The rotary tiller type GF 800 is suitable as a full width tiller for an optimum seedbed preparation for the cultivation of various vegetables and potatoes. An ideal prepared seedbed is the prerequisite for optimum development of the seed resp. planting tubers. Through intensive soil cultivation, root crop ground preparation is perfectly achieved so that undisturbed growth of the crop can be guaranteed. For conventional hilling (in a second working step) the rotary tiller GF 800 can be modified to be used as a rotary hiller. The machine can be converted from independent rows to a full width tiller with a few simple steps. The power transmission is designed for tractor outputs up to 500 HP. Highest acreage outputs combined with fast transfers from field to field make this machine one of the most powerful rotary tillers on the market. The large working width and the hydraulically foldable main frame make this possible.