The method involves adjusting the machine according to the location and area using machine specific data held in the memory of a computer (6). The processing and/or distribution machine is controlled and/or regulated according to the stored data. A position sensor (13) generates field coordinate signals giving the relative position of the vehicle (7,8) in the field. The control and/or regulation is conducted depending on the current position. The computer stores the sowing depth against position and controls the machine's blade pressure accordingly.