Combine harvester with a distributor for residue material

A combine harvester comprising a harvester head, a threshing and separating assembly configured to receive crop picked up from a field via the harvester head, a straw chopper configured to process residual material which is discharged by the threshing and separating assembly, and a distributor configured to distribute the residual material discharged by the straw chopper over the field,

• wherein the distributor includes one or more actuators configured to influence a distribution of the residual material over the field,
• wherein the one or more actuators are configured to be controlled by a control unit, the control unit is configured to be operated according to a first operating mode or a second operating mode
• wherein, in the first operating mode, the control unit is configured to control the one or more actuators on the basis of an output signals from one or more sensor, the one or more sensors configured to detect the distribution of the residual material that is achieved on the field,
• wherein, in the second operating mode, the control unit is configured to control the one or more actuators on the basis of operating data of the combine harvester and data relating to the crop or the topography of the field that is stored in a location-specific manner in a memory, and wherein the control unit (174) is configured to change automatically between the first operating mode and the second operating mode in response to a first signal relating to the quality of the output signals from the one or more sensors.