Abstract: A folding tool bar system for agricultural use includes a cross frame rigidly secured to a main frame at a position forward of the support wheels and rear-folding wings. Ground implements are mounted on the wings and cross frame at equal lateral spacing across the entire system when the wings are extended for use. The innermost sections of the wings are free of implements to facilitate folding the wings rearwardly for road travel without interference between the wheels and the center implements.

Abstract: A plow system includes a number of individual plow units mounted on a beam which is inclined relative to the direction of travel of a traction vehicle. The units are mounted for continuous rotation about vertical axes so that they may be opened or closed to adjust the width of a cut between adjacent units over a continuous, wide range. The plow unit is supported by a forward furrow wheel located to ride in previously-plowed ground and a rear furrow wheel, and the main frame is pulled by a tongue or draft member connected between a tractor hitch and an intermediate location of the inclined beam. A hydraulic unit adjusts the individual plow units in unison, and at the same time, through a linkage, adjusts the tongue relative to the inclined beam to keep the forward furrow wheel at a constant distance from the rear tractor wheel for all width adjustments.