Abstract: Systems and structures for elongate boom mounting, deploying and recovery for agricultural equipment, such systems mountable either at the front or rear end of a powered or towed vehicle; mounting masts and frame structures associated therewith for pivotally mounting elongate booms on mobile equipment in deployable and recoverable fashion, such utilizing manual operator power rather than power cylinders and the like; a frame for mounting elongate booms including a pair of rearwardly inclined boom support members, a pair of transverse upper and lower beam members connecting the upper and lower ends of the boom support members and a pair of horizontal, spaced apart, forwardly extending axial beams each connected to an upper end of one of the boom support members, sets of cables coupling the booms with the frame members, the inner ends of the booms pivotally mounted on the lower ends of the boom support members.