1. An apparatus comprising: a harvester comprising a movable stripper plate; an actuator to adjust positioning of the movable stripper plate based upon at least one of sensed crop attribute values or derived crop attribute values; a first row unit comprising the movable stripper plate, a first sensor associated with the first row unit and the actuator, wherein the actuator is to automatically move the stripper plate based upon signals from the first sensor; and a second row unit comprising a second movable stripper plate, a second sensor associated with the second row unit and a second actuator, the second actuator to automatically move the second stripper plate based upon signals from the second sensor, wherein the second actuator is to move the second stripper plate of the second row unit independent of movement of the stripper plate of the first row unit to provide the first row unit and the second row unit with different stripper plate spacings, wherein the actuator is to automatically move the stripper plate based upon a first determined grain yield value associated with the first row unit and wherein the second actuator is to automatically move the second stripper plate based upon a second determined grain yield value, different than the first determined grain yield value, associated with the second row unit.