A tobacco transplanting fertilizer ring applicator

Abstract

The present application relates to annular fertilizer applicator technology, used for solving the problems of difficult control of fertilizer quantity and deviation of fertilizer position during annular fertilizer application for tobacco transplanting, and specifically relates to a tobacco transplanting fertilizer annular applicator; in the present application, when the discharging cylinder of the annular fertilizer applicator is inserted into the soil, the baffle will be flipped once, so that a part of the fertilizer above the baffle falls; when the discharging cylinder is pulled out from the soil, the baffle will be flipped again; a certain amount of fertilizer will fall each time the baffle is flipped, the control of the quantity of fertilizer each time is realized, and the uniformity of the quantity of fertilizer for each tobacco plant is ensured; during manual annular fertilizer application, the position of fertilizer application is difficult to control, which can easily lead to uneven fertilizer application outside the root of the tobacco seedling and the phenomenon of seedling burning; therefore, during the fertilizer application, the discharging of the baffle flipping is annularly distributed around the root of the tobacco seedling, ensuring that the fertilizer application sites are evenly distributed around the tobacco seedling, which can be absorbed by the tobacco plant and will not cause the phenomenon of seedling burning.

Description

Technical Field

[0001] This invention relates to ring fertilizer applicator technology, specifically a ring fertilizer applicator for flue-cured tobacco transplanting. Background Technology

[0002] Flue-cured tobacco is an important economic crop in my country. To obtain high-quality tobacco leaves, tobacco seeds need to be intensively cultivated and then transplanted to the field. There are generally two methods of fertilization during tobacco transplanting: one is strip application, where fertilizer is evenly spread on the soil surface along the direction of ridging before ridging. After ridging, transplanting holes are dug at a certain plant spacing, and then the tobacco seedlings are transplanted. The second method is ring application, where ridging and holes are first dug, a small amount of soil is used to fix the tobacco seedlings in the holes, and then fertilizer is applied around the seedlings. Currently, ring application of fertilizer mainly relies on manual operation, which is labor-intensive and time-consuming, increasing labor costs. Furthermore, it is prone to errors, with inaccurate fertilizer application amounts and locations per plant, making it impossible to evenly fertilize around the seedlings. Inaccurate fertilizer amounts can lead to insufficient or excessive fertilizer in the tobacco plants, affecting development and maturity; inaccurate locations can cause fertilizer to concentrate near the tender roots of the seedlings, resulting in seedling burn.

[0003] To address the aforementioned technical problems, this application proposes a fertilizer ring applicator for flue-cured tobacco transplanting. Summary of the Invention

[0004] In this invention, when the feeding cylinder of the ring fertilizer applicator is inserted into the soil, the baffle flips once, causing some of the fertilizer above the baffle to fall. When the feeding cylinder is pulled out of the soil, the baffle flips again. Each flip of the baffle causes a certain amount of fertilizer to fall, thus controlling the amount of fertilizer applied each time. This ensures that the amount of fertilizer applied is beneficial to the growth of tobacco seedlings, avoids the accumulation of large amounts of fertilizer in the tobacco field, and prevents the tobacco leaves from becoming too large. When fertilizing the field ridges, the interval of fertilization is often difficult to control, which can easily lead to inconsistent intervals and uneven arrangement of fertilization points. Therefore, when using this ring fertilizer applicator, the fertilization interval can be controlled by adjusting the length of the scale, ensuring that the interval between two fertilization points is the same, and ensuring that the planting points on the same ridge are arranged neatly, improving production efficiency and solving the problems of difficult control of fertilizer amount and easy deviation of fertilization position.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A fertilizer ring applicator for flue-cured tobacco transplanting includes a sleeve, a storage bin at the top of the sleeve, a handle fixedly connected to the side wall of the sleeve, the handle being located below the storage bin, and a discharge cylinder fixedly connected to the bottom of the sleeve.

[0007] The feeding cylinder has multiple sets of feeding holes in a vertical direction. A bearing seat is fixedly connected to the center of each feeding hole. The bearing seats are symmetrically arranged on both sides of the feeding hole. A connecting shaft is rotatably connected to the bearing seat. A baffle is fixedly connected to the center of the connecting shaft. The baffle is rotatably connected inside the feeding hole. Helical gears are fixedly connected to both ends of the connecting shaft. A control plate is slidably connected inside the feeding cylinder. A control block is fixedly connected to the top of the control plate. A rack is provided on the outer wall of the control block. The outer wall of the control block is connected to the helical gears through the rack.

[0008] In a preferred embodiment of the present invention, a mounting base is fixedly installed at the bottom end of the sleeve near the discharge cylinder, a scale is rotatably connected inside the mounting base, a fixing base is fixedly installed on the outer wall of the sleeve, a retaining ring is fixedly connected to the outer wall of the fixing base, and an insert plate is slidably connected inside the retaining ring.

[0009] In a preferred embodiment of the present invention, a spring is fixedly connected to the top of the control plate, a limiting ring is fixedly installed on the inner wall of the feeding cylinder, the limiting ring is located directly above the control plate, the top of the spring is fixedly connected to the lower surface of the limiting ring, the limiting ring and the spring are both located within the annular area of ​​the control plate, and a bottom ring is fixedly connected to the bottom of the control plate, the width of the bottom ring being greater than that of the control plate.

[0010] In a preferred embodiment of the present invention, the control block is inclined on both sides, and the inclination angle of the control block is the same as the inclination angle of the helical gear.

[0011] In a preferred embodiment of the present invention, the scale is divided into an inner rod and an outer rod, wherein the inner rod is slidably connected to the outer rod, and the inner rod and the outer rod are connected by a damping layer. The fixing seat is located directly above the mounting seat, and the length of the fixing seat from the mounting seat is equal to the length of the outer rod.

[0012] In a preferred embodiment of the present invention, the discharge hole penetrates both the discharge cylinder and the sleeve, and the top of the discharge hole is connected to the inside of the storage bin. Multiple sets of discharge holes are equally spaced inside the discharge cylinder.

[0013] In a preferred embodiment of the present invention, the inner wall of the feeding cylinder is provided with multiple sets of grooves, and the helical gear and the control block are both located inside the grooves.

[0014] In a preferred embodiment of the present invention, the method of using the ring-shaped fertilizer applicator includes the following steps:

[0015] Step 1: After adding enough fertilizer to the storage bin, hold the handle and press down to make the sleeve drive the discharge cylinder into the soil;

[0016] Step 2: When the discharge cylinder is inserted into the soil, the annular area of ​​the discharge cylinder will squeeze the soil and cause the bottom ring on the inner side of the discharge cylinder to be squeezed and pushed upward. The bottom ring drives the control plate to move upward. The control plate drives the baffle to flip through the control block on the outside. During the flipping process, the fertilizer on the upper part of the baffle will fall down to fertilize the bottom.

[0017] Step 3: Lift the discharge cylinder upwards. The control plate will reset under the action of the spring, and at the same time, it will drive the control block to control the baffle to flip again, so that the discharge cylinder can fertilize again.

[0018] Step 4: Open the insert plate so that the scale is perpendicular to the sleeve and the end of the scale is aligned with the previous fertilizer hole, thereby controlling the spacing between the two sets of fertilizer holes.

[0019] Step 5: After fertilizing, retract the ruler and rotate it to a vertical position. Then open the insert plate so that the top of the ruler is locked in the fixing seat, completing the storage of the ruler.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, when the feeding cylinder of the ring fertilizer applicator is inserted into the soil, the baffle will flip once, causing some of the fertilizer above the baffle to fall. When the feeding cylinder is pulled out of the soil, the baffle will flip again. Each flip of the baffle will cause a certain amount of fertilizer to fall, thus controlling the amount of fertilizer applied each time. This ensures that the amount of fertilizer applied is conducive to the growth of tobacco seedlings, avoids the accumulation of large amounts of fertilizer in the tobacco field, and prevents the tobacco leaves from becoming too large. At the same time, after the fertilizer falls, several equidistant fertilization dots are formed. These equidistant fertilization dots form a ring of waste material, thus ensuring that the fertilizer is applied evenly to the roots of the tobacco seedlings.

[0022] 2. In this invention, when fertilizing the field ridges, the fertilization interval is often difficult to control, which can easily lead to inconsistent interval sizes and uneven arrangement of fertilization points. Therefore, when using this ring-shaped fertilizer applicator, the fertilization interval can be controlled by adjusting the length of the scale to ensure that the interval between two fertilization points is the same, while ensuring that the planting points on the same ridge are arranged neatly, thereby improving production efficiency. Attached Figure Description

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the scale structure of the present invention;

[0026] Figure 3 For the present invention Figure 2Enlarged structural diagram at point A in the middle;

[0027] Figure 4 This is a schematic diagram of the side cross-sectional structure of the present invention;

[0028] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B;

[0029] Figure 6 This is a schematic diagram of the baffle structure in this invention;

[0030] Figure 7 This is a schematic diagram of the material feeding cylinder structure in this invention;

[0031] Figure 8 This is a schematic diagram of the control block structure in this invention.

[0032] In the diagram: 1. Sleeve; 2. Storage bin; 3. Handle; 4. Scale; 5. Mounting base; 6. Fixing base; 7. Insert plate; 8. Snap ring; 9. Control plate; 10. Bottom ring; 11. Control block; 12. Bearing seat; 13. Baffle; 14. Connecting shaft; 15. Helical gear; 16. Spring; 17. Limit ring; 18. Discharge cylinder; 19. Discharge hole. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1:

[0035] Please see Figure 4 - Figure 8 As shown, a fertilizer ring applicator for flue-cured tobacco transplanting includes a sleeve 1, a storage bin 2 at the top of the sleeve 1, the inside of the storage bin 2 can be used to store fertilizer, the fertilizer falls into the soil along the discharge hole 19 when fertilizing, a handle 3 is fixedly connected to the side wall of the sleeve 1, the handle 3 is located below the storage bin 2, making it easy to pick up and press the sleeve 1 and the discharge cylinder 18, and the discharge cylinder 18 is fixedly connected to the bottom of the sleeve 1;

[0036] The discharge cylinder 18 has multiple sets of discharge holes 19 vertically. When the discharge cylinder 18 is inserted into the soil, its annular area pushes aside the soil and inserts itself into the soil. At this time, the discharge holes 19 can fertilize the soil. A bearing seat 12 is fixedly connected to the center of each discharge hole 19. The bearing seats 12 are symmetrically arranged on both sides of the discharge hole 19 and have a plate-like structure. A connecting shaft 14 is rotatably connected to each bearing seat 12. The connecting shaft 14 connects between two sets of bearing seats 12, and both ends of the connecting shaft 14 protrude from the outside of the bearing seats 12. A baffle 13 is fixedly connected to the center of the connecting shaft 14. The baffle 13 is circular, and its diameter is the same as the diameter of the discharge hole 19. The edges of the baffle 13 are rounded. The baffle 13 is rotatably connected inside the discharge hole 19. Both ends of the connecting shaft 14 are fixedly connected to helical gears 15. A control plate 9 is slidably connected inside the feeding cylinder 18. The control plate 9 has an annular structure. A control block 11 is fixedly connected to the top of the control plate 9. A rack is provided on the outer wall of the control block 11. The tooth spacing of the rack is the same as that of the helical gears 15. The outer wall of the control block 11 is connected to the helical gears 15 through the rack. A spring 16 is fixedly connected to the top of the control plate 9. The spring 16 fits against the inner wall of the sleeve 1 to prevent the spring 16 from pinching and damaging the tobacco seedlings. A limit ring 17 is fixedly installed on the inner wall of the feeding cylinder 18. The limit ring 17 is located directly above the control plate 9. The top of the spring 16 is fixedly connected to the lower surface of the limit ring 17. Both the limit ring 17 and the spring 16 are located within the annular area of ​​the control plate 9, allowing the tobacco seedlings to... The fertilizer is applied evenly to the outside of the tobacco seedlings by passing through the center of the sleeve 1, while avoiding contact between the fertilizer and the leaves and roots of the seedlings to prevent burning. A bottom ring 10 is fixedly connected to the bottom end of the control plate 9. When the feeding cylinder 18 is inserted into the soil, the bottom ring 10 inside the feeding cylinder 18 is pushed upward by the soil and is pushed upward. At the same time, the bottom ring 10 drives the control plate 9 to move upward. The upward movement of the control plate 9 drives the outer control block 11 to move upward. The width of the bottom ring 10 is greater than that of the control plate 9. The control block 11 is inclined on both sides. When the control block 11 moves upward, it drives the baffle 13 to flip. The inclination angle of the control block 11 is the same as the inclination angle of the helical gear 15. The discharge hole 19 passes through both the feeding cylinder 18 and the sleeve 1, and the top of the discharge hole 19 is connected to the storage bin 2. The internal structure allows fertilizer to fall from the storage bin 2 through the discharge hole 19. When the discharge cylinder 18 is fully inserted into the soil, the control block 11 rotates the baffle 13 half a turn. During the rotation, the fertilizer on the upper part of the baffle 13 falls, fertilizing the bottom. Multiple discharge holes 19 are evenly spaced inside the discharge cylinder 18 to ensure uniform fertilization. The inner wall of the discharge cylinder 18 has multiple grooves, and the helical gear 15 and the control block 11 are located inside these grooves, limiting the range of motion of the control block 11 and controlling the rotation amplitude of the helical gear 15 and the baffle 13. When the discharge cylinder 18 is lifted upward, the bottom of the control plate 9 is unrestricted, and the compressed spring 16 at the top of the control plate 9 begins to extend. The control plate 9 returns to its original position under the action of the spring 16.Simultaneously, the control block 11 controls the baffle 13 to rotate half a turn in the opposite direction, causing the baffle 13 to release some fertilizer from above again, allowing the dispensing cylinder 18 to fertilize again. During fertilization, the dispensing cylinder 18 is in the rising phase, ensuring the fertilizer is evenly distributed vertically in the soil.

[0037] Example 2:

[0038] Please see Figure 1 - Figure 3 As shown, a mounting base 5 is fixedly installed at the bottom end of the sleeve 1 near the discharge cylinder 18. A scale 4 is rotatably connected inside the mounting base 5. The scale 4 has graduations on its surface. The interval distance is controlled by the length of the scale 4. A fixing base 6 is fixedly installed on the outer wall of the sleeve 1. A retaining ring 8 is fixedly connected to the outer wall of the fixing base 6. An insert plate 7 is slidably connected inside the retaining ring 8. The scale 4 is divided into an inner rod and an outer rod. The inner rod is slidably connected in the outer rod. The inner rod and the outer rod are connected by a damping layer to prevent the inner rod from expanding or contracting due to shaking, thus ensuring that the length of the scale 4 remains unchanged. When fertilizing, the end of the scale 4 is aligned with the previous fertilization hole to control the distance between the two sets of fertilization holes. The fixing base 6 is located directly above the mounting base 5, and the distance between the fixing base 6 and the mounting base 5 is equal to the length of the outer rod, which facilitates the retraction of the scale 4. The scale 4 is placed close to the sleeve 1 for easy carrying.

[0039] Combining Embodiment 1 and Embodiment 2, the working principle is as follows:

[0040] Open the insert plate 7 so that the scale 4 is perpendicular to the sleeve 1 and the end of the scale 4 is aligned with the previous fertilizer hole, thereby controlling the spacing between the two sets of fertilizer holes. Hold the handle 3 and press down, so that the sleeve 1 drives the discharge cylinder 18 to insert into the soil. When the discharge cylinder 18 is inserted into the soil, the annular area of ​​the discharge cylinder 18 will squeeze the soil and insert into the soil. At the same time, the bottom ring 10 on the inner side of the discharge cylinder 18 is lifted by the soil and pushed upward. The bottom ring 10 drives the control plate 9 to move upward. The upward movement of the control plate 9 drives the outer control block 11 to move upward. When the control block 11 moves upward, it drives the baffle 13 to flip. When the discharge cylinder 18 is fully inserted into the soil, the control plate 13 is fully inserted into the soil. Block 11 just causes the baffle 13 to rotate half a turn. During the rotation, the fertilizer on the top of the baffle 13 will fall down to fertilize the bottom. Then the discharge cylinder 18 is lifted up. When the discharge cylinder 18 is lifted, the bottom of the control plate 9 is no longer restricted, and the compressed spring 16 at the top of the control plate 9 begins to extend. The control plate 9 is reset under the action of the spring 16. At the same time, the control block 11 controls the baffle 13 to rotate half a turn in the opposite direction again, so that the baffle 13 releases some of the fertilizer above again, so that the discharge cylinder 18 fertilizes again. During fertilization, the discharge cylinder 18 is in the rising stage, and the fertilizer can be evenly distributed in the soil in the vertical direction.

[0041] Example 3:

[0042] Please see Figure 1 - Figure 8 As shown, the method of using a ring fertilizer applicator includes the following steps:

[0043] Step 1: After adding enough fertilizer to the storage bin 2, put the sleeve 1 on the outside of the tobacco seedling, hold the handle 3 and press down, so that the sleeve 1 drives the discharge cylinder 18 to insert into the soil.

[0044] Step 2: When the discharge cylinder 18 is inserted into the soil, the annular area of ​​the discharge cylinder 18 will push the soil apart and insert into the soil. At the same time, the bottom ring 10 on the inner side of the discharge cylinder 18 is lifted by the soil and pushed upward by the pressure. The bottom ring 10 drives the control plate 9 to move upward. The upward movement of the control plate 9 drives the outer control block 11 to move upward. When the control block 11 moves upward, it drives the baffle 13 to flip. When the discharge cylinder 18 is fully inserted into the soil, the control block 11 drives the baffle 13 to flip half a turn. During the flipping process, the fertilizer on the upper part of the baffle 13 will fall down to fertilize the bottom.

[0045] Step 3: Lift the discharge cylinder 18 upwards. When the discharge cylinder 18 is lifted, the bottom of the control plate 9 is no longer restricted, and the compressed spring 16 at the top of the control plate 9 begins to extend. The control plate 9 is reset under the action of the spring 16, and at the same time, it drives the control block 11 to control the baffle 13 to flip half a turn in the opposite direction again, so that the baffle 13 releases a portion of the fertilizer above again, so that the discharge cylinder 18 can fertilize again. During fertilization, the discharge cylinder 18 is in the rising stage, and the fertilizer can be evenly distributed in the soil in the vertical direction.

[0046] Step 4: Open the insert plate 7 so that the scale 4 is set perpendicular to the sleeve 1 and the end of the scale 4 is aligned with the previous fertilizer hole, thereby controlling the spacing between the two sets of fertilizer holes, ensuring the interval of fertilization, and facilitating the growth of tobacco seedlings.

[0047] Step 5: After fertilizing, retract the ruler 4 and rotate it to a vertical position. Then open the insert plate 7 so that the top of the ruler 4 is engaged in the fixing seat 6, completing the storage of the ruler 4. Place the ruler 4 close to the sleeve 1 for easy carrying.

[0048] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0049] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A ring-applied fertilizer applicator for flue-cured tobacco transplanting, comprising a sleeve (1), a storage bin (2) disposed at the top of the sleeve (1), and a handle (3) fixedly connected to the side wall of the sleeve (1), the handle (3) being located below the storage bin (2), characterized in that, A discharge cylinder (18) is fixedly connected to the lower part of the sleeve (1); The feeding cylinder (18) has multiple sets of feeding holes (19) in the vertical direction. A bearing seat (12) is fixedly connected to the middle of the feeding hole (19). The bearing seats (12) are symmetrically arranged on both sides of the feeding hole (19). A connecting shaft (14) is rotatably connected in the bearing seat (12). A baffle (13) is fixedly connected to the middle of the connecting shaft (14). The baffle (13) is rotatably connected inside the feeding hole (19). Helical gears (15) are fixedly connected to both ends of the connecting shaft (14). A control plate (9) is slidably connected inside the feeding cylinder (18). A control block (11) is fixedly connected to the top of the control plate (9). A rack is provided on the outer wall of the control block (11). The outer wall of the control block (11) is meshed with the helical gear (15) through the rack. A mounting base (5) is fixedly installed at the bottom end of the sleeve (1) near the discharge cylinder (18). A scale (4) is rotatably connected inside the mounting base (5). A fixing base (6) is fixedly installed on the outer wall of the sleeve (1). A retaining ring (8) is fixedly connected to the outer wall of the fixing base (6). A insert plate (7) is slidably connected inside the retaining ring (8). A spring (16) is fixedly connected to the top of the control plate (9), and a limiting ring (17) is fixedly installed on the inner wall of the feeding cylinder (18). The limiting ring (17) is located directly above the control plate (9). The top of the spring (16) is fixedly connected to the lower surface of the limiting ring (17). The limiting ring (17) and the spring (16) are both located in the annular area of ​​the control plate (9). A bottom ring (10) is fixedly connected to the bottom of the control plate (9). The width of the bottom ring (10) is greater than that of the control plate (9). The discharge hole (19) passes through both the discharge cylinder (18) and the sleeve (1), and the top of the discharge hole (19) is connected to the inside of the storage bin (2). Multiple sets of discharge holes (19) are equally spaced inside the discharge cylinder (18).

2. The fertilizer ring applicator for flue-cured tobacco transplanting according to claim 1, characterized in that, The control block (11) is tilted on both sides, and the tilt angle of the control block (11) is the same as the tilt angle of the helical gear (15).

3. The fertilizer ring applicator for flue-cured tobacco transplanting according to claim 1, characterized in that, The scale (4) is divided into an inner rod and an outer rod, wherein the inner rod is slidably connected in the outer rod, and the inner rod and the outer rod are connected by a damping layer. The fixed seat (6) is located directly above the mounting seat (5), and the length of the fixed seat (6) from the mounting seat (5) is equal to the length of the outer rod.

4. The fertilizer ring applicator for flue-cured tobacco transplanting according to claim 1, characterized in that, The inner wall of the feeding cylinder (18) has multiple sets of grooves, and the helical gear (15) and the control block (11) are both located inside the grooves.

5. A ring-applied fertilizer applicator for flue-cured tobacco transplanting according to claim 1, characterized in that, The method of using the flue-cured tobacco transplant fertilizer ring applicator includes the following steps: Step 1: After adding enough fertilizer to the storage bin (2), hold the handle (3) and press down so that the sleeve (1) drives the discharge cylinder (18) to insert into the soil; Step 2: When the discharge cylinder (18) is inserted into the soil, the annular area of ​​the discharge cylinder (18) will squeeze the soil and cause the bottom ring (10) inside the discharge cylinder (18) to be squeezed and pushed upward. The bottom ring (10) drives the control plate (9) to move upward. The control plate (9) drives the baffle (13) to flip through the control block (11) on the outside. During the flipping process, the fertilizer on the top of the baffle (13) will fall down to fertilize the bottom. Step 3: Lift the feeding cylinder (18) upwards. The control plate (9) resets under the action of the spring (16), and at the same time drives the control block (11) to control the baffle (13) to flip again, so that the feeding cylinder (18) can fertilize again. Step 4: Open the insert plate (7) so that the scale (4) is set perpendicular to the sleeve (1) and the end of the scale (4) is aligned with the previous fertilizer hole, thereby controlling the distance between the two sets of fertilizer holes; Step 5: After fertilizing, retract the ruler (4) and rotate the ruler (4) to a vertical position. Then open the insert plate (7) so that the top of the ruler (4) is locked in the fixing seat (6) to complete the storage of the ruler (4).

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