A multi-layer precision fertilization device for corn and its fertilization method

Abstract

This invention relates to the field of agricultural planting technology, specifically to a multi-layer precision fertilization device for corn and its fertilization method. The device includes a housing and a controller. The housing has several storage chambers for storing different raw materials and mixing chambers for preparing different fertilizers. Each storage chamber is connected to an adjacent mixing chamber. Each mixing chamber is equipped with a stirring component for stirring the raw materials. The housing is equipped with a digging component for excavating trenches of different depths and a fertilization component for releasing different fertilizers according to the trench depth. Each storage chamber has a feeding component for adding raw materials at the top. This invention has a complete structure and can effectively release fertilizer while digging trenches.

Description

Technical Field

[0001] This invention relates to the field of agricultural planting technology, specifically to a multi-layer precision fertilization device for corn and its fertilization method. Background Technology

[0002] As a crop with high fertilizer requirements, corn has a root system that is distributed in layers vertically (0-30cm), and the requirements for nutrients such as nitrogen, phosphorus, and potassium vary significantly at different growth stages. Traditional fertilization methods often involve surface application or single-layer trench application, resulting in fertilizer utilization rates of less than 35% and making it easy to cause surface volatilization or deep seepage pollution.

[0003] In existing technologies, soil is often excavated using digging devices (such as trenchers or hoes), and then fertilizer is sprayed using fertilization devices (such as backpack fertilizer pumps) to complete the fertilization of corn. Although this method can achieve the purpose of fertilization, it cannot automatically select and release fertilizer while digging trenches, resulting in low work efficiency.

[0004] In summary, addressing the problem of low operational efficiency caused by the inability of existing fertilization devices to automatically select and release fertilizer while digging trenches has become a pressing issue in this field. Therefore, it is necessary to propose a more rational multi-layer precision fertilization device and method for corn. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a multi-layer precision fertilization device for corn and its fertilization method. Through the design of the excavation component and the fertilization component, the device can effectively and automatically select and release fertilizer while excavating trenches, thereby significantly improving operational efficiency.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A multi-layer precision fertilization device for corn includes a housing and a controller. The housing has several storage chambers for storing different raw materials and mixing chambers for preparing different fertilizers. Each storage chamber is connected to an adjacent mixing chamber. Each mixing chamber is equipped with a stirring component for stirring the raw materials. The housing is equipped with a digging component for digging trenches of different depths and a fertilization component for releasing different fertilizers according to the trench depth. Each storage chamber is equipped with a feeding component for adding raw materials at the top.

[0007] The excavation assembly includes a drive chamber fixedly connected to the bottom of the housing. A rotating shaft is rotatably fitted inside the drive chamber, and several arc-shaped teeth are coaxially fixedly connected to the rotating shaft. Each arc-shaped tooth has a pusher head fixedly connected to its bottom. Several rotation openings for the pusher heads to rotate are opened on the side wall of the drive chamber. A first drive component is fixedly connected to the inner side wall of the drive chamber. A connecting rod is coaxially fixedly connected to the output shaft of the first drive component. A hinge rod is hinged to the end of the connecting rod away from the first drive component. The end of the hinge rod away from the connecting rod is hinged to the side wall of the arc-shaped teeth. A controller is used to control the operation of the first drive component, thereby driving the connecting rod to rotate.

[0008] The drive compartment is also equipped with a purging component for purging soil; the bottom of the housing is equipped with a moving component for moving the entire device.

[0009] The technical principles of the above solution are as follows:

[0010] Raw materials are added to the storage chamber and fed into the mixing chamber. The controller starts the first drive unit, and the output shaft of the first drive unit drives the connecting rod to rotate, which in turn drives the hinge rod to move. The hinge rod pulls the arc teeth and the rotating shaft to rotate, which in turn drives all the arc teeth and the push head to rotate, thereby adjusting the angle of the push head. The greater the downward tilt angle of the push head, the larger the trench dug.

[0011] After the pusher head angle is adjusted, the device moves forward by moving the component. The pusher head pushes the soil forward, causing the soil to accumulate on both sides of the pusher head. The direction of the pusher head movement will form several trenches. While digging, the mixing component will mix the raw materials in the mixing chamber. The fertilization component will release different fertilizers according to the rotation angle of the pusher head, thereby releasing the corresponding fertilizers in trenches of different depths.

[0012] The above approach has the following beneficial effects:

[0013] 1. Existing fertilization techniques often employ surface application or single-layer trenching, which leads to low fertilizer utilization and easily causes surface volatilization or deep seepage, polluting the environment. Unlike existing technologies, this invention utilizes multi-layer fertilization.

[0014] 2. In this invention, the design of the connecting rod and the hinge rod can drive the arc-shaped teeth and the push head to rotate. Then, through the transmission of the rotating shaft, the angle of all the push heads can be adjusted synchronously, thereby adjusting the digging depth of the push head. This allows the device to dig trenches of different depths, facilitating subsequent fertilization at different levels.

[0015] 3. In existing technologies, although trenches of different depths can be dug and different types of fertilizers can be sprayed, operators need to select the fertilizer based on their own experience and the depth of the trench, resulting in low fertilization efficiency and the possibility of fertilization errors due to human factors. This invention automates fertilizer selection and release while digging trenches, eliminating the need for operators to select fertilizer types. This significantly reduces the impact of human factors on fertilization operations, while improving work efficiency and reducing labor costs.

[0016] Furthermore, each mixing chamber is connected to a discharge pipe, and a control valve is connected to the connection point between the two. The discharge pipes extend to the bottom of the drive chamber. The fertilizer application component includes a gear rotatably connected to the inner wall of the drive chamber, and the gear meshes with an adjacent arc-shaped tooth. Several buttons for controlling the operation of different control valves are embedded in the inner wall of the drive chamber. A pressing rod for pressing the buttons is fixedly connected to the side wall of the gear.

[0017] Beneficial effects: When the arc-shaped teeth rotate under the drive of the hinge rod, the arc-shaped teeth will drive the gear to rotate, which in turn will drive the pressing rod to rotate. The larger the rotation angle of the arc-shaped teeth, the larger the rotation angle of the push head and the digging depth, and the larger the rotation angle of the pressing rod. At different rotation angles, the pressing rod will press different buttons, thereby controlling the opening and closing of different control valves, so that different fertilizers can be discharged into the trench through the discharge pipe.

[0018] Furthermore, the moving component includes a base, with rotating rods symmetrically rotatably engaged on both sides of the base, and rotating teeth fixedly connected to both ends of the rotating rods; tracks are symmetrically arranged on both sides of the base, and the rotating teeth are rotatably engaged with the adjacent tracks; a drive component for driving the rotating rods to rotate is provided on the base.

[0019] Beneficial effects: By controlling the rotation of the rotating rod through the drive component, the rotating teeth are driven to rotate, which in turn drives the track to rotate, thereby moving the entire device.

[0020] Furthermore, the drive assembly includes a second drive member fixedly connected to the base near the drive compartment side, a first bevel gear fixedly connected to the output shaft of the second drive member; several second bevel gears fixedly connected to the rotating rod; the first bevel gear meshes with the adjacent second bevel gear; the controller is used to control the operation of the second drive member, thereby controlling the rotation of the first bevel gear.

[0021] Beneficial effects: When the controller starts the second drive unit, the output shaft of the second drive unit will drive the first bevel gear to rotate, and the first bevel gear will drive the second bevel gear and the rotating rod to rotate, thereby driving the rotating teeth and the track to rotate.

[0022] Furthermore, the stirring assembly includes a stirring shaft that rotates within the mixing chamber, and several stirring rods are fixedly connected to the stirring shaft; the bottom of the stirring shaft penetrates the bottom wall of the mixing chamber and is fixedly connected to a third bevel gear; each of the third bevel gears meshes with a second bevel gear adjacent to it.

[0023] Beneficial effects: When the second bevel gear rotates, the third bevel gear will also rotate, which in turn drives the stirring shaft and stirring rod to rotate, thereby stirring and mixing the raw materials to prepare the corresponding fertilizer.

[0024] Furthermore, the feeding assembly includes a feeding tube communicating with the storage chamber, and a feeding cap is detachably connected to the top of the feeding tube.

[0025] Beneficial effects: Open the feeding cover and feed the raw material into the storage chamber through the feeding pipe. After the feeding is complete, lock the feeding cover and feeding pipe together to cover the storage chamber and prevent impurities from entering.

[0026] Furthermore, the purging assembly includes several fan blades, all of which are fixedly connected to the output shaft of the first drive unit.

[0027] Beneficial effects: When the first drive unit is started, the output shaft of the first drive unit will drive the fan blades to rotate, thereby generating airflow to blow away the soil around the push head, reducing soil backflow and also reducing the risk of soil entering the drive chamber and affecting the normal operation of the device.

[0028] Furthermore, the bottom walls of the storage chamber are all inclined.

[0029] Beneficial effects: The inclined bottom wall of the storage chamber can better guide the raw materials into the mixing chamber, which facilitates the subsequent stirring and mixing of the raw materials.

[0030] Furthermore, sealing sleeves are fixedly connected to both the mixing chamber and the rotating joint of the stirring shaft.

[0031] Beneficial effects: The sealing sleeve can improve the sealing of the mixing chamber and prevent raw material leakage.

[0032] Furthermore, a multi-layer precision fertilization method for corn includes the following steps:

[0033] S1, Fertilizer preparation: Open the feeding cover, add different raw materials into the storage chamber through the feeding pipe, and transport them to the mixing chamber; start the second drive unit, use the track to move the whole device to the target area, and at the same time use the stirring shaft and stirring rod to stir the various raw materials to prepare fertilizer.

[0034] S2, Trench Excavation: After the fertilizer is prepared, set the trench excavation depth; start the first drive unit, adjust the pusher angle according to the excavation depth, and insert the pusher into the soil; keep the second drive unit running, and use the tracks to drive the pusher to move and excavate the trench.

[0035] S3, Fertilizer Release: Set the specified fertilizer according to the excavation depth; while excavating the trench, use the first drive component to drive the pressing rod to rotate, press the button, open the specified control valve, and release the specified fertilizer into the trench.

[0036] Beneficial effects: This method enables fertilization during trench excavation, improving work efficiency; furthermore, by automatically adjusting the type of fertilizer according to the trench depth, it enhances both efficiency and accuracy.

[0037] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] Figure 1 This is an isometric view of the multi-layer precision fertilization device for corn according to the present invention.

[0039] Figure 2 This is a side view of the multi-layer precision fertilization device for corn according to the present invention.

[0040] Figure 3 This is a side sectional view of the multi-layer precision fertilization device for corn according to the present invention.

[0041] Figure 4 This is an isometric view of the excavation component in the multi-layer precision fertilization device for corn of the present invention.

[0042] Figure 5 This is an isometric view of the base of the multi-layer precision fertilization device for corn of the present invention.

[0043] Figure 6 This is a schematic diagram illustrating the steps of the multi-layer precision fertilization method for corn according to the present invention.

[0044] The reference numerals in the accompanying drawings of the instruction manual include: 1. Housing; 2. Storage chamber; 3. Mixing chamber; 4. Drive chamber; 5. Rotating shaft; 6. Arc-shaped gear; 7. Push head; 8. First motor; 9. Connecting rod; 10. Hinge rod; 11. Discharge pipe; 12. Control valve; 13. Gear; 14. Button; 15. Pressing rod; 16. Rotating rod; 17. Rotating gear; 18. Track; 19. Second motor; 20. First bevel gear; 21. Second bevel gear; 22. Stirring shaft; 23. Stirring rod; 24. Third bevel gear; 25. Feeding pipe; 26. Feeding cover; 27. Fan blade; 28. Sealing sleeve; 29. ​​Base. Detailed Implementation

[0045] The following detailed description illustrates the specific implementation method:

[0046] Example 1:

[0047] As attached Figures 1-5 As shown: A multi-layer precision fertilization device for corn includes a housing 1 and a controller. The housing 1 has several storage chambers 2 for storing different raw materials and mixing chambers 3 for preparing different fertilizers. Each storage chamber 2 is connected to an adjacent mixing chamber 3. Each mixing chamber 3 is equipped with a stirring component for stirring the raw materials. The housing 1 is equipped with a digging component for digging trenches of different depths and a fertilization component for releasing different fertilizers according to the trench depth. Each storage chamber 2 is equipped with a feeding component for adding raw materials at the top.

[0048] like Figure 3 and Figure 4 As shown, the excavation assembly includes a drive chamber 4 welded to the bottom of the housing 1. A rotating shaft 5 is rotatably fitted inside the drive chamber 4. Several arc-shaped teeth 6 are coaxially bolted to the rotating shaft 5. Each arc-shaped tooth 6 has a pusher head 7 bolted to its bottom. Several rotation openings for the pusher head 7 to rotate are opened on the side wall of the drive chamber 4. A first drive component is bolted to the inner side wall of the drive chamber 4. A connecting rod 9 is coaxially bolted to the output shaft of the first drive component. A hinge rod 10 is hinged to the end of the connecting rod 9 away from the first drive component. The left end of the hinge rod 10 is hinged to the side wall of the arc-shaped teeth 6. The controller is used to control the operation of the first drive component, thereby driving the connecting rod 9 to rotate.

[0049] The drive compartment 4 is also equipped with a purging component for purging soil; the bottom of the housing 1 is equipped with a moving component for moving the entire device.

[0050] The mixing chamber 3 is connected to a discharge pipe 11, and a control valve 12 is connected to the connection between the two. The discharge pipe 11 extends to the bottom of the drive chamber 4. The fertilizer application component includes a gear 13 rotatably connected to the inner wall of the drive chamber 4. The gear 13 meshes with the adjacent arc-shaped tooth 6. Several buttons 14 for controlling the operation of different control valves 12 are embedded in the inner wall of the drive chamber 4. A pressing rod 15 for pressing the button 14 is bolted to the side wall of the gear 13.

[0051] The moving component includes a base 29, with rotating rods 16 symmetrically rotated on both sides of the base 29, and rotating teeth 17 bolted to both ends of the rotating rods 16; tracks 18 are symmetrically arranged on both sides of the base 29, and the rotating teeth 17 are rotatably engaged with the adjacent tracks 18; a drive component for driving the rotating rods 16 to rotate is provided on the base 29.

[0052] The drive assembly includes a second drive member bolted to the base 29 near the drive chamber 4. A first bevel gear 20 is coaxially bolted to the output shaft of the second drive member. Several second bevel gears 21 are bolted to the rotating rod 16. The first bevel gear 20 meshes with the adjacent second bevel gear 21. The controller is used to control the operation of the second drive member, thereby controlling the rotation of the first bevel gear 20.

[0053] The stirring assembly includes a stirring shaft 22 that rotates within the mixing chamber 3, and several stirring rods 23 are bolted to the stirring shaft 22; the bottom of the stirring shaft 22 penetrates the bottom wall of the mixing chamber 3 and is bolted to a third bevel gear 24; the third bevel gear 24 meshes with the adjacent second bevel gear 21.

[0054] A sealing sleeve 28 is fixedly bonded to the joint between the mixing chamber 3 and the stirring shaft 22. The sealing sleeve 28 can improve the sealing performance of the mixing chamber 3 and prevent raw material leakage.

[0055] The feeding assembly includes a feeding pipe 25 that communicates with the storage chamber 2, and a feeding cap 26 is detachably snapped onto the top of the feeding pipe 25.

[0056] The purging assembly includes several fan blades 27, all of which are bolted to the output shaft of the first drive component.

[0057] In this embodiment, both the first driving component and the second driving component are geared motors, and are named the first motor 8 and the second motor 19, respectively.

[0058] The specific implementation process is as follows:

[0059] In the initial state, the pusher head 7 is in a horizontal position to avoid wear on the pusher head 7.

[0060] When fertilizing, first, open the feeding cover 26 and input the raw materials into the storage chamber 2 through the feeding pipe 25, and then transport them to the mixing chamber 3. After the transportation is complete, lock the feeding cover 26 and the feeding pipe 25 together to cover the storage chamber 2 and prevent impurities from entering it.

[0061] by Figure 2 For example ( Figure 2 (This is the maximum rotation angle of the pusher head 7, at which point the trench is dug the deepest.) At this time, the controller starts the first motor 8. The output shaft of the first motor 8 drives the connecting rod 9 to rotate counterclockwise, which in turn drives the hinge rod 10 to move. The hinge rod 10 then drives the arc-shaped teeth 6 and the rotating shaft 5 to rotate counterclockwise, which in turn drives all the arc-shaped teeth 6 and the pusher head 7 to rotate counterclockwise, thereby adjusting the angle of the pusher head 7. The larger the counterclockwise rotation angle of the pusher head 7, the larger the trench dug.

[0062] After the angle adjustment is completed, the second motor 19 is started by the controller. The output shaft of the second motor 19 drives the first bevel gear 20 to rotate, which in turn drives the second bevel gear 21 and the rotating rod 16 to rotate, thereby driving the rotating gear 17 and the track 18 to rotate. At the same time, the second bevel gear 21 drives the third bevel gear 24 to rotate, which in turn drives the stirring shaft 22 and the stirring rod 23 to rotate, thereby stirring and mixing the raw materials to prepare the corresponding fertilizer.

[0063] During the rotation of the arc-shaped tooth 6, the arc-shaped tooth 6 will drive the gear 13 to rotate, which in turn will drive the pressing rod 15 to rotate. The larger the rotation angle of the arc-shaped tooth 6, the larger the rotation angle of the pressing rod 15. At different rotation angles, the pressing rod 15 will press different buttons 14, triggering different buttons 14, thereby controlling the opening and closing of different control valves 12, so that different fertilizers are discharged into the ditch through the discharge pipe 11.

[0064] When the first motor 8 starts, the output shaft of the first motor 8 will drive the fan blade 27 to rotate, thereby generating airflow to blow away the soil around the push head 7, reducing soil backflow and also reducing the risk of soil entering the drive chamber 4 and affecting the normal operation of the device.

[0065] Example 2:

[0066] As attached Figure 3 As shown, unlike the above embodiments, the bottom wall of the storage cavity 2 is inclined.

[0067] The specific implementation process is as follows: the raw materials will flow from the bottom wall of the inclined storage chamber 2 to the mixing chamber 3, which facilitates the subsequent stirring and mixing of the raw materials.

[0068] Example 3:

[0069] As attached Figure 6 As shown, unlike the above embodiments, a multi-layer precision fertilization method for corn includes the following steps:

[0070] S1, Fertilizer preparation: Open the feeding cover 26, add different raw materials into the storage chamber 2 through the feeding pipe 25, and transport them to the mixing chamber 3; start the second motor 19, use the track 18 to move the whole device to the target area, and at the same time use the stirring shaft 22 and stirring rod 23 to stir the various raw materials to prepare fertilizer.

[0071] S2, trench excavation: After the fertilizer is prepared, the trench excavation depth is set; the first motor 8 is started, and the angle of the pusher head 7 is adjusted according to the excavation depth, and the pusher head 7 is inserted into the soil; the second motor 19 is kept running, and the pusher head 7 is moved by the track 18 to excavate the trench.

[0072] S3, Fertilizer Release: Set the specified fertilizer according to the excavation depth; while excavating the trench, use the first motor 8 to drive the pressing rod 15 to rotate, press the button 14, open the specified control valve 12, and release the specified fertilizer into the trench.

[0073] This method enables fertilization while digging trenches, improving work efficiency. Furthermore, it automatically adjusts the type of fertilizer based on the trench depth, further enhancing both efficiency and accuracy.

[0074] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A multi-layer precision fertilizer applicator for corn, characterized by, The utility model relates to a kind of fertilizer preparation device, including box (1) and controller, box (1) is opened with several storage cavities (2) for storing different raw materials and mixing cavity (3) for preparing different fertilizer in it, storage cavity (2) is communicated with the mixing cavity (3) adjacent to it;Mixing cavity (3) is equipped with stirring assembly for stirring raw materials in it;Box (1) is equipped with the excavating assembly for excavating different depth trench and the fertilization assembly for releasing different fertilizer according to the depth of trench;The top of storage cavity (2) is equipped with the feeding assembly for adding raw materials; Excavating assembly includes fixedly connected with the drive bin (4) of box (1) bottom, rotatingly fitted with the rotating shaft (5) in drive bin (4), the rotating shaft (5) is coaxially fixedly connected with several arc teeth (6) on it, and the bottom of arc tooth (6) is fixedly connected with the push head (7) for pushing soil;Drive bin (4) side wall is opened with several rotating ports for the rotation of push head (7);First drive part is fixedly connected with the inner side wall in drive bin (4), and the output shaft of first drive part is coaxially fixedly connected with connecting rod (9), and the end away from first drive part of connecting rod (9) is hinged with hinged rod (10), and the end away from connecting rod (9) of hinged rod (10) is hinged with the side wall of arc tooth (6);Controller is used to control the operation of first drive part, to drive connecting rod (9) to rotate in turn; Drive bin (4) is also provided with blowing assembly for blowing soil in it;Box (1) bottom is provided with the moving assembly for driving the whole device to move; Mixing cavity (3) is communicated with discharge pipe (11), and the communication place of both is communicated with control valve (12), and discharge pipe (11) extends to the bottom of drive bin (4);Fertilization assembly includes gear (13) rotatably connected to the inner side wall of drive bin (4), gear (13) is engaged with the arc tooth (6) adjacent to it;The inner side wall of drive bin (4) is embedded with several buttons (14) for controlling the operation of different control valves (12);Gear (13) side wall is fixedly connected with the pressing rod (15) for pressing button (14).

2. The corn multi-layer precision fertilizer applying device according to claim 1, wherein, Moving assembly includes base (29), and the two sides of base (29) are symmetrically rotatably fitted with rotating rod (16), and the two ends of rotating rod (16) are fixedly connected with rotating teeth (17);Base (29) two sides are symmetrically provided with track (18), and rotating teeth (17) are rotatably fitted with the track (18) adjacent to it;Base (29) is provided with the drive assembly for driving rotating rod (16) to rotate.

3. The corn multi-layer precision fertilizer applying device according to claim 2, wherein, Drive assembly includes second drive part fixedly connected with the side of base (29) close to drive bin (4), and first bevel gear (20) is coaxially fixedly connected on the output shaft of second drive part;Rotating rod (16) is fixedly connected with several second bevel gears (21);First bevel gear (20) is engaged with the second bevel gear (21) adjacent to it;Controller is used to control the operation of second drive part, to control the rotation of first bevel gear (20) in turn.

4. The corn multi-layer precision fertilizer applying device according to claim 3, wherein, The stirring assembly comprises a stirring shaft (22) rotatably connected in a mixing cavity (3), and a plurality of stirring rods (23) fixedly connected to the stirring shaft (22); the stirring shaft (22) penetrates through the bottom wall of the mixing cavity (3) and is fixedly connected with a third bevel gear (24); the third bevel gear (24) is engaged with a second bevel gear (21) adjacent thereto.

5. The corn multi-layer precision fertilizer applying device according to claim 4, wherein, The feeding assembly comprises a feeding pipe (25) communicated with the storage cavity (2), and a feeding cover (26) detachably connected to the top of the feeding pipe (25).

6. The corn multi-layer precision fertilizer applying device according to claim 5, wherein, The blowing assembly comprises a plurality of fan blades (27) fixedly connected to the output shaft of the first driving member.

7. The corn multi-layer precision fertilizer applying device according to claim 6, wherein, The bottom wall of the storage cavity (2) is inclined.

8. The corn multi-layer precision fertilizer applying device according to claim 7, wherein, The mixing cavity (3) is fixedly connected with a sealing sleeve (28) at the rotatable connection with the stirring shaft (22).

9. A method of multi-layer precision fertilization of corn, carried out using the device for multi-layer precision fertilization of corn according to any one of the preceding claims 1-8, characterized in that, The method comprises the following steps S1, fertilizer preparation: open the feeding cover (26), add different raw materials into the storage cavity (2) through the feeding pipe (25) and convey them to the mixing cavity (3); start the second driving member, move the device as a whole to the target area by using the track (18), and stir the raw materials by using the stirring shaft (22) and the stirring rods (23) to prepare the fertilizer; S2, trench digging: after the preparation of the fertilizer is completed, set the digging depth of the trench; start the first driving member, adjust the angle of the push head (7) according to the digging depth, and insert the push head (7) into the soil; keep the second driving member running, move the push head (7) by using the track (18) to dig the trench; S3, fertilizer release: set the specified fertilizer according to the digging depth; while digging the trench, rotate the pressing rod (15) by using the first driving member, press the button (14), open the specified control valve (12), and release the specified fertilizer into the trench.

Images