-liquid fertilizer applying device for agricultural planting, which relates to the technical field of agricultural planting and comprises a base, wherein a fertilizer barrel and a water storage barrel are fixedly connected on a fixing frame, the top end of the fertilizer barrel is fixedly connected with a feed hopper, the bottom end of the fertilizer barrel is fixedly connected with a first bottom cover, the bottom end of the first bottom cover is fixedly connected with a discharge pipe, the bottom end of the water storage barrel is fixedly connected with a second bottom cover, the bottom end of the second bottom cover is fixedly connected with a water outlet pipe, a quantitative discharging mechanism is arranged in the first bottom cover, a quantitative water outlet mechanism is arranged in the second bottom cover, and a reciprocating driving mechanism is arranged between the fertilizer barrel and the water storage barrel. And can provide powerful guarantee for the growth of crops on the premise of stable discharge.
Description
Technical Field
The invention relates to the technical field of agricultural planting, in particular to a solid-liquid fertilizer applying device for agricultural planting.
Background
Agriculture is an industry for producing food and industrial raw materials by cultivating animals and plants, and belongs to the first industry, the agricultural labor objects are life animals and plants, the obtained products are the animals and plants, the approval of all departments for obtaining the products by artificial cultivation by utilizing the growth and development rules of organisms such as the animals and the plants is called agriculture in general, and the agriculture is a basic product for supporting the construction and development of national economy.
Chinese agricultural planting has a long history, and plants are often fertilized in agricultural planting to promote the growth of the plants, Chinese utility model patent document with publication number CN205584780U discloses a novel agricultural planting fertilizer applying device which is provided with a fertilizer applying device and a discharging device to uniformly scatter fertilizer on a scattering plate rotating at high speed so as to uniformly scatter the fertilizer by utilizing centrifugal force, a stirring device is arranged to better and more uniformly mix different fertilizers together, a field moving device is arranged to automatically move, the labor intensity of fertilization of people is greatly reduced, the device adopts a form of scattering and throwing out to realize uniform sowing of the fertilizer, but for crops such as corn, peanut and the like, the fertilizer does not need to be comprehensively scattered in the field, point sowing is needed, otherwise a large amount of fertilizer is wasted, the device can not carry out point type quantitative sowing and drying work.
Disclosure of Invention
The invention provides a solid-liquid fertilizer device for agricultural planting, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a solid-liquid fertilizer injection unit for farming, includes the base, and the bottom four corners of base all is equipped with removes the wheel, the top fixed connection mount of base, fixed connection fertilizer bucket and water storage bucket on the mount, the top fixed connection feeder hopper of fertilizer bucket, the first end cover of bottom fixed connection of fertilizer bucket, the bottom fixed connection discharging pipe of first end cover, the top of water storage bucket are equipped with the water inlet, the bottom fixed connection second end cover of water storage bucket, the bottom fixed connection outlet pipe of second end cover, be equipped with quantitative discharge mechanism in the first end cover, be equipped with quantitative water outlet mechanism in the second end cover, be equipped with reciprocating drive mechanism between fertilizer bucket and the water storage bucket.
As a preferable technical scheme of the invention, the reciprocating driving mechanism comprises a connecting seat fixedly arranged between the fertilizer barrel and the water storage barrel, the center of the bottom end of the connecting seat is fixedly connected with a bottom rod, the bottom rod is rotatably connected with a driving gear, one sides of the fertilizer barrel and the water storage barrel close to the driving gear are respectively connected with a first toothed bar and a second toothed bar in a sliding manner, and the first toothed bar and the second toothed bar are both meshed with the driving gear.
As a preferred technical solution of the present invention, one side of the top of the first rack bar is fixedly connected to a first top plate, a first spring is fixedly connected between the first top plate and the connecting seat, one side of the top of the second rack bar is fixedly connected to a second top plate, and a second spring is fixedly connected between the second top plate and the connecting seat.
As a preferred technical scheme of the invention, the quantitative discharging mechanism comprises a discharging hole arranged at the bottom of the first bottom cover, the bottom end of the first toothed bar is fixedly connected with a first pull rod, and the first pull rod penetrates through the discharging pipe and is fixedly connected with the plugging seat.
As a preferable technical scheme of the invention, the reciprocating driving mechanism comprises a water outlet channel arranged in the second bottom cover, the bottom end of the second toothed bar is fixedly connected with a second pull rod, the second pull rod penetrates through the water outlet pipe and is fixedly connected with a quantitative water outlet column, the quantitative water outlet column is positioned in the water outlet channel, and the outer side of the quantitative water outlet column is provided with a plurality of water storage tanks.
As a preferred technical scheme of the present invention, a first guide rail and a second guide rail are respectively fixedly disposed outside the fertilizer barrel and the water storage barrel, the first rack bar is slidably connected to the first guide rail, and the second rack bar is slidably connected to the second guide rail.
In a preferred embodiment of the present invention, the bottom of the water storage tank is inclined.
In a preferred embodiment of the present invention, the driving gear is an incomplete gear.
As a preferable technical scheme of the invention, the driving gear is coaxially and fixedly connected with a driving shaft, and the driving shaft penetrates through the bottom rod and is fixedly connected with the crank.
The invention has the following advantages: the quantitative discharge mechanism and the quantitative water outlet mechanism are arranged to realize the quantitative discharge of fertilizer and irrigation water, the reciprocating driving mechanism is arranged to drive the quantitative discharge mechanism and the quantitative water outlet mechanism to act in sequence, the fertilizer spreading and water discharging irrigation is very convenient and fast, and the growth of crops can be powerfully guaranteed on the premise of stable discharge.
Drawings
FIG. 1 is a schematic structural view of a solid-liquid fertilizer apparatus for agricultural planting.
Fig. 2 is a schematic structural diagram of a quantitative discharging mechanism in the solid-liquid fertilizer applying device for agricultural planting.
FIG. 3 is a schematic structural view of a quantitative water outlet mechanism in the solid-liquid fertilizer apparatus for agricultural planting.
FIG. 4 is a schematic structural diagram of a quantitative water outlet column in the solid-liquid fertilizer apparatus for agricultural planting.
In the figure: 1. a base; 2. a moving wheel; 3. a fixed mount; 4. a fertilizer barrel; 5. a feed hopper; 6. a first bottom cover; 7. a discharge pipe; 8. a water storage barrel; 9. a water inlet; 10. a second bottom cover; 11. a water outlet pipe; 12. a connecting seat; 13. a bottom bar; 14. a drive gear; 15. a first rack bar; 16. a first top plate; 17. a first spring; 18. a second rack bar; 19. a second top plate; 20. a second spring; 21. a first pull rod; 22. a second pull rod; 23. a plugging seat; 24. a discharge port; 25. a water outlet channel; 26. quantitatively discharging a water column; 27. a water storage tank; 28. a crank handle.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-4, a solid-liquid fertilizer applying device for agricultural planting comprises a base 1, wherein moving wheels 2 are arranged at four corners of the bottom of the base 1, a top end of the base 1 is fixedly connected with a fixing frame 3, the fixing frame 3 is fixedly connected with a fertilizer barrel 4 and a water storage barrel 8, the top end of the fertilizer barrel 4 is fixedly connected with a feed hopper 5, the bottom end of the fertilizer barrel 4 is fixedly connected with a first bottom cover 6, the bottom end of the first bottom cover 6 is fixedly connected with a discharge pipe 7, the top end of the water storage barrel 8 is provided with a water inlet 9, the bottom end of the water storage barrel 8 is fixedly connected with a second bottom cover 10, the bottom end of the second bottom cover 10 is fixedly connected with a water outlet pipe 11, a quantitative discharge mechanism is arranged in the first bottom cover 6, a quantitative water outlet mechanism is arranged in the second bottom cover 10.
Reciprocal actuating mechanism is including fixed connecting seat 12 that sets up between fertilizer bucket 4 and water storage bucket 8, bottom rod 13 of the bottom central authorities fixed connection of connecting seat 12, and bottom rod 13 rotates and connects drive gear 14, and one side that fertilizer bucket 4 and water storage bucket 8 are close to drive gear 14 is sliding connection first rack bar 15 and second rack bar 18 respectively, and first rack bar 15, second rack bar 18 all are connected with drive gear 14 meshing. The drive gear 14 is an incomplete gear. The driving gear 14 is coaxially and fixedly connected with a driving shaft, and the driving shaft penetrates through the bottom rod 13 and is fixedly connected with a crank 28.
One side of the top of the first toothed bar 15 is fixedly connected with a first top plate 16, a first spring 17 is fixedly connected between the first top plate 16 and the connecting seat 12, one side of the top of the second toothed bar 18 is fixedly connected with a second top plate 19, and a second spring 20 is fixedly connected between the second top plate 19 and the connecting seat 12.
The quantitative discharging mechanism comprises a discharging hole 24 formed in the bottom of the first bottom cover 6, the bottom end of the first toothed bar 15 is fixedly connected with a first pull rod 21, and the first pull rod 21 penetrates through the discharging pipe 7 and is fixedly connected with a plugging seat 23.
The reciprocating driving mechanism comprises a water outlet channel 25 arranged in the second bottom cover 10, the bottom end of the second toothed bar 18 is fixedly connected with a second pull rod 22, the second pull rod 22 penetrates through the water outlet pipe 11 and is fixedly connected with a quantitative water outlet column 26, the quantitative water outlet column 26 is positioned in the water outlet channel 25, and the outer side of the quantitative water outlet column 26 is provided with a plurality of water storage tanks 27. The bottom of the water storage tank 27 is inclined.
Example 2
Referring to fig. 1 to 4, the other contents of the present embodiment are the same as embodiment 1, except that: the utility model provides a solid-liquid fertilizer injection unit for farming, includes base 1, and base 1's bottom four corners all is equipped with removes wheel 2, base 1's top fixed connection mount 3, fixed connection fertilizer bucket 4 and water storage bucket 8 on the mount 3, the top fixed connection feeder hopper 5 of fertilizer bucket 4, the first end cover 6 of the bottom fixed connection of fertilizer bucket 4, the bottom fixed connection discharging pipe 7 of first end cover 6, the top of water storage bucket 8 are equipped with water inlet 9, the bottom fixed connection second end cover 10 of water storage bucket 8, the bottom fixed connection outlet pipe 11 of cover 10 at the bottom of the second, be equipped with quantitative discharge mechanism in the first end cover 6, be equipped with quantitative water outlet mechanism in the second end cover 10, be equipped with reciprocating drive mechanism between fertilizer bucket 4 and the water storage bucket 8.
Reciprocal actuating mechanism is including fixed connecting seat 12 that sets up between fertilizer bucket 4 and water storage bucket 8, bottom rod 13 of the bottom central authorities fixed connection of connecting seat 12, and bottom rod 13 rotates and connects drive gear 14, and one side that fertilizer bucket 4 and water storage bucket 8 are close to drive gear 14 is sliding connection first rack bar 15 and second rack bar 18 respectively, and first rack bar 15, second rack bar 18 all are connected with drive gear 14 meshing. The drive gear 14 is an incomplete gear. The driving gear 14 is coaxially and fixedly connected with a driving shaft, and the driving shaft penetrates through the bottom rod 13 and is fixedly connected with a crank 28.
One side of the top of the first toothed bar 15 is fixedly connected with a first top plate 16, a first spring 17 is fixedly connected between the first top plate 16 and the connecting seat 12, one side of the top of the second toothed bar 18 is fixedly connected with a second top plate 19, and a second spring 20 is fixedly connected between the second top plate 19 and the connecting seat 12.
The quantitative discharging mechanism comprises a discharging hole 24 formed in the bottom of the first bottom cover 6, the bottom end of the first toothed bar 15 is fixedly connected with a first pull rod 21, and the first pull rod 21 penetrates through the discharging pipe 7 and is fixedly connected with a plugging seat 23.
The reciprocating driving mechanism comprises a water outlet channel 25 arranged in the second bottom cover 10, the bottom end of the second toothed bar 18 is fixedly connected with a second pull rod 22, the second pull rod 22 penetrates through the water outlet pipe 11 and is fixedly connected with a quantitative water outlet column 26, the quantitative water outlet column 26 is positioned in the water outlet channel 25, and the outer side of the quantitative water outlet column 26 is provided with a plurality of water storage tanks 27. The bottom of the water storage tank 27 is inclined.
The fertilizer barrel 4 and the water storage barrel 8 are respectively and fixedly provided with a first guide rail and a second guide rail outside, the first toothed bar 15 is in sliding connection with the first guide rail, and the second toothed bar 18 is in sliding connection with the second guide rail.
In the implementation process of the invention, fertilizer particles and water are respectively loaded into the fertilizer barrel 4 and the water storage barrel 8, then the device is moved, the crank 28 is shaken to rotate the driving gear 14, the driving gear 14 rotates and is intermittently meshed with the first toothed bar 15 and the second toothed bar 18 to intermittently move downwards, under the action of the first spring 17 and the second spring 20, the blocking seat 23 and the quantitative water outlet column 26 are intermittently moved downwards and then reset, thereby realizing quantitative water discharge and discharging, and being capable of realizing fixed-point quantitative fertilizer spreading and water discharging irrigation.
The quantitative discharge mechanism and the quantitative water outlet mechanism are arranged to realize the quantitative discharge of fertilizer and irrigation water, the reciprocating driving mechanism is arranged to drive the quantitative discharge mechanism and the quantitative water outlet mechanism to act in sequence, the fertilizer spreading and water discharging irrigation is very convenient and fast, and the growth of crops can be powerfully guaranteed on the premise of stable discharge.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A solid-liquid fertilizer device for agricultural planting comprises a base (1), four corners of the bottom of the base (1) are provided with movable wheels (2), it is characterized in that the top end of the base (1) is fixedly connected with a fixed frame (3), the fixed frame (3) is fixedly connected with a fertilizer barrel (4) and a water storage barrel (8), the top end of the fertilizer barrel (4) is fixedly connected with a feed hopper (5), the bottom end of the fertilizer barrel (4) is fixedly connected with a first bottom cover (6), the bottom end of the first bottom cover (6) is fixedly connected with a discharge pipe (7), the top end of the water storage barrel (8) is provided with a water inlet (9), the bottom end of the water storage barrel (8) is fixedly connected with a second bottom cover (10), the bottom end of the second bottom cover (10) is fixedly connected with a water outlet pipe (11), a quantitative discharging mechanism is arranged in the first bottom cover (6), a quantitative water outlet mechanism is arranged in the second bottom cover (10), and a reciprocating driving mechanism is arranged between the fertilizer barrel (4) and the water storage barrel (8).
2. The solid-liquid fertilizer device for agricultural planting according to claim 1, wherein the reciprocating driving mechanism comprises a connecting seat (12) fixedly arranged between the fertilizer barrel (4) and the water storage barrel (8), the bottom center of the connecting seat (12) is fixedly connected with a bottom rod (13), the bottom rod (13) is rotatably connected with a driving gear (14), one sides of the fertilizer barrel (4) and the water storage barrel (8) close to the driving gear (14) are respectively connected with a first toothed bar (15) and a second toothed bar (18) in a sliding mode, and the first toothed bar (15) and the second toothed bar (18) are respectively connected with the driving gear (14) in a meshing mode.
3. The solid-liquid fertilizer device for agricultural planting according to claim 2, wherein a first top plate (16) is fixedly connected to one side of the top of the first rack bar (15), a first spring (17) is fixedly connected between the first top plate (16) and the connecting seat (12), a second top plate (19) is fixedly connected to one side of the top of the second rack bar (18), and a second spring (20) is fixedly connected between the second top plate (19) and the connecting seat (12).
4. The solid-liquid fertilizer device for agricultural planting according to claim 3, wherein the quantitative discharging mechanism comprises a discharging hole (24) formed in the bottom of the first bottom cover (6), the bottom end of the first toothed bar (15) is fixedly connected with a first pull rod (21), and the first pull rod (21) penetrates through the discharging pipe (7) and is fixedly connected with the plugging seat (23).
5. The solid-liquid fertilizer device for agricultural planting according to claim 3, wherein the reciprocating driving mechanism comprises a water outlet channel (25) arranged in the second bottom cover (10), the bottom end of the second rack (18) is fixedly connected with a second pull rod (22), the second pull rod (22) penetrates through the water outlet pipe (11) and is fixedly connected with a quantitative water outlet column (26), the quantitative water outlet column (26) is positioned in the water outlet channel (25), and the outer side of the quantitative water outlet column (26) is provided with a plurality of water storage tanks (27).
6. The solid-liquid fertilizer device for agricultural planting according to claim 2, wherein a first guide rail and a second guide rail are respectively fixed outside the fertilizer barrel (4) and the water storage barrel (8), the first rack bar (15) is connected with the first guide rail in a sliding manner, and the second rack bar (18) is connected with the second guide rail in a sliding manner.
7. The solid-liquid fertilizer applicator for agricultural planting according to claim 5, wherein the bottom of the water storage tank (27) is disposed obliquely.
8. The solid-liquid fertilizer applicator for agricultural planting according to claim 2, wherein the driving gear (14) is an incomplete gear.
9. The solid-liquid fertilizer apparatus for agricultural planting according to claim 2 or 8, wherein the driving gear (14) is coaxially and fixedly connected with a driving shaft, and the driving shaft passes through the bottom rod (13) and is fixedly connected with the crank (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010465614.2A CN111492774A (en) | 2020-05-28 | 2020-05-28 | Solid-liquid fertilizer injection unit for farming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010465614.2A CN111492774A (en) | 2020-05-28 | 2020-05-28 | Solid-liquid fertilizer injection unit for farming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111492774A true CN111492774A (en) | 2020-08-07 |
Family
ID=71875182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010465614.2A Withdrawn CN111492774A (en) | 2020-05-28 | 2020-05-28 | Solid-liquid fertilizer injection unit for farming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111492774A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114190144A (en) * | 2021-11-25 | 2022-03-18 | 唐山职业技术学院 | Quantitative fertilization device for agricultural planting |
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| CN104782278A (en) * | 2015-05-17 | 2015-07-22 | 长江大学 | Precise seed taking device for precise seeding machine |
| WO2015118891A1 (en) * | 2014-02-10 | 2015-08-13 | ヤンマー株式会社 | Granular body feeding device and granular body spraying device |
| CN107046867A (en) * | 2017-04-25 | 2017-08-18 | 李贤兵 | A kind of automatic sowing device |
| CN107486872A (en) * | 2017-10-09 | 2017-12-19 | 刘毅 | A kind of animal husbandry forage cutter device |
| CN107852909A (en) * | 2017-10-12 | 2018-03-30 | 王俊 | Seeder |
| CN108718564A (en) * | 2018-05-23 | 2018-11-02 | 徐州工业职业技术学院 | A kind of agricultural mechanical seeders |
| CN209299697U (en) * | 2018-11-28 | 2019-08-27 | 全南厚朴生态林业有限公司 | A kind of perforating device of seedling growth |
| CN209345561U (en) * | 2019-01-08 | 2019-09-06 | 孙超 | A kind of agricultural fertilizer flusher |
| CN209930891U (en) * | 2019-05-06 | 2020-01-14 | 浙江海洋大学 | Fertilizer discharging device for seeder |
| CN210075991U (en) * | 2019-01-10 | 2020-02-18 | 重庆雕美农业有限公司 | Automatic seeding trailer |
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2020
- 2020-05-28 CN CN202010465614.2A patent/CN111492774A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015118891A1 (en) * | 2014-02-10 | 2015-08-13 | ヤンマー株式会社 | Granular body feeding device and granular body spraying device |
| CN105979766A (en) * | 2014-02-10 | 2016-09-28 | 洋马株式会社 | Granular Body Feeding Device And Granular Body Spraying Device |
| CN104782278A (en) * | 2015-05-17 | 2015-07-22 | 长江大学 | Precise seed taking device for precise seeding machine |
| CN107046867A (en) * | 2017-04-25 | 2017-08-18 | 李贤兵 | A kind of automatic sowing device |
| CN107486872A (en) * | 2017-10-09 | 2017-12-19 | 刘毅 | A kind of animal husbandry forage cutter device |
| CN107852909A (en) * | 2017-10-12 | 2018-03-30 | 王俊 | Seeder |
| CN108718564A (en) * | 2018-05-23 | 2018-11-02 | 徐州工业职业技术学院 | A kind of agricultural mechanical seeders |
| CN209299697U (en) * | 2018-11-28 | 2019-08-27 | 全南厚朴生态林业有限公司 | A kind of perforating device of seedling growth |
| CN209345561U (en) * | 2019-01-08 | 2019-09-06 | 孙超 | A kind of agricultural fertilizer flusher |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114190144A (en) * | 2021-11-25 | 2022-03-18 | 唐山职业技术学院 | Quantitative fertilization device for agricultural planting |
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Application publication date: 20200807 |
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