Inter-row soybean seeding machine suitable for corn and soybean intercropping

Abstract

The utility model discloses an inter-row soybean seeder suitable for corn and soybean intercropping, and belongs to the technical field of agricultural machinery. The corn two-to-air planting machine is used in a corn two-to-air planting mode and comprises a rack, a three-point suspension frame and sowing and pressing assemblies, the two sets of sowing and pressing assemblies are symmetrically arranged on the rack, each sowing and pressing assembly is composed of three soybean sowing single bodies and a pressing device, ditching cutters of the three soybean sowing single bodies are arranged in a triangular shape, and the horizontal intervals of three ditching discs are equal. The ditching cutter and the ditching disc are matched to dig V-shaped seed ditches with equal spacing, and press wheels on the press device respectively correspond to three seed ditches; the distance between the adjacent seed ditches of the two groups of sowing and pressing assemblies is L1 + 2L3, L1 is the row spacing of standard corn seedling rows, and L3 is the distance between the soybean seedling row on the outer side and the adjacent corn seedling row and is half of L1. According to the invention, accurate seeding of soybeans can be realized, the row spacing of seed ditches, the row spacing and the seeding depth all meet the requirements of corn and soybean composite planting, and the corn and soybean composite planting effect is improved.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, and in particular relates to a soybean planter suitable for intercropping corn and soybeans. Background Technology

[0002] To strike a balance between ensuring food security and protecting the ecological environment, the development of sustainable agriculture is imperative. While traditional farming has promoted agricultural production, it has also led to problems such as declining soil fertility and soil erosion; at the same time, the continuous compaction of soil by large agricultural machinery further exacerbates soil degradation. The concept of conservation tillage, proposed in the 1930s and 40s, advocated for reduced tillage and no-till farming, as well as straw mulching, which significantly reduced soil erosion and protected soil fertility. In the early 21st century, the United Nations further proposed conservation agriculture, which includes reduced tillage, persistent surface cover, and diversified crop rotation. However, under current agricultural production conditions, large-scale corn-soybean rotation is not feasible, and the focus of conservation tillage remains on ensuring corn production capacity. Therefore, it is necessary to adopt new measures to optimize conservation agriculture in order to achieve sustainable soil use.

[0003] An innovative conservation tillage planting model for maize, which involves intercropping leguminous crops between maize rows without affecting maize yield, and implementing inter-year maize-leguminous crop rotation, provides a new perspective for achieving sustainable soil and agricultural development. Through the root growth of leguminous crops, they penetrate compacted soil layers, fix nitrogen in root nodules, and then decompose to form numerous biological pores (root holes). This improves soil structure and water and aeration, and provides a priority pathway for the root growth of subsequent crops, thereby promoting crop growth.

[0004] Existing corn-soybean intercropping planters have problems such as being unable to meet the requirements of intercropping and low matching degree between agricultural machinery and agronomy. Summary of the Invention

[0005] To address the aforementioned technical problems and improve the soybean sowing effect in corn-soybean intercropping, this invention provides an inter-row soybean planter suitable for corn-soybean intercropping. It can achieve soybean sowing between corn seedlings before the corn jointing stage (when the corn seedling height is less than 50cm), thereby improving the effect of corn-soybean intercropping.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] This invention discloses an inter-row soybean planter suitable for intercropping corn and soybeans, specifically for a two-way intercropping corn planting pattern. It includes a frame, a three-point suspension frame, and a planting and pressing assembly. Two sets of planting and pressing assemblies are symmetrically arranged on the frame. Each assembly consists of three soybean planting units and a pressing device. Each soybean planting unit has a furrowing blade on one side of a furrowing disc. The furrowing blades of the three soybean planting units are arranged in a triangular pattern. The three furrowing discs are equally spaced horizontally. The furrowing blades work in conjunction with the furrowing discs to create V-shaped planting furrows. The row spacing of the V-shaped planting furrows created by the three soybean planting units is equal. The soil-covering and pressing components on the pressing device correspond to the three planting furrows. The distance between adjacent planting furrows of the two sets of planting and pressing assemblies is L1 + 2L3, where L1 is the row spacing of a standard corn seedling row, and L3 is the distance between the outer soybean seedling row and the adjacent corn seedling row, which is half of L1. This method enables precise soybean planting, meets the requirements of corn-soybean intercropping, and improves the intercropping effect.

[0008] Furthermore, the soybean planting unit includes a seed box, a fixing frame, a seed metering device, a depth adjustment frame, a compression spring, a seed metering tube, a furrowing disc, and a furrowing knife. The seed box is mounted on top of the machine frame via the seed box fixing frame. The seed outlet of the seed box is connected to the seed metering tube via the seed metering device. The seed outlet of the seed metering tube is located behind the furrowing knife, corresponding to the V-shaped seed furrows created. One end of the depth adjustment frame is connected to the machine frame, and the other end is connected to the upper support arm. The end of the upper support arm connected to the depth adjustment frame has multiple mounting holes along its vertical direction. The upper support arm and... The depth adjustment mechanism utilizes different mounting holes to achieve depth adjustment. One end of the lower support arm is hinged to the lower end of the upper support arm, and a support plate is hinged to the other end of the lower support arm. A compression spring connects the support plate and the upper support arm. The trenching cutter is bolted to the bottom of the lower support arm. The trenching disc is connected to the lower trenching support arm via a rotating shaft, allowing the trenching disc to rotate. The lower trenching support arm, the upper trenching support arm, and the compression spring achieve trench contouring. The compression spring allows the trenching disc to adapt to terrain undulations, creating V-shaped planting trenches through the combined action of the trenching disc and the trenching cutter. The overall structure is compact and reasonable, with all components fitting tightly, ensuring stable and reliable operation.

[0009] Furthermore, the grooving disc is a notched grooving disc, and the grooving knife on the side away from the grooving disc has a beveled edge. The grooving disc cuts a vertical surface of a V-shaped seed groove, and the grooving knife cuts a beveled surface of the seed groove. The included angle of the V-shaped seed groove is in the range of 30-45 degrees. The height difference h1 between the grooving knife and the ground end of the grooving disc is 10-20mm, which is conducive to cutting a V-shaped seed groove.

[0010] Furthermore, both the forward end and the bottom end of the trenching cutter are equipped with blades, with an arc transition between them. The resulting blade curve consists of two straight blade lines and an arc transition curve. The included angle δ between the two straight blade lines is 105-120 degrees. This facilitates the trenching cutter's entry into the soil and, in conjunction with the trenching disc, creates the required planting trenches.

[0011] Furthermore, the angle β between the cutting edge at the forward direction end of the trenching cutter and the vertical direction is 15-20°, and the tip of the cutting edge at the forward direction end is obliquely facing the forward direction, so that the trenching cutter can smoothly enter the soil.

[0012] Furthermore, the cutting edge of the trenching knife is a bevel, and the angle θ between the bevel and the vertical plane is in the range of 30-45 degrees, so that the angle between the trenching disc and the V-shaped planting trench opened by the trenching knife is in the range of 30-45 degrees; this facilitates the trenching knife to cut into the soil and works with the trenching disc to open the V-shaped planting trench.

[0013] Furthermore, the compaction device includes a cylindrical compaction roller and three sets of equally spaced soil-covering compaction components on it. Each soil-covering compaction component corresponds longitudinally to the furrowing knife of the soybean planting unit to complete the soil covering and compaction of the V-shaped planting furrow. The soil-covering compaction component has a frustum structure and is fitted onto the compaction roller. The angle γ between the generatrix and the axis of the frustum structure soil-covering compaction component is in the range of 45-60 degrees, and the width h2 of the frustum is 5-10cm, which is beneficial for soil covering and compaction.

[0014] Furthermore, the row spacing of the planting furrows in the soybean planting unit is L2, where L2 is 20-30cm.

[0015] Furthermore, the row spacing L1 of the standard corn seedling row is 50cm or 60cm.

[0016] Furthermore, the plant spacing of the outer soybean rows is the same as that of the corn rows, while the plant spacing of the middle soybean rows is 1 / 3 to 1 / 2 of the corn row spacing. This satisfies the two-to-one spacing planting pattern for corn.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. This invention is used in a corn-soybean intercropping system, enabling soybean sowing between corn seedlings before the corn jointing stage (when the corn seedling height is less than 50cm). The planter of this invention, through the rational design of the sowing and pressing components, can achieve precise soybean sowing. The row spacing, plant spacing, and sowing depth all meet the requirements of corn-soybean intercropping, improving the effect of corn-soybean intercropping and providing favorable conditions for soybean growth.

[0019] 2. The soybean seeding unit of this invention, in conjunction with the V-shaped furrowing device and the V-shaped soil covering and compaction component, achieves high-quality soybean seed planting. The overall structure of the seeder is compact and reasonable, with close cooperation between all components, ensuring stable and reliable operation. Simultaneously, the adoption of an existing mature seed metering device structure guarantees the stability and uniformity of sowing, reducing production costs.

[0020] 3. The depth adjustment frame of this invention is reasonably designed, allowing for convenient and quick adjustment of the sowing depth to adapt to different soil conditions and sowing requirements. Simultaneously, the cooperative structure of the furrowing disc and furrowing blades can adapt to undulating terrain, ensuring smooth sowing operations and demonstrating strong adaptability.

[0021] 4. The seeder of the present invention can make full use of land resources under the two-way planting mode of corn, rationally arrange the planting row spacing and plant spacing of soybeans, increase the planting density and yield of soybeans, maximize the utilization of land resources, and improve agricultural production efficiency. Attached Figure Description

[0022] Figure 1 This is a front view of the soybean planter for seedlings according to the present invention.

[0023] Figure 2 for Figure 1 The right view.

[0024] Figure 3 This is an isometric view of the soybean planter for seedlings according to the present invention.

[0025] Figure 4 This is a front view of the soybean seed unit of the present invention.

[0026] Figure 5 for Figure 4 The left view.

[0027] Figure 6 This is a schematic diagram showing the positions of the seeding furrow opener and the conical press wheel of the present invention.

[0028] Figure 7 This is a schematic diagram showing the position of soybean and corn seedling rows in the inter-seedling soybean planter of the present invention.

[0029] In the diagram: 1. Three-point suspension bracket,

[0030] 2. Soybean seeding unit; 21. Seed box; 22. Seed box fixing frame; 23. Seed metering device; 24. Depth adjustment frame; 25. Compression spring; 26. Seed metering tube; 27. Upper support arm; 28. Lower support arm; 29. ​​Furrowing disc; 210. Furrowing knife;

[0031] 3. Rack,

[0032] 4. Compacting device; 41. Soil compaction components; 42. Compacting roller;

[0033] 5. Corn seedling row, 6. Soybean seedling row, L1 is the row spacing of the standard corn seedling row, L2 is the row spacing of the soybean seedling row, and L3 is the distance between the outer soybean seedling row and the adjacent corn seedling row. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Example 1: This invention provides a soybean planter for intercropping corn and soybeans, used in a two-row, empty-row corn planting pattern, i.e., planting two rows of corn with one row empty, forming corn rows with spacings of L1 and 2L1. Before the corn jointing stage (when the corn seedlings are less than 50cm tall), soybeans are planted within the 2L1 corn row spacing. In this example, the standard corn seedling row 5 has a row spacing of 50cm L1, so the spacing between the empty rows is 100cm.

[0036] Furthermore, the plant spacing of the outermost soybean rows (6 rows) is the same as that of corn, while the plant spacing of the middle soybean rows (6 rows) is half that of corn. This plant spacing design makes full use of land resources and increases soybean planting density and yield.

[0037] The inter-row soybean planter of the present invention includes a frame 3, a three-point suspension frame 1, and a planting and pressing assembly. The three-point suspension frame 1 is installed at the front end of the frame 3. Two sets of planting and pressing assemblies are symmetrically arranged on the frame 3. The planting and pressing assembly consists of three soybean planting units 2 and a pressing device 4. Each soybean planting unit is provided with a furrowing blade 210 on one side of the furrowing disc. The furrowing blades 210 of the three soybean planting units 2 are arranged in a triangular pattern. The three furrowing discs 29 are horizontally spaced equally. The furrowing blades 210 and the furrowing discs 29 cooperate to open V-shaped planting furrows. The row spacing of the V-shaped planting furrows opened by the three soybean planting units is equal. The soil covering and pressing components 42 on the pressing device 4 correspond to the three planting furrows respectively. The distance between adjacent planting furrows of the two sets of planting and pressing assemblies is L1 + 2L3 = 100mm, where L1 is the row spacing of a standard corn seedling row, and L3 is half the distance between the outer soybean seedling row and the adjacent corn seedling row, which is 25mm in this example. In this example, the row spacing of the planting furrows for soybean planting unit 2 is L2, which is 20cm. This can meet the growth requirements of soybeans while ensuring a reasonable distance from the corn seedling rows 5 to avoid competition between them.

[0038] This invention uses two sets of symmetrically arranged sowing and pressing components, with three soybean sowing units in each set working together to achieve precise soybean sowing. The row spacing, plant spacing, and sowing depth all meet the requirements of corn-soybean intercropping, improving the effect of corn-soybean intercropping and providing favorable conditions for soybean growth.

[0039] The soybean planting unit 2 includes a seed box 21, a fixing frame 22, a seed metering device 23, a depth adjustment frame 24, a compression spring 25, a seed metering tube 26, a furrowing disc 29, and a furrowing knife 210. The seed box 21 is mounted on top of the machine frame 3 via the seed box fixing frame 22. The seed outlet of the seed box 21 is connected to the seed metering device 23, and the seed metering port below the seed metering device 23 is connected to the seed metering tube 26. The seed outlet of the seed metering tube 26 is located behind the furrowing knife 210, corresponding to the V-shaped seed furrows opened. One end of the depth adjustment frame 24 is connected to the machine frame 3, and the other end is connected to an upper support arm 27. The upper support arm 27 has multiple mounting holes along its vertical direction at the end connected to the depth adjustment frame 24. Different mounting holes are installed between the support arm 27 and the depth adjustment frame 24 to achieve depth adjustment. The lower end of the upper support arm 27 is hinged to one end of the lower support arm 28, and the other end of the lower support arm 28 is also hinged to a support plate 211. A compression spring 25 connects the support plate 211 and the upper support arm 27. The furrowing blade 210 is fixed to the bottom end of the lower support arm 28 by bolts. The furrowing disc 29 is connected to the lower support arm 28 via a rotating shaft, enabling the rotation of the furrowing disc 29. The furrowing lower support arm 28, the furrowing upper support arm 27, and the compression spring 25 achieve furrow contouring. The compression spring 25 allows the furrowing disc 29 to adapt to terrain undulations, creating V-shaped planting furrows through the combined action of the furrowing disc 29 and the furrowing blade 210. This invention can achieve both ground contouring and depth adjustment as needed, allowing for convenient and quick adjustment of the sowing depth, ensuring consistent planting depth to adapt to different soil conditions and sowing requirements, and achieving good sowing quality.

[0040] The grooving disc 29 is a notched grooving disc, with a beveled cutting edge on the side away from the grooving disc 29. The grooving disc 29 cuts a vertical surface of a V-shaped seed groove, and the grooving knife 210 cuts a beveled surface of the seed groove. The included angle of the V-shaped seed groove is 40 degrees. The height difference h1 between the grooving knife 210 and the ground end of the grooving disc 29 is 15mm.

[0041] The trenching cutter 210 has a cutting edge at both its forward direction end and bottom end, with an arc transition between them. The resulting cutting edge curve consists of two straight cutting lines and an arc transition curve; the included angle δ between the two straight cutting lines is 110 degrees.

[0042] The angle β between the cutting edge of the grooving cutter 210 at the forward direction end and the vertical direction is 17.5°, and the tip of the cutting edge at the forward direction end is obliquely facing the forward direction.

[0043] The cutting edge of the grooving knife 210 is an inclined plane, and the angle θ between the inclined plane and the vertical plane is 40°, so that the angle between the grooving disc 29 and the V-shaped planting groove opened by the grooving knife 210 is 40°.

[0044] The seed metering device 23 is an existing spoon-wheel type soybean seed metering device structure, which can stably and evenly discharge soybean seeds to ensure sowing quality.

[0045] The compaction device includes a cylindrical compaction roller 42 and three sets of equally spaced soil-covering compaction components 41 on it. Each soil-covering compaction component 41 corresponds longitudinally to the furrowing blade 210 of the soybean seed unit 2, completing the soil covering and compaction of the V-shaped seed furrow. The soil-covering compaction component 41 has a frustum structure and is fitted onto the compaction roller 42. The angle γ between the generatrix and the axis of the frustum structure soil-covering compaction component is 50°, and the width h2 of the frustum is 8cm. The frustum structure soil-covering compaction component 41 cooperates with the beveled cutting edge of the furrowing blade 210 to better compact the seed furrow, ensuring close contact between the seed and the soil, and improving the germination rate and growth rate of the seed.

[0046] When the present invention is in operation, the three-point suspension frame 1 is connected to the traction machine to drive the seeder of the present invention. The two sets of seeding and pressing components of the present invention are placed in the corn rows. The distance between the soybean seeding units 2 on both sides and the adjacent corn rows is L3 = 25mm. The row spacing of the three soybean seeding units is L2 = 25mm. The row spacing of the standard corn seedling row is L1 = L2 + L3 = 50mm. According to actual needs, the furrowing and sowing depth is adjusted by the furrowing depth adjustment frame 24. When the seeder is traveling in the field, the conical furrowing blades 28 and furrowing discs 27 of the soybean seeding units 2 work together to open conical seed furrows. The seed dispensing pipe 26 connected to the seed metering device 25 evenly dispenses soybean seeds into the conical seed furrows. The cylindrical pressing roller 42 of the pressing device 4 provides support and depth limit. The soil covering and pressing component 41 with a truncated cone structure completes the soil covering and pressing of the seed furrows, improving the compaction effect of the seed furrows. The seeder of this invention can achieve precise sowing of soybeans, meet the row spacing, plant spacing and sowing depth requirements of corn-soybean intercropping, and improve sowing quality and crop yield.

[0047] Example 2: This example differs from Example 1 in that: taking a standard corn row spacing L1 of 60mm as an example, the spacing between empty rows is 120cm; the distance L3 between the outer soybean seedling row and the adjacent corn seedling row is half of L1, which is 30mm; the distance between adjacent planting furrows of the two sets of sowing and pressing components in this example is L1+2L3=120mm; the row spacing L2 of the planting furrows opened by the soybean sowing unit 2 is 30cm; the plant spacing of the outer soybean seedling row 6 is the same as that of the corn planting, and the plant spacing of the middle soybean seedling row 6 is 1 / 3 of the corn plant spacing.

[0048] The height difference h1 between the furrowing blade and the grounding end of the furrowing disc for each sowing unit is 10mm. The included angle δ between the two straight cutting edges of the furrowing blade 210 is 105°. The included angle β between the cutting edge at the forward direction end of the furrowing blade and the vertical direction is 15°. The included angle θ between the beveled edge of the furrowing blade and the vertical plane is 30 degrees.

[0049] The angle γ between the generatrix of the truncated cone component of the compaction device and the axis is 60 degrees, and the width h2 of the truncated cone is 5cm.

[0050] Example 3: This example differs from Example 1 in that: taking a standard corn row spacing L1 of 60mm as an example, the spacing between empty rows is 120cm; the distance L3 between the outer soybean seedling row and the adjacent corn seedling row is half of L1, which is 30mm; the distance between adjacent planting furrows of the two sets of sowing and pressing components in this example is L1+2L3=120mm; the row spacing L2 of the planting furrow opened by the soybean sowing unit 2 is 25cm; the plant spacing of the outer soybean seedling row 6 is the same as the plant spacing of the corn planting, and the plant spacing of the middle soybean seedling row 6 is 5 / 12 of the corn plant spacing.

[0051] The height difference h1 between the furrowing blade and the grounding end of the furrowing disc for each sowing unit is 20mm. The included angle δ between the two straight cutting edges of the furrowing blade 210 is 120°. The included angle β between the cutting edge at the forward direction end of the furrowing blade and the vertical direction is 20°. The included angle θ between the beveled edge of the furrowing blade and the vertical plane is 45 degrees.

[0052] The angle γ between the generatrix of the truncated cone component of the compaction device and the axis is 45 degrees, and the width h2 of the truncated cone is 10 cm.

[0053] Components not described in detail in this application are all existing conventional technologies and will not be described further here.

[0054] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. A soybean planter for intercropping corn and soybeans, used in a two-way intercropping pattern for corn, comprising a frame, a three-point suspension frame, and a planting and pressing assembly, characterized in that: Two sets of sowing and pressing components are symmetrically arranged on the frame. Each sowing and pressing component consists of three soybean sowing units and one pressing device. Each soybean sowing unit has a furrowing blade on one side of the furrowing disc. The furrowing blades of the three soybean sowing units are arranged in a triangle. The three furrowing discs are equally spaced horizontally. The furrowing blades and the furrowing discs work together to create V-shaped planting furrows. The row spacing of the V-shaped planting furrows created by the three soybean sowing units is equal. The soil covering and pressing components on the pressing device correspond to the three planting furrows respectively. The distance between adjacent planting furrows of the two sets of sowing and pressing components is L1+2L3, where L1 is the row spacing of the standard corn seedling row, and L3 is the distance between the outer soybean seedling row and the adjacent corn seedling row, which is half of L1.

2. The inter-row soybean planter for intercropping corn and soybeans according to claim 1, characterized in that: The soybean planting unit includes a seed box, a fixing frame, a seed metering device, a depth adjustment frame, a compression spring, a seed metering tube, a furrowing disc, and a furrowing knife. The seed box is mounted on top of the machine frame via the seed box fixing frame. The seed outlet of the seed box is connected to the seed metering tube via the seed metering device. The seed outlet of the seed metering tube is located behind the furrowing knife, corresponding to the V-shaped seed furrows created. One end of the depth adjustment frame is connected to the machine frame, and the other end is connected to the upper support arm. The end of the upper support arm connected to the depth adjustment frame has multiple mounting holes along its vertical direction. The upper support arm and the depth adjustment frame... Different mounting holes are installed between the adjustment frames to achieve depth adjustment. The lower end of the upper support arm is hinged to one end of the lower support arm, and the other end of the lower support arm is also hinged to a support plate. A compression spring is connected between the support plate and the upper support arm. The trenching knife is fixed to the bottom end of the lower support arm by bolts. The trenching disc is connected to the trenching lower support arm by a rotating shaft to realize the rotation of the trenching disc. The trenching lower support arm, the trenching upper support arm, and the compression spring realize the trenching contouring. The compression spring makes the trenching disc adapt to the terrain undulations. Under the cooperation of the trenching disc and the trenching knife, a V-shaped planting trench is opened.

3. The inter-row soybean planter for intercropping corn and soybeans according to claim 2, characterized in that: The grooving disc is a notched grooving disc, and the grooving knife on the side away from the grooving disc has a beveled cutting edge. The grooving disc cuts a vertical surface of a V-shaped seed groove, and the grooving knife cuts a beveled surface of the seed groove. The included angle of the V-shaped seed groove is in the range of 30-45 degrees. The height difference h1 between the grooving knife and the ground end of the grooving disc is 10-20mm.

4. The inter-row soybean planter for intercropping corn and soybeans according to claim 3, characterized in that: The trenching cutter has a cutting edge at both its forward direction end and bottom end, with an arc transition between them. The resulting cutting edge curve consists of two straight cutting lines and an arc transition curve. The included angle δ between the two straight cutting lines is 105-120 degrees.

5. The inter-row soybean planter for intercropping corn and soybeans according to claim 3, characterized in that: The angle β between the cutting edge at the forward direction end of the trenching cutter and the vertical direction is 15-20°, and the tip of the cutting edge at the forward direction end is obliquely facing the forward direction.

6. The inter-row soybean planter for intercropping corn and soybeans according to claim 3, characterized in that: The cutting edge of the grooving knife is a bevel, and the angle θ between the bevel and the vertical plane is in the range of 30-45 degrees, so that the angle between the grooving disc and the V-shaped seed groove opened by the grooving knife is in the range of 30-45 degrees.

7. The inter-row soybean planter for intercropping corn and soybeans according to claim 2, characterized in that: The pressing device includes a cylindrical pressing roller and three sets of equally spaced soil covering and pressing components on it. Each soil covering and pressing component corresponds longitudinally to the furrowing knife of the soybean planting unit to complete the soil covering and pressing of the V-shaped planting furrow. The soil covering and pressing component is a truncated cone structure, which is fitted onto the pressing roller. The angle γ between the generatrix and the axis of the truncated cone structure soil covering and pressing component is in the range of 45-60 degrees, and the width h2 of the truncated cone is 5-10cm.

8. The inter-row soybean planter for intercropping corn and soybeans according to claim 1, characterized in that: The row spacing of the planting furrows for the soybean planting unit is L2, where L2 is 20-30cm.

9. The inter-row soybean planter for intercropping corn and soybeans according to claim 1, characterized in that: The row spacing L1 of the standard corn seedling row is 50cm or 60cm.

10. The inter-row soybean planter for intercropping corn and soybeans according to claim 1, characterized in that: The spacing between soybean seedlings on the outer row is the same as that between corn plants, while the spacing between soybean seedlings in the middle row is 1 / 3 to 1 / 2 of that between corn plants.

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