A system and method of controlling an agricultural machine uses the following steps: (a) successively recording signals from at least one first sensor sensing at least one agronomic parameter of a field during an operation of the machine in the field, (b) successively recording signals from at least one second sensor sensing at least one operation parameter of the machine during the operation of the machine in the field, (c) spatially overlaying the signals of the first sensor and the second sensor, (d) determining from the overlaid values a respective zone in the field, and (e) controlling an actuator of the machine dependent on the determined zone in which the machine operates.