Abstract: A row unit for a high-speed agricultural seeder includes a leading system including an opener and a dispenser, a trailing system including a leveler and a packer, a primary force generator generating a primary force, and a packer force adjustment system generating a packer adjustment force. The primary force includes opener and trailing force portions that are transferred to the opener and trailing system, respectively. The trailing force portion includes a leveler force portion that is transferred to the leveler and a packer force portion that is transferred to the packer. The packer adjustment force is adjustable independently of the leveler force portion, such that a combined packer force equal to a sum of the packer force portion and the packer adjustment force is adjustable independent of the leveler force portion.

Abstract: A row unit for a high-speed agricultural seeder includes a leading system including an opener and a dispenser, a trailing system including a leveler and a packer, a primary force generator generating a primary force, and a packer force adjustment system generating a packer adjustment force. The primary force includes opener and trailing force portions that are transferred to the opener and trailing system, respectively. The trailing force portion includes a leveler force portion that is transferred to the leveler and a packer force portion that is transferred to the packer. The packer adjustment force is adjustable independently of the leveler force portion, such that a combined packer force equal to a sum of the packer force portion and the packer adjustment force is adjustable independent of the leveler force portion.

Abstract: A disk opener includes a disk blade for creating a furrow and a closing wheel for closing it. An injection zone is defined generally below and up to slightly forward of the closing wheel. An anhydrous ammonia injector is mounted between the blade and the wheel and delivers anhydrous ammonia via a delivery tube into the furrow at an injection point within the injection zone. The injection point is also preferably centered within the furrow.