CN215601860U - Double-bin layered fertilizing and corn seeding integrated machine - Google Patents
Double-bin layered fertilizing and corn seeding integrated machine Download PDFInfo
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- CN215601860U CN215601860U CN202121389184.7U CN202121389184U CN215601860U CN 215601860 U CN215601860 U CN 215601860U CN 202121389184 U CN202121389184 U CN 202121389184U CN 215601860 U CN215601860 U CN 215601860U
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Abstract
The utility model discloses a double-bin layered fertilizing and corn seeding integrated machine, which relates to the technical field of agricultural machinery and comprises a seed box and a fertilizer box, wherein the seed box and the fertilizer box are arranged on a rack, a plurality of coulters are arranged below the rack in parallel, two fertilizer discharging pipes communicated with the fertilizer box are arranged at the rear parts of the coulters, and discharging holes of the two fertilizer discharging pipes are arranged at the rear sides of the coulters from top to bottom; seed box locates can fertilizer rear, and seed discharging pipe locates the coulter rear, and the seed discharging pipe staggered arrangement of coulter and seed box. The fertilizer box is designed into a double-bin structure, the two discharge holes communicated with the fertilizer box are designed at the rear part of the coulter, and the two discharge holes arranged at intervals can be used for respectively sowing two fertilizers at different depths in soil, so that the fertilizer efficiency can be better released; meanwhile, the seed box and the discharge pipe below the seed box are arranged behind the fertilizer box, so that the colter and the discharge pipe of the seed box are arranged in a staggered mode, fertilizer can be conveniently sown in soil on the side face of the seeds respectively, and the seeds are prevented from being burnt by the fertilizer.
Description
Technical Field
The utility model relates to the technical field of agricultural machinery, in particular to a double-bin layered fertilizing and corn seeding integrated machine.
Background
With the coming of crop cultivation seasons, the cultivated land needs to be fertilized before the sowing of various crops, so that the fertilizer plays a good role in the growth of the crops. At present, the conventional corn fertilizing and seeding machine only performs fertilizing operation on one fertilizer during field fertilizing, and in order to better improve the fertilizer utilization rate and reduce nutrient loss, a single fertilizer cannot meet the requirements of soil improvement and crop high yield, and two or more than two fertilizers are often required to be added for supplement. If two or more than two fertilizers are mixed and then applied, the fertilizers with different specific gravities can be layered in the mechanical vibration process in the fertilizing process, so that the mixing of various fertilizers is uneven, and the fertilizing effect is influenced. If a conventional machine tool is adopted, multiple fertilizers are applied for multiple times and then sown, and the effect of the fertilizer is influenced by turning the soil again, so that the labor amount and the labor time are increased, and time and labor are wasted. In addition, researches find that the fertilizers with different effects are respectively applied to different layers, so that the nutrient absorption of crops can be facilitated, the utilization rate of the fertilizer is further improved, and the leaching loss of nitrogen and phosphorus is reduced; therefore, the double-bin layered fertilization and seed and fertilizer simultaneous sowing is very important.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of the prior art, and provides the double-bin layered fertilization and corn seeding integrated machine, which can uniformly and hierarchically seed two fertilizers in soil, can ensure the fertilization effect by simultaneously fertilizing and seeding, can effectively shorten the working time, improve the working efficiency and reduce the labor amount.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
a double-bin layered fertilizing and corn seeding integrated machine comprises a rack which can be connected with traction equipment, wherein a fertilizer box and a seed box are arranged on the rack, and the fertilizer box is of a double-bin structure; a plurality of coulters for turning the soil are arranged below the rack in parallel, two fertilizer discharging pipes which are respectively communicated with two storage bins in the fertilizer box are arranged at the rear parts of the coulters, and discharging holes of the two fertilizer discharging pipes are arranged at the rear sides of the coulters from top to bottom; the seed box is arranged behind the fertilizer box, a plurality of seed discharging pipes of the seed box are arranged behind the coulter, and the coulter and the seed discharging pipes of the seed box are arranged in a staggered mode; the export of seed discharging pipe corresponds in the direction of height and sets up between the export of two fertilizer discharging pipes, and the export correspondence of two fertilizer discharging pipes sets up in the export both sides of seed discharging pipe.
Preferably, two rows of discharge holes are arranged at the bottom of the fertilizer box in parallel, a plurality of discharge holes are formed in each row, and the discharge holes are arranged at the bottom of the fertilizer box at intervals; two rows of discharge holes of the fertilizer box are correspondingly provided with two adjusting plates for adjusting the discharge amount of the fertilizer; and a discharge port at the bottom of the seed box is provided with an adjusting mechanism for adjusting the discharge amount of the seeds.
Preferably, the adjusting plate is of a push-pull structure, and a plurality of plugging plates for plugging the discharge hole are arranged in the middle of the adjusting plate at intervals; adjusting screw of adjusting plate tip and the mount pad screw-thread fit of can fertilizer bottom, adjusting screw's the end that exposes and adjust knob screw-thread fit, adjust knob sets up in the outside of can fertilizer.
Preferably, the adjusting screw rod is provided with a strip-shaped groove arranged along the length direction of the adjusting screw rod, and scales are arranged in the strip-shaped groove; and the adjusting screw rod is provided with a fastening nut for fixing the adjusting knob.
Preferably, the discharge mechanisms are arranged at the discharge outlets of the fertilizer boxes, each discharge mechanism comprises a material containing box and a plurality of impellers, the impellers are arranged in the material containing boxes, and the material containing boxes are arranged corresponding to the discharge outlets at the bottoms of the fertilizer boxes; the impellers are fixed on the rotating shafts at intervals, the two rotating shafts are parallel, and the two rotating shafts respectively penetrate through the bottom of the fertilizer box; the rotating shaft is driven by a power mechanism.
Preferably, the power mechanism comprises a driving wheel, a driven wheel and driving wheels, the driving wheel is coaxially fixed with a rotating shaft of the wheel, the driven wheel is sleeved on a middle shaft in the middle of the rack, the two driving wheels are respectively sleeved at one end of the rotating shaft of the fertilizer box, the driving wheel is connected with the driven wheel through a chain, the driven wheel is connected with one driving wheel through a chain, and the two driving wheels are connected through a chain.
Preferably, the coulter is connected with the rack through a telescopic mechanism; the fertilizer box bottom is equipped with two rows of fertilizer discharging pipes, the upper end of fertilizer discharging pipe links to each other with the discharge gate of fertilizer box, and front row fertilizer discharging pipe is fixed in the rear portion of coulter, and the discharge gate of back row fertilizer discharging pipe is towards the rear, and the discharge gate of front row fertilizer discharging pipe is less than the discharge gate with back row fertilizer discharging pipe.
Preferably, the telescopic mechanism is a hydraulic cylinder.
Preferably, the adjusting mechanism comprises a seed adjusting disc and a seeder, the upper end of the seed discharging pipe is connected with the discharge port at the bottom of the seed box, the lower end outlet of the seed discharging pipe is matched with the upper end inlet of the seed adjusting disc, and the lower end outlet of the seed adjusting disc is connected with the feed port of the seeder; the edge of seed adjustment dish is radially equipped with one or more seed and holds the district, the seed adjustment dish is by action wheel drive.
Preferably, the top of fertilizer box and kind of seed case all is equipped with the apron, the fertilizer box is big-end-up's hourglass hopper-shaped.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the fertilizer box is designed into a double-bin structure, the two discharge holes communicated with the fertilizer box are designed at the rear part of the coulter, and the two discharge holes arranged at intervals can be used for respectively sowing two fertilizers at different depths in soil, so that the fertilizer effect can be better released; meanwhile, the seed box and the discharge pipe below the seed box are arranged behind the fertilizer box, so that the discharge pipes of the colter and the seed box are arranged in a staggered manner, fertilizers can be respectively and conveniently sown in soil on the side surfaces of the seeds, and the seeds are prevented from being burnt by the fertilizers; and the export of seed discharging pipe corresponds to set up between the export of two fertilizer discharging pipes in the direction of height, all is equipped with the fertilizer layer respectively in the top of seed and below, fully provides fertilizer for the seed.
The utility model is particularly suitable for corn seeding.
Drawings
FIG. 1 is a schematic structural diagram of a double-bin layered fertilizing and seeding integrated machine for corn according to an embodiment of the utility model;
FIG. 2 is a schematic view of the adjustment plate mounted to the bottom of the fertilizer can of FIG. 1;
in the figure: 1-a frame, 2-a fertilizer box, 3-a seed box, 4-a coulter, 5-a fertilizer discharging pipe, 6-a seed discharging pipe, 7-an adjusting plate, 8-a fastening nut, 9-a telescopic mechanism, 10-an adjusting screw rod, 11-an adjusting knob, 12-a strip-shaped groove, 13-a driving wheel, 14-a driven wheel, 15-a driving wheel, 16-a seed adjusting disc, 17-a seeder, 18-a cover plate and 19-a clapboard.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly and completely understood, the technical solutions in the embodiments of the present invention are described below with reference to the accompanying drawings and specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1, the double-bin layered fertilization and corn seeding integrated machine provided by the embodiment of the utility model comprises a rack 1 which can be connected with a traction device, wherein a fertilizer box 2 and a seed box 3 are arranged on the rack 1, the fertilizer box 2 is of a double-bin structure, and a partition plate 19 can be arranged in the middle of the fertilizer box 2 for separating two fertilizers in the fertilizer box; a plurality of coulters 4 used for turning the soil are arranged below the rack 1 in parallel, two fertilizer discharging pipes 5 respectively communicated with two bins in the fertilizer box 2 are arranged at the rear parts of the coulters 4, and discharging holes of the two fertilizer discharging pipes 5 are arranged at the rear sides of the coulters 4 from top to bottom; the seed box 3 is arranged behind the fertilizer box 2, the plurality of seed discharge pipes 6 of the seed box 3 are arranged behind the coulter 4, and the coulter 4 and the seed discharge pipes 6 of the seed box 3 are arranged in a staggered mode; the export of seed discharging pipe corresponds in the direction of height and sets up between the export of two fertilizer discharging pipes, and the export correspondence of two fertilizer discharging pipes sets up in the export both sides of seed discharging pipe.
Compared with the prior art, the double-bin layered fertilizing and corn sowing integrated machine has the advantages of simple and compact structure and good fertilizing effect, the two rows of fertilizer discharging pipes are arranged at the bottom of the fertilizer box of the double-bin structure, the two fertilizer discharging pipes arranged on the rear side of the coulter are arranged from top to bottom, the two fertilizers can be respectively sowed at different depths in soil by utilizing the two discharging holes arranged at intervals, the fertilizer efficiency is conveniently and better released, and the phenomenon that the field soil fertilization is inconsistent due to uneven mixing of the two fertilizers is avoided; the export of seed discharging pipe corresponds to set up between the export of two fertilizer discharging pipes in the direction of height simultaneously, ensures all to be equipped with the fertilizer layer in the top of seed and below, fully provides fertilizer for the seed. According to the utility model, the seed box and the seed discharging pipe below the seed box are arranged behind the fertilizer box, so that simultaneous fertilization and sowing can be realized, the discharging pipes of the colter and the seed box are arranged in a staggered manner, fertilizer can be conveniently and respectively sown in soil on the side surface of the seed, and the seed can be prevented from being burnt by the fertilizer.
In a specific embodiment of the utility model, as shown in fig. 1 and 2, two rows of discharge ports are arranged in parallel at the bottom of the fertilizer box 2, wherein a plurality of discharge ports are arranged in two rows and a plurality of discharge ports are arranged at the bottom of the fertilizer box 2 at intervals; two adjusting plates 7 are correspondingly arranged at two rows of discharge holes of the fertilizer box 2 and are used for adjusting the discharge amount of the fertilizer; and a discharge hole at the bottom of the seed box 3 is provided with an adjusting mechanism for adjusting the discharge amount of the seeds. The discharge gate size that utilizes the regulating plate can adjust the fertilizer case, and then realizes the regulation control of fertilizer load.
In a specific embodiment of the present invention, as shown in fig. 2, the adjusting plate 7 is a push-pull type structure, and a plurality of plugging plates for plugging the discharge hole are arranged at intervals in the middle of the adjusting plate 7; adjusting screw 10 of 7 tip of regulating plate and the mount pad screw-thread fit of 2 bottoms of can fertilizer, adjusting screw 10 expose end and 11 screw-thread fit of adjust knob, adjust knob 11 sets up in the outside of can fertilizer 2. Wherein, the adjusting screw rod 10 is provided with a strip-shaped groove 12 arranged along the length direction thereof, and the strip-shaped groove 12 is internally provided with scales; and a fastening nut 8 for fixing an adjusting knob 11 is arranged on the adjusting screw rod 10. The translation amount of the adjusting plate can be realized by rotating the adjusting knob, the plugging area of the fertilizer box discharge port is adjusted by the plugging plate, the size of the discharge amount can be visually represented by means of scales on the adjusting screw rod, and then adjustment of multiple gears is realized.
Further optimizing the technical scheme, as shown in fig. 2, the discharge ports of the fertilizer boxes 2 are respectively provided with a discharge mechanism, each discharge mechanism comprises a material containing box and a plurality of impellers, the impellers are arranged in the material containing boxes, and the material containing boxes are arranged corresponding to the discharge ports at the bottoms of the fertilizer boxes; the impellers are fixed on the rotating shafts at intervals, the two rotating shafts are parallel, and the two rotating shafts respectively penetrate through the bottom of the fertilizer box; the rotating shaft is driven by a power mechanism. Through the rotation of impeller, can break up loose with fertilizer in the fertilizer case, avoid piling up the delay in fertilizer case bottom and influence the unloading speed, realize pulling down in order of fertilizer.
In an embodiment of the utility model, as shown in fig. 1, the power mechanism includes a driving wheel 13, a driven wheel 14 and two driving wheels 15, the driving wheel 13 is coaxially fixed with a rotation shaft of the wheel, the driven wheel 14 is sleeved on a middle shaft in the middle of the frame 1, the two driving wheels 15 are respectively sleeved on one end of the rotation shaft of the fertilizer box 2, the driving wheel 13 is connected with the driven wheel 14 through a chain (a chain is sleeved on a shield), the driven wheel 14 is connected with one driving wheel 15 through a chain, and the two driving wheels 15 are connected through a chain. The driving wheel and the rear wheel are coaxially fixed, and the rotating shaft and the impeller at the bottom of the fertilizer can be driven to rotate in the traveling process of the rear wheel. The power mechanism is convenient to adapt to the installation of chain wheels with different intervals by adopting chain transmission, and the tire of the driving wheel can adopt large patterns, so that the friction force can be increased. Meanwhile, the driven wheel 14 and the driving wheel 15 can be arranged in the protective cover, so that dust pollution is avoided.
In order to increase the overall firmness of the device, as shown in fig. 1, the coulter 4 is connected with the frame 1 through a telescopic mechanism 9; two rows of fertilizer discharging pipes 5 are arranged at the bottom of the fertilizer box 2, the upper end of the fertilizer discharging pipe 5 is connected with the discharging port of the fertilizer box 2, the lower end of the fertilizer discharging pipe is connected with the coulter 4, the front fertilizer discharging pipe 5 is fixed at the rear part of the coulter 4, the discharging port of the rear fertilizer discharging pipe 5 faces the rear part, and the discharging port of the front fertilizer discharging pipe 5 is lower than the discharging port of the rear fertilizer discharging pipe 5. The telescopic mechanism is a hydraulic cylinder 9, the cylinder body of the hydraulic cylinder 9 can be fixed on the rack 1 or the coulter 4, and the coulter can be upwards contracted when not in use through the hydraulic cylinder, so that transition transportation is facilitated; when the device is used, the hydraulic cylinder is started to enable the coulter to descend, and the depth of plowing and fertilizing can be achieved.
In one embodiment of the present invention, as shown in fig. 1, the adjusting mechanism comprises a seed adjusting disk 16 and a seeder 17, the upper end of the seed discharging pipe 6 is connected with the bottom discharging port of the seed box 3, the lower end outlet of the seed discharging pipe 6 is matched with the upper end inlet of the seed adjusting disk 16, and the lower end outlet of the seed adjusting disk 16 is connected with the feeding port of the seeder 17; one or more seed containing areas are radially arranged on the edge of the seed adjusting disc 16, and the seed adjusting disc 16 is driven by the driving wheel 13. In the back wheel rotation process, it is rotatory to drive the seed adjustment dish, and when the seed of seed adjustment dish held district's opening and top seed discharging pipe butt joint, the seed can fall into the seed and hold the district, and along with the rotatory seed of seed adjustment dish holds the opening in district and rotates downwards, holds the opening in district and the feed inlet butt joint of disseminator when the seed, can realize the interval seeding of seed. The size of the seed adjusting disc and the number of the seed accommodating areas are set according to actual needs.
During specific manufacturing, the fertilizer box 2 and the seed box 3 can be processed into funnel shapes with large top and small bottom, so that the fertilizer box and the seed box can frequently vibrate under the working state conveniently, and the fertilizer and seeds in the fertilizer box and the seed box can be smoothly sown.
In addition, when in specific cultivation, the cultivation depth of the coulter is 20cm, the seed discharging pipe is used for sowing seeds in the soil at a depth of 5-7cm, the fertilizer discharging pipe positioned below the seed side is used for sowing one fertilizer in the soil at a depth of 10-15cm, and the fertilizer discharging pipe positioned below the seed side is used for sowing the other fertilizer in the soil at a depth of 3-5 cm. By adopting the sowing mode, two fertilizers can be respectively sowed on two sides of the seeds and can be sowed in an upper layer and a lower layer, so that the fertilizers can be fully provided for the seeds, and the seeds can be prevented from being burnt.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a two feed bin layering fertilization maize seeding all-in-one which characterized in that: the machine comprises a rack which can be connected with traction equipment, wherein a fertilizer box and a seed box are arranged on the rack, and the fertilizer box is of a double-bin structure; a plurality of coulters for turning the soil are arranged below the rack in parallel, two fertilizer discharging pipes which are respectively communicated with two storage bins in the fertilizer box are arranged at the rear parts of the coulters, and discharging holes of the two fertilizer discharging pipes are arranged at the rear sides of the coulters from top to bottom; the seed box is arranged behind the fertilizer box, a plurality of seed discharging pipes of the seed box are arranged behind the coulter, and the coulter and the seed discharging pipes of the seed box are arranged in a staggered mode; the export of seed discharging pipe corresponds in the direction of height and sets up between the export of two fertilizer discharging pipes, and the export correspondence of two fertilizer discharging pipes sets up in the export both sides of seed discharging pipe.
2. The double-bin layered fertilizing and corn seeding all-in-one machine as claimed in claim 1, characterized in that: two rows of discharge holes are arranged at the bottom of the fertilizer box in parallel, a plurality of discharge holes are formed in the two rows of discharge holes, and the discharge holes are arranged at the bottom of the fertilizer box at intervals; two rows of discharge holes of the fertilizer box are correspondingly provided with two adjusting plates for adjusting the discharge amount of the fertilizer; and a discharge port at the bottom of the seed box is provided with an adjusting mechanism for adjusting the discharge amount of the seeds.
3. The double-bin layered fertilizing and corn seeding all-in-one machine as claimed in claim 2, characterized in that: the adjusting plate is of a push-pull type structure, and a plurality of plugging plates for plugging the discharge hole are arranged in the middle of the adjusting plate at intervals; adjusting screw of adjusting plate tip and the mount pad screw-thread fit of can fertilizer bottom, adjusting screw's the end that exposes and adjust knob screw-thread fit, adjust knob sets up in the outside of can fertilizer.
4. The double-bin layered fertilizing and corn seeding all-in-one machine as claimed in claim 3, characterized in that: the adjusting screw rod is provided with a strip-shaped groove arranged along the length direction of the adjusting screw rod, and scales are arranged in the strip-shaped groove.
5. The double-bin layered fertilizing and corn seeding all-in-one machine as claimed in claim 1, characterized in that: the discharging mechanisms are arranged at the discharging openings of the fertilizer boxes and comprise material containing boxes and impellers, the impellers are arranged in the material containing boxes, the material containing boxes are a plurality of material containing boxes, and the material containing boxes are arranged corresponding to the discharging openings at the bottoms of the fertilizer boxes; the impellers are fixed on the rotating shafts at intervals, the two rotating shafts are parallel, and the two rotating shafts respectively penetrate through the bottom of the fertilizer box; the rotating shaft is driven by a power mechanism.
6. The double-bin layered fertilizing and corn seeding all-in-one machine as claimed in claim 5, characterized in that: the power mechanism comprises a driving wheel, a driven wheel and driving wheels, the driving wheel is coaxially fixed with a rotating shaft of the wheel, the driven wheel is sleeved on a middle shaft in the middle of the rack, the two driving wheels are respectively sleeved at one end of a rotating shaft of the fertilizer box, the driving wheel is connected with the driven wheel through a chain, the driven wheel is connected with one driving wheel through a chain, and the two driving wheels are connected through a chain.
7. The double-bin layered fertilizing and corn seeding all-in-one machine as claimed in claim 2, characterized in that: the coulter is connected with the rack through a telescopic mechanism; the fertilizer box bottom is equipped with two rows of fertilizer discharging pipes, the upper end of fertilizer discharging pipe links to each other with the discharge gate of fertilizer box, and front row fertilizer discharging pipe is fixed in the rear portion of coulter, and the discharge gate of back row fertilizer discharging pipe is towards the rear, and the discharge gate of front row fertilizer discharging pipe is less than the discharge gate with back row fertilizer discharging pipe.
8. The double-bin layered fertilizing and corn seeding all-in-one machine as claimed in claim 7, characterized in that: the telescopic mechanism is a hydraulic cylinder.
9. The double-bin layered fertilizing and corn seeding all-in-one machine as claimed in claim 1, characterized in that: the adjusting mechanism comprises a seed adjusting disc and a seeder, the upper end of the seed discharging pipe is connected with a discharge port at the bottom of the seed box, the lower end outlet of the seed discharging pipe is matched with the upper end inlet of the seed adjusting disc, and the lower end outlet of the seed adjusting disc is connected with a feed port of the seeder; the edge of seed adjustment dish is radially equipped with one or more seed and holds the district, the seed adjustment dish is by action wheel drive.
10. The dual-bin layered fertilizing and seeding integrated machine as claimed in any one of claims 1 to 9, wherein: the top of fertilizer case and kind of a seed case all is equipped with the apron, the fertilizer case is big-end-up's hourglass hopper-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121389184.7U CN215601860U (en) | 2021-06-22 | 2021-06-22 | Double-bin layered fertilizing and corn seeding integrated machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121389184.7U CN215601860U (en) | 2021-06-22 | 2021-06-22 | Double-bin layered fertilizing and corn seeding integrated machine |
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| CN215601860U true CN215601860U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121389184.7U Active CN215601860U (en) | 2021-06-22 | 2021-06-22 | Double-bin layered fertilizing and corn seeding integrated machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115119574A (en) * | 2022-06-29 | 2022-09-30 | 安徽天平机械股份有限公司 | Seeder with layered fertilization function and use method |
| CN116267150A (en) * | 2023-03-27 | 2023-06-23 | 河北省农林科学院农业资源环境研究所 | Deep returning equipment and method for corn planting organic fertilizer |
-
2021
- 2021-06-22 CN CN202121389184.7U patent/CN215601860U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115119574A (en) * | 2022-06-29 | 2022-09-30 | 安徽天平机械股份有限公司 | Seeder with layered fertilization function and use method |
| CN116267150A (en) * | 2023-03-27 | 2023-06-23 | 河北省农林科学院农业资源环境研究所 | Deep returning equipment and method for corn planting organic fertilizer |
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