In one embodiment, a straw chopper apparatus of a combine harvester, the straw chopper apparatus comprising plural chopper rotors disposed proximally to a rearward end of the combine harvester, each of the chopper rotors comprising a shaft having an axis of rotation substantially parallel to the direction of travel, the shaft having a length dimension and a diameter dimension, the length dimension greater than the diameter dimension, the shaft comprising plural sets of blades that are pivotably coupled to the shaft.
