Abstract: An agricultural implement for movement through a field is adapted to perform a number of functions including severing plant stems from the roots, placing the severed plants in windrows, and preparing soil for planting. The apparatus includes a wheel-mounted frame for attachment to a tractor, a pair of flat discs with notched peripheries mounted for rotation about parallel axes and hydraulic motors for imparting rotation, through drive shafts, to the discs in opposite directions. The discs and their supporting structure are mounted for selectively adjustable movement to vary the spacing of the axes of rotation, thereby placing the disc peripheries in either overlapped or spaced relation. The variable positioning of the disc peripheries governs the function performed by the apparatus and may be augmented by using discs of different diameters as well as by adjusting the spacing of the rotational axes.

Abstract: A root picker includes a main frame supporting within it a triangular picker frame pivoted on the main frame at one apex with a lower and rearwardly positioned apex supporting a picker roller which is rotated to pick stones from the ground. A conveyor chain supporting transverse bars with outwardly extending teeth is pivotally mounted adjacent the third apex of the frame upwardly and rearwardly of the picker roller so that the chain turns around an axis at a position alongside the picker roller to lift rocks between the conveyor chain and the picker roller onto a surface which leads up to a bucket. The frame pivots to lift the conveyor chain and the picker roller away from the ground and also the conveyor chain is pivotal relative to the frame to increase the spacing between the chain and the picker roller. Rotating sweep drums are positioned forwardly and outwardly of the frame to pick and sweep rocks into the picker roller.