Seed orientation system for agricultural planters
A seed orientation system for an agricultural planter includes a seed orientation coil assembly defining a helical pathway. As seed from a seed source enters the seed orientation coil assembly, air flow from an air source is directed toward the seed causing the seed to orient as the seed moves along the helical pathway toward a seed exit. Upon exiting the seed orientation coil assembly, the seed is deposited into the seed furrow with the seed tip-down and with germ of the seed facing an adjacent row. The seed orientation system may be retrofitted onto existing planter row units.
1. A method of planting seed in an oriented position with a planter row unit traveling in a forward direction of travel, the method comprising:
with a furrow opener disposed on the planter row unit, forming a furrow in a soil surface as the planter row unit travels in a forward direction of travel;
collecting the seed in a seed collector from a seed source;
delivering pressurized air into the seed collector to propel the seed from the seed collector into a seed orientation coil assembly, the seed orientation coil assembly defining a curved pathway toward a seed exit path;
with a sub-furrow opener, scoring a wedge-shaped sub-furrow within the previously formed furrow adjacent to the seed exit path;
delivering pressurized air into the seed orientation coil assembly, at least a portion of the pressurized air delivered into the seed orientation coil assembly includes a parallel air flow component directed parallel to the curved pathway, the parallel air flow component propelling the seed toward the seed exit path, whereupon the seed exits through said seed exit path and is captured within the wedge-shaped sub-furrow.
2. The method of claim 1 , wherein the curved pathway includes a seed riding surface, wherein the seed engages with the seed riding surface as the seed is propelled along the curved pathway toward the seed exit path.
3. The method of claim 2 , wherein the curved pathway further includes a seed guide wall that adjoins to the seed riding surface, and wherein the seed engages with the seed guide wall as the seed is propelled along the curved pathway toward the seed exit path.
4. The method of claim 3 , wherein the pressurized air delivered into the seed orientation coil assembly includes a transverse air flow component directed transverse to the curved pathway, wherein the transverse air flow component assists in forcing the seed radially outward in engagement with the seed guide wall.
5. The method of claim 4 , wherein the curved pathway of the seed orientation coil assembly is defined by an outer coil with a central aperture in which an injector core is disposed, wherein the injector core includes nozzles delivering the parallel air flow component and the transverse air flow component into the curved pathway.
6. The method of claim 1 , wherein an outer wall of the curved pathway includes vents, the vents venting at least some of the pressurized air delivered into the seed orientation coil assembly.
7. The method of claim 1 , wherein, as the seed is propelled along the curved pathway, the seed is oriented such that, upon exiting through the seed exit path, a tip of the seed is oriented down toward the wedge-shaped sub-furrow and the seed is captured within the wedge-shaped sub-furrow tip-down.
8. The method of claim 1 , wherein the seed collector includes:
a housing having a seed entrance aperture and a seed exit aperture, wherein the seed entrance aperture is sized to mate with a seed tube on the planter row unit, the seed tube receiving the seed from a seed meter on the planter row unit;
a seed transfer tube connected between the seed exit aperture and the seed orientation coil assembly, the seed transfer tube communicating the seed from the seed collector to the seed orientation coil assembly.
9. The method of claim 1 , wherein the seed collector includes:
a seed transfer tube disposed to receive the seed from a seed meter on the planter row unit.