Sowing unit for a precision seeder

Abstract

The invention relates to a sowing unit (10) for a precision seeder, comprising: a bracket (12); a tine share (24) arranged on the bracket (12) for producing a placement furrow for grains of seed, which furrow extends in the direction of travel, in the soil of an agricultural area; a separation device (18) arranged on the bracket (12) for separating grains of seed; a placement device (20) arranged on the bracket (12) for placing the grains of seed which have been separated by the separation device (18) into the placement furrow produced by the tine share (24); and a rolling body (26, 36, 38a, 38b) arranged on the bracket (12) for supporting the sowing unit (10) against the soil of the agricultural area and / or for depth guidance of the tine share (24).

Description

[0001] Sowing unit for a precision seed drill

[0002] Description

[0003] The invention relates to a sowing unit for a precision seed drill according to the preamble of patent claim 1 and a precision seed drill according to the preamble of patent claim 15.

[0004] Seeding units of precision seed drills typically feature a furrow former located between two cutting discs of the seeding unit. The furrow former serves to stabilize and shape the placement furrow opened by the cutting discs. Such furrow formers are typically positioned "on track" with the ground, meaning their front edge forms an acute angle with the direction of travel vector, causing the furrow former to drag across the ground.

[0005] Document DE 10 2005 037 062 A1 discloses a coulter unit equipped with discs and tines, allowing different types of seed to be sown. Document DE 42 37 093 A1 describes how a tine coulter can be used alone or in combination with a disc. Document EP 2 950 629 B1 describes a furrow former intended for use with discs and guided by a depth control roller.

[0006] Furthermore, EP 0 202 229 B1 discloses a precision seed drill with row units, the row units being equipped with a furrow former. EP 0 369 766 B1 describes a tine seed drill with overpressure singulation. US 2005 / 0274309 A1 and RU 204018 U1 also disclose a furrow former.

[0007] When using mulch seed drills with cutting discs and a furrow former, under no-till conditions and conditions with a high organic matter content, the organic matter may not be cut cleanly and pushed into the furrow. As a result, the seed is deposited on top of the organic matter and has no contact with the soil, resulting in reduced field emergence.

[0008] The object underlying the invention is to improve the single-seed placement under direct sowing conditions and conditions with a high proportion of organic matter.

[0009] The object is achieved by a sowing unit of the type mentioned at the outset, wherein the tine share of the sowing unit according to the invention has a furrow opening edge on the front side and enclosing an obtuse angle with the direction of travel vector for opening the placement furrow.

[0010] To create the placement furrow, instead of a combination of cutting discs and furrow former, a tine share working "on the grip" is used. The fact that the front furrow opening edge runs at an obtuse angle to the direction of travel results in a positive cutting angle. By using tine shares working "on the grip", prior soil preparation, as with actual direct drilling, is no longer necessary, which is particularly advantageous in areas prone to erosion. In addition, the placement furrow is cleared more effectively, particularly of organic material, which improves the seed's contact with the soil. With the tine share working "on the grip", the organic material is not pushed into the soil, but is cleared from the furrow by the positive cutting angle.Furthermore, the positive cutting angle draws the tine coulter into the soil, requiring less coulter pressure than a single-seed coulter with coulter discs. Additional coulter pressure only needs to apply a slight pressure to the tine coulter and can therefore be implemented much more easily and cost-effectively. Furthermore, compared to a disc coulter, there is significantly less soil movement, meaning that grass and weeds are not stimulated to germinate, or at least germinate to a much lesser extent. Furthermore, a narrower placement furrow can be created compared to a double disc coulter, meaning less soil material is disturbed and the risk of weeds and grasses germinating is further reduced. Furthermore, the costs for the sowing unit are reduced because the coulter discs and bearings are no longer required.In addition, the self-retracting action of the tine share is beneficial for depth control, as the often complex hydraulic share pressure control is simplified and the share itself can be constructed more easily. Such tine shares are usually only used for direct drilling or mulch drilling without prior soil cultivation. In precision drilling with seeding units that have a rolling body to support the seeding unit against the soil, only tine-like furrow formers have been used to form an already opened placement furrow. These tine-like furrow formers have a front furrow forming edge that runs at an acute angle to the direction of travel. These tine-like furrow formers therefore work "on trail." The seeding unit can be a row unit for a precision seed drill.

[0011] In a preferred embodiment of the sowing unit according to the invention, the tine share has an opening section located in a front region of the tine share, wherein the furrow opening edge is arranged in the opening section. The tine share preferably has a shaping section behind the opening section in the direction of travel, with one or more shaping surfaces for shaping the placement furrow opened by the furrow opening edge. The one or more shaping surfaces within the shaping section press the soil on the lateral furrow surfaces outward, thereby forming a furrow wall and stabilizing and shaping the placement furrow.

[0012] In another preferred embodiment of the sowing unit according to the invention, the tine share has, in the direction of travel, behind the opening section and / or the shaping section, a reconsolidation section with one or more reconsolidation surfaces for reconsolidating the placement furrow opened by the furrow opening edge and / or formed by the one or more shaping surfaces. The front furrow opening edge of the tine share, which operates on a grip, breaks the soil out of the ground to a greater extent than tine shares that operate on a drag line. For this reason, the furrow bottom of a placement furrow opened with a front furrow opening edge that operates on a grip line is less even than the furrow bottom of a placement furrow created with a tine share that operates on a drag line.The resulting impairments in planting depth differences and seed collection quality resulting from the use of a tine share with a front furrow opening edge positioned on a grip must be compensated for by targeted recompaction. In this context, the reconsolidation section ensures appropriate soil redistribution and the creation of a uniform furrow bottom. Furthermore, the seed's contact with the soil is improved. The opening section is preferably narrower than the shaping section and / or reconsolidation section, thereby improving the clearing, stabilizing, and reconsolidation properties of the tine share.A bottom-side reconsolidation surface is preferably arranged such that it extends slightly deeper, for example, 1 mm to 4 mm, into the soil than the furrow opening edge, so that the soil in the bottom area of ​​the placement furrow is compressed, thus consolidating, stabilizing, and shaping the placement furrow. The reconsolidation surfaces in the reconsolidation section thus preferably ensure compression of the soil at the furrow bottom.

[0013] The sowing unit according to the invention is further advantageously developed in that the opening section, the shaping section and / or the reconsolidation section are integral components of a one-piece tine body of the tine share. The one-piece tine body can be made of metal or a metal alloy, for example. Between the opening section and the reconsolidation section, in particular between the opening section and the shaping section, the one-piece tine body preferably has a material bridge. A fastening member, in particular a screw, via which the tine share is fastened to the unit carrier preferably extends through the material bridge. Above the material bridge there is preferably a tapered, in particular conical receiving and positioning area for receiving, in particular for positively receiving, a fastening section of the unit carrier.The tapered receiving and positioning area ensures pre-positioning of the tine body in relation to the aggregate carrier during assembly of the tine body, whereby a receiving opening for the fastening member extending through the material bridge is aligned with a threaded section in the aggregate carrier.

[0014] In a further preferred embodiment of the sowing unit according to the invention, the placement device has a placement channel for the separated seeds, and the placement channel is attached to the tine share. The placement channel is preferably arranged on the tine share in such a way that the placement channel cannot be damaged by the placement furrow and / or soil components, such as stones. In particular, the placement channel is arranged behind the tine share in the direction of travel, in the slipstream of the tine share. The placement channel can be a seed channel, in particular a chute channel. The separated seeds are discharged through a discharge opening at the bottom end of the placement channel in the direction of the placement furrow.

[0015] In another preferred embodiment of the sowing unit according to the invention, the singling device is configured to be operated based on differential pressure. Preferably, the singling device is configured to perform overpressure singling. Overpressure singling allows an increase in driving speed while simultaneously improving the longitudinal distribution of the seed on the agricultural land. With differential pressure-based singling, singling takes place within a singling housing of the singling device. A separating element, for example a perforated disc, can be arranged in the singling housing, which divides the interior of the singling housing into two areas. The first area, in which the seeds are located, always has a higher pressure than a second area.For this purpose, either the second area is provided with a negative pressure or the first area, which carries the grains, is provided with positive pressure. In this respect, a distinction is made between negative pressure and positive pressure singulation. The pressure difference presses individual grains, for example, into the perforations of the disc, which run through a seed reservoir located in the lower area of ​​the singulation housing. Excess grains that are not pressed into the perforations of the disc are, for example, stripped off by the disc. The separated grains in the perforations of the disc are released from the disc when a grain outlet is reached by interrupting the pressure difference. The pressure interruption element used to interrupt the pressure difference is arranged on the side not carrying the grains and causes the perforations to be covered.With overpressure singulation, the separated grains are further accelerated in the placement channel by the overpressure prevailing in the grain-carrying area, causing them to be shot into the furrow. For example, the separated grains can be shot under a catching element located behind the placement opening of the placement channel, so that the grains are immediately clamped there and cannot jump out of the placement furrow. The catching element of the sowing unit can, for example, be a catching roller designed as an intermediate pressure roller. In this case, the tine share is combined with an intermediate pressure roller.

[0016] In a further embodiment, the sowing unit according to the invention has a seed hopper arranged on the unit carrier, which is connected to the singulating device via a seed conveying path. The seed hopper can be manually filled. The seed hopper can also be an intermediate container, which is continuously or as needed supplied with seed from a central container. Alternatively or additionally, the sowing unit can have a seed inlet arranged on the unit carrier, which can be connected to a central container of a seed drill and is configured to be continuously or as needed supplied with seed from the central container. The seed inlet can be part of a nursing system.

[0017] In a particularly preferred embodiment, the sowing unit according to the invention has a catching element arranged on the unit carrier for braking and / or pressing the seeds deposited into the placement furrow via the placement device. The catching element can be a catching roller running behind the tine share and the placement channel. The catching element preferably improves the soil connection of the seed. The catching element can also be a seed setter arranged behind the tine share and the placement channel. The seed setter can be pretensioned relative to the soil and configured to press the seed into the soil in a grazing manner. The seed setter can be configured to align the seed lying in the placement furrow, in particular in the longitudinal direction. The catching element can comprise one or more sensors for detecting placement conditions and / or soil properties.For example, the catching element includes one or more sensors for measuring the temperature, moisture, and / or electrical conductivity of the soil. Using the sensor data, the depth control of the sowing unit can be adjusted to the soil conditions by keeping the respective measured values ​​within a range representative of the required planting depth.

[0018] In a further preferred embodiment of the sowing unit according to the invention, the rolling body is designed as a depth control roller running behind the tine share in the direction of travel or as a support roller or hoop roller running laterally next to the tine share. By using a depth control roller running behind the tine share, the overall costs are significantly reduced by eliminating the support rollers. Due to the lack of lateral support rollers, a depth control roller running behind the tine share in the direction of travel also leads to improved material flow. A support roller running laterally next to the tine share or as a hoop roller reduces soil throw and thus the formation of ridges. Furthermore, depth control is improved because the support roller or hoop roller is positioned close to the placement location. Lateral hoop rollers can also pull organic material through.

[0019] A sowing unit according to the invention is also advantageous which has a trailing tool arranged on the unit carrier for closing the placement furrow. The trailing tool can be a closer, in particular a disc closer. The disc closer can, for example, be designed such that the furrow side wall is broken up. The trailing tool can also be a pair of rollers, wherein the rollers can be arranged in a V-shape relative to one another. The sowing unit according to the invention is further advantageously developed by at least one front tool arranged on the unit carrier, wherein the front tool is arranged in front of the tine share in the direction of travel. The front tool can, for example, be a fertilizer share for depositing fertilizer. By means of the fertilizer share, the fertilizer can, for example, be offset laterally or deposited at a different placement depth than the seed.One or more front tools designed as cutting discs can also be arranged on the aggregate carrier. Preferably, a single cutting disc is used as the front tool. Furthermore, one or more front tools designed as clearing elements can be arranged on the aggregate carrier. The clearing elements can be star clearers, clod clearers, or clearing chisels. The star clearer can, for example, comprise one or two clearing stars.

[0020] Furthermore, a sowing unit according to the invention is preferred in which at least one fertilizer metering and / or fertilizer application device is arranged on the unit carrier, which is preferably arranged in front of the tine share in the direction of travel. Either fertilizer or another active agent can be applied via the fertilizer metering and / or fertilizer application device. The fertilizer application device can also be suitable for applying seed. The fertilizer metering and / or fertilizer application device can comprise a portioning device for producing fertilizer portions. The portioning device can have a rotationally drivable portioning element which combines fertilizer bodies located in a portioning chamber of the portioning device into a fertilizer portion during a rotational movement. The fertilizer metering and / or fertilizer application device can also be designed for metering and / or applying microgranules.Furthermore, the fertilizer dosing and / or fertilizer application device can have an additional deposition channel, for example a deposition tube, via which micro-fertilizers, insecticides or seeds can be delivered in front of a pressure roller into the deposition furrow and / or an additional deposition furrow.

[0021] The sowing unit according to the invention is further advantageously developed in that the aggregate carrier is designed as a multi-part support frame. The aggregate carrier can comprise a parallelogram linkage connected to a main frame. The height of the aggregate carrier relative to the main frame can be adjusted via the parallelogram linkage, so that the guide height or guide depth of the sowing unit above the ground of the agricultural area can be adjusted. If a seed drill has several sowing units attached to the main frame, the sowing units can be lifted independently of one another, for example individually, or together.

[0022] The sowing unit according to the invention is further advantageously further developed by a coulter pressure detection device, wherein the contact pressure of the sowing unit or of a part of the sowing unit on the soil of the agricultural area can be detected, in particular by means of a sensor, by means of the coulter pressure detection device. Alternatively or additionally, the sowing unit comprises a coulter pressure adjustment device by means of which the contact pressure of the sowing unit or of a part of the sowing unit on the soil of the agricultural area can be adjusted, in particular regulated. Alternatively or additionally, the sowing unit has a placement depth adjustment device by means of which the guide depth of the tine coulter can be adjusted to change the furrow depth of the placement furrow. Furthermore, the sowing unit can comprise one or more soil sensors by means of which properties of the soil can be detected by sensors.For example, the sowing unit includes one or more sensors for measuring the temperature, moisture, and / or electrical conductivity of the soil. Using the sensor data, the depth control of the sowing unit can be adjusted to the soil conditions by keeping the respective measured values ​​within a range representative of the required planting depth.

[0023] The object underlying the invention is further achieved by a precision seed drill of the type mentioned above, wherein one, several, or all of the seeding units of the precision seed drill according to the invention are designed according to one of the embodiments described above. Regarding the advantages and modifications of the precision seed drill according to the invention, reference is made to the advantages and modifications of the seeding unit according to the invention. Preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying drawings. In the drawings:

[0024] Fig. 1 shows an embodiment of the sowing unit according to the invention in a schematic side view;

[0025] Fig. 2 shows a further embodiment of the sowing unit according to the invention in a schematic side view;

[0026] Fig. 3 shows a further embodiment of the sowing unit according to the invention in a schematic side view;

[0027] Fig. 4 shows the sowing unit shown in Fig. 3 in a schematic representation from below;

[0028] Fig. 5 shows a tine share of a sowing unit according to the invention in a schematic side view;

[0029] Fig. 6 shows the tine share shown in Fig. 5 in a schematic front view; and

[0030] Fig. 7 shows the tine share shown in Fig. 5 in a schematic representation from below.

[0031] Fig. 1 shows a sowing unit 10 of a precision seed drill designed as a row unit. The sowing unit 10 comprises a unit carrier 12, wherein the unit carrier 12 is designed as a welded support frame. The unit carrier 12 comprises a parallelogram linkage 14, via which the unit carrier 12 can be attached to a main frame of the precision seed drill. The parallelogram linkage 14 allows height adjustment and contour or ground adaptation of the sowing unit 10 independently of the main frame of the precision seed drill. By installing suitable devices, a downward pressure force can also be applied to the unit carrier 12 via the parallelogram linkage 14. A seed hopper 16 is attached to the unit carrier 12 and is connected to a singulating device 18 via a seed conveyor path. The seed hopper 16 is a manually fillable container.The singling device 18 serves to singulate seeds. The seeds singulated by the singling device 18 are deposited into a placement furrow on the agricultural land via a placement device 20 attached to the unit carrier 12. For this purpose, the singulated seeds are introduced into the placement channel 22 of the placement device 20, which is designed as a discharge channel, and guided via the placement channel 22 toward the placement furrow.

[0032] The singling device 18 can be operated based on differential pressure. The singling device 18 is configured for overpressure singling. Due to the overpressure singling, the singulated seeds are accelerated by the overpressure in the placement channel 22 and shot into the placement furrow. The singulated seeds are shot under a catching element 28 arranged behind the placement opening of the placement channel 22, so that the seeds are immediately clamped there and cannot jump out of the placement furrow.

[0033] The placement channel 22 is attached to a tine share 24, by means of which the placement furrow for seeds extending in the direction of travel F is created in the soil of the agricultural area.

[0034] The sowing unit 10 further comprises a rolling body 26 arranged on the unit carrier 12 for supporting the sowing unit 10 relative to the soil of the agricultural land and for depth control of the tine share 24. The rolling body 26 is designed as a depth control roller running behind the tine share 14 in the direction of travel F. By using the depth control roller 26 running behind the tine share 24, lateral support rollers can be dispensed with, resulting in improved material flow.

[0035] Furthermore, a catching element 28 is arranged on the unit carrier 12 for braking and pressing the seeds deposited into the placement furrow via the placement device 20. The catching element 28 is a catching roller running behind the tine coulter 24 and the placement channel 22. The catching roller 28 improves the seed's contact with the soil.

[0036] To close the deposition furrow, a trailing tool 30 designed as a disc closer is also arranged on the aggregate carrier 12. The disc closer 30 can, for example, be configured to break open the furrow sidewall to cause a furrow collapse, thus closing the deposition furrow.

[0037] Fig. 2 shows a sowing unit 10 in which a front tool 34 is arranged on the unit carrier 12, wherein the front tool 34 is arranged in front of the tine share 24 in the direction of travel F. In the illustrated embodiment, the front tool 34 is a cutting disc. Alternatively, a fertilizer share or a clearing element can also be used as the front tool. To close the placement furrow, trailing tools 32a, 32b designed as rollers are used, wherein the rollers 32a, 32b are arranged in a V-shape relative to one another, so that the soil in the contact area of ​​the rollers 32a, 32b is pressed into the placement furrow created by the tine share 24.

[0038] The roller bodies 36 for supporting the sowing unit 10 against the soil of the agricultural land and for depth control of the tine share 24 are in this case designed as support rollers running laterally next to the tine share 24. The support rollers running laterally next to the tine share 24 reduce soil throw and thus the formation of ridges.

[0039] Figs. 3 and 4 show a sowing unit 10 in which hoop rollers are used as rolling bodies 38a, 38b. The hoop rollers 38a, 38b run laterally next to the tine share 24. The hoop rollers 38a, 38b are positioned offset from one another in the direction of travel F and aligned in a V-shape, with the distance between the hoop rollers 38a, 38b decreasing opposite the direction of travel F. This reliably captures the soil flow caused by the tine share 24 and conveys it back to the placement furrow.

[0040] The tine coulters 24 of the sowing units 10 shown in Figs. 1 to 4 operate on a grip-type basis. The grip-type tine coulters 24 effectively clear the placement furrow of organic material, thereby improving the seed's penetration into the soil. Furthermore, the organic material is not pressed into the soil, as is the case with trailing tine coulters. Due to the positive cutting angle, the grip-type tine coulters 24 clear the organic material from the placement furrow.

[0041] The positive cutting angle of the 24-tine coulters draws the tine coulters into the soil, requiring less coulter pressure than a single-seed coulter with coulter discs. The self-retracting action of the 24-tine coulter also supports depth control, as coulter pressure control is simplified and the coulter can be constructed with a lighter weight.

[0042] The illustrated sowing units 10 can furthermore have a coulter pressure detection device, by means of which the contact pressure of the sowing unit 10 or a part of the sowing unit 10 on the soil of the agricultural area can be detected by sensors. This coulter pressure detection device can be combined with a coulter pressure adjustment device, by means of which the contact pressure of the sowing unit 10 or a part of the sowing unit 10 on the soil of the agricultural area can be adjusted, in particular regulated.

[0043] The sowing units 10 can also have a placement depth adjustment device, by means of which the guide depth of the respective tine share 24 can be adjusted to change the furrow depth of the placement furrow. Furthermore, the sowing units 10 can be equipped with one or more soil sensors, by means of which soil properties can be detected.

[0044] Figs. 5 to 7 show a tine share 24 with a one-piece tine body 40. A storage channel 22 of a storage device 20 is arranged on the tine body 40.

[0045] The tine body 40 has an opening section 42, with a furrow opening edge 44 extending within the opening section 42. The furrow opening edge 44 is located at the front of the tine body 40 and forms an obtuse angle a with the direction of travel vector F. Because the front furrow opening edge 44 extends at an obtuse angle a with the direction of travel F, a positive cutting angle is achieved, meaning the tine share 24 operates on a grip.

[0046] The opening section 42 of the tine share 24, which carries the furrow opening edge 44, is located in a front region of the tine body 40. The tine share 24 further has, behind the opening section 42 in the direction of travel F, a shaping section 46 with a plurality of shaping surfaces 48a, 48b for shaping the deposition furrow opened by the furrow opening edge 44. Behind the opening section 42 and the shaping section 46 in the direction of travel F, the tine share 24 has a reconsolidation section 50 with a reconsolidation surface 52 for reconsolidating the deposition furrow opened by the furrow opening edge 44 and formed by the shaping surfaces 48a, 48b. The reconsolidation surface 52 is guided through the soil of the agricultural area approximately 1 mm to 4 mm deeper than the furrow opening edge 44, so that the soil is compressed at the furrow surface.

[0047] Between the opening section 42 and the reconsolidation section 50, the tine body 40 has a material bridge 54. A recess 56 extends through the material bridge 54 for receiving a fastening element, for example a screw. The screw can be used to screw the tine body 40 to an aggregate carrier 12. Above the material bridge 54 is a tapered conical receiving and positioning area 58 for receiving a fastening section of the aggregate carrier 12. Due to the tapered conical shape of the receiving and positioning area 58, the tine body 40 is positioned on the aggregate carrier 12 such that the recess 56 is aligned with a threaded bore in the aggregate carrier 12. The insertion and tightening of the fastening element, which is designed as a screw, is thus considerably simplified, whereby the assembly of the tine share 24 can be considerably accelerated.The discharge opening 60 of the discharge channel 22 is located approximately at the level of the rear end edge of the tine body 40 in the direction of travel. List of reference symbols.

[0048] 10 sowing units

[0049] 12 aggregate carriers

[0050] 14 parallelogram rods

[0051] 16 seed storage containers

[0052] 18 Separation device

[0053] 20 storage device

[0054] 22 storage channel

[0055] 24 tine share

[0056] 26 rolling bodies

[0057] 28 Catch element

[0058] 30 Follow-up tool

[0059] 32a, 32b Follow-up tools

[0060] 34 Pre-tool

[0061] 36 rolling bodies

[0062] 38a, 38b rolling body

[0063] 40 tine bodies

[0064] 42 opening section

[0065] 44 Furrow opening edge

[0066] 46 Forming section

[0067] 48a, 48b Forming surfaces

[0068] 50 Reconsolidation section

[0069] 52 Reconsolidation area

[0070] 54 Material bridge

[0071] 56 recess

[0072] 58 Recording and positioning area

[0073] 60 Discharge opening

[0074] F direction vector a angle

Claims

[Patent Claims] Seeding unit (10) for a precision seed drill, comprising an aggregate carrier (12); a tine coulter (24) arranged on the aggregate carrier (12) for creating a furrow extending in the direction of travel for seed grains in the soil of an agricultural area; a singulation device (18) arranged on the aggregate carrier (12) for singulating seed grains; a depositing device (20) arranged on the aggregate carrier (12) for depositing the seed grains singulated by the singulation device (18) into the furrow created by the tine coulter (24); and a rolling element (26, 36, 38a, 38b) arranged on the aggregate carrier (12) for supporting the seeding unit (10) against the soil of the agricultural area and / or for depth control of the tine coulter (24); characterized in that,that the tine share (24) has a furrow opening edge (44) at its front and forming an obtuse angle (a) with the direction of travel vector (F) for opening the sowing furrow. Seeding unit (10) according to claim 1, characterized in that the tine share (24) has an opening section (42) located in a front region of the tine share (24), wherein the furrow opening edge (44) is arranged in the opening section (42), and wherein the tine share (24) has a forming section (46) behind the opening section (42) in the direction of travel, with one or more forming surfaces (48a, 48b) for forming the sowing furrow opened by the furrow opening edge (44). Seeding unit (10) according to claim 1 or 2, characterized in that the tine share (24) has, in the direction of travel, behind the opening section (42) and / or the forming section (46), a reconsolidation section (50) with one or more reconsolidation surfaces (52) for reconsolidating the soil compacted by the, The furrow opening edge (44) has an open and / or formed deposit furrow by the one or more forming surfaces (48a, 48b).

4. Seeding unit (10) according to claim 2 or 3, characterized in that the opening section (42), the forming section (46) and / or the reconsolidation section (50) are integral components of a one-piece tine body (40) of the tine share (24).

5. Seeding unit (10) according to one of the preceding claims, characterized in that the depositing device (20) has a depositing channel (22) for the separated seed grains and the depositing channel (22) is attached to the tine share (24).

6. Seeding unit (10) according to one of the preceding claims, characterized in that the singulation device (18) is configured to be operated on a differential pressure basis.

7. Seeding unit (10) according to one of the preceding claims, characterized by a seed storage container (16) arranged on the aggregate carrier (12), which is connected to the singulation device (18) via a seed conveying path; and / or a seed inlet arranged on the aggregate carrier (12), which can be connected to a central container of a seed drill and is designed to be continuously or as required supplied with seed from the central container.

8. Sowing unit (10) according to one of the preceding claims, characterized by at least one catching element (28) arranged on the aggregate carrier (12) for braking and / or pressing down the seed grains deposited into the sowing furrow via the depositing device (20).

9. Seeding unit (10) according to one of the preceding claims, characterized in that the rolling element (26, 36, 38a, 38b) is designed as a depth control roller running behind the tine share (24) in the direction of travel or as a support roller or bracket roller running laterally next to the tine share (24). Seeding unit (10) according to one of the preceding claims, characterized by at least one trailing tool (30, 32a, 32b) arranged on the aggregate carrier (12) for closing the furrow. Seeding unit (10) according to one of the preceding claims, characterized by at least one pre-tool (34) arranged on the aggregate carrier (12), which is arranged in front of the tine share (24) in the direction of travel. Seeding unit (10) according to one of the preceding claims, characterized by at least one fertilizer metering and / or fertilizer application device arranged on the aggregate carrier (12), which is preferably arranged in front of the tine share (24) in the direction of travel.A seeding unit (10) according to one of the preceding claims, characterized in that the aggregate carrier (12) is designed as a multi-part support frame. A seeding unit (10) according to one of the preceding claims, characterized by a coulter pressure sensing device by means of which the contact pressure of the seeding unit (10) or a part of the seeding unit (10) on the soil of the agricultural area can be detected, in particular by sensors; and / or a coulter pressure adjustment device by means of which the contact pressure of the seeding unit (10) or a part of the seeding unit (10) on the soil of the agricultural area can be adjusted, in particular regulated; and / or. A seeding depth adjustment device by means of which the guide depth of the tine share (24) can be adjusted to change the furrow depth of the seeding furrow; and / or one or more soil sensors by means of which soil properties can be detected sensorially. A precision seed drill with several seeding units (10) arranged side by side transversely to the direction of travel, characterized in that one, several or all seeding units (10) are designed according to one of the preceding claims.

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