Harper straw blowers process bales quickly and provide great coverage with even distribution and no clumping. Coverage rates are approximately 1,000 square feet per bale, and processing time is up to 2 bales per minute with the PTO and small gas powered models. These units can fit easily in the bed of a pickup truck, or on a utility trailer. The heart of the bale processor is a rotor with 32 knives. The bale tub rotates evenly while the knives quickly cut and blow the material out.