Abstract: A crop spray apparatus is provided having controls for varying the height of a spray device and an operator's cab, which are pivotally mounted on opposite sides of a drive assembly. The controls are located in the operator's cab for continuing control of changes in height of the spray device and the operator's cab from the operator's cab while the drive assembly is moving the apparatus and while simultaneously spraying. By this control, both high and low level crops may be sprayed continuously without need for stopping operation of the crop spray apparatus to vary the height of the equipment.