Abstract: Planter apparatus (10) including a plurality of pivotally mounted arms (22, 24) each having a disc unit (26) arranged on an outboard end thereof has each of the arms constructed with horizontal and angular portions (28, 30 and 32, 34) disposed at such an angle with respect to one another that the horizontal portion experiences greatly reduced side forces. The lighter construction of the arms thus afforded permits inclusion of a fine adjustment in the resilient control arrangement (58) associated with each of the arms, with this fine adjustment preferably being obtained by use of torsion springs (62) associated with each of the arms. A stop assembly (48) is provided inboard of the pivot point of each of the arms for potential abutment with an associated subframe (16) of the apparatus in order to limit downward swinging movement of an associated disc unit in the event of disengagement or other failure of the primary motion control system of the arms.

Abstract: An apparatus for planting seed having a frame adapted to be mounted on a vehicle for transport over the earth in a predetermined direction of travel, a source of seed, a furrowing assembly, an arm borne by the frame mounting the furrowing assembly for movement to and from earth engagement when the frame is mounted on a vehicle, and a conduit interconnecting the source of seed and the furrowing assembly for distributing seed from the source into a furrow formed in the earth by the furrowing assembly during transport of the frame with the vehicle over the earth.