A plow (P) sits down on movable slats (10) of a reciprocating slat conveyor formed of the movable slats (10) and fixed slats (12) which are between the movable slats (10). The movable slats (10) and fixed slats (12) define valley regions between the movable slats (10). The plow (P) has fingers (92, 106) which extend into the valley regions. During the unloading operations, the plow (P) is moved rearwardly by the moveable slats (10), together with the load (L) that is on the conveyor. When the plow (P) reaches the rear end of the conveyor, it tips rearwardly and discharges the remaining portions of the load (L) off from the conveyor. Then, a teather (T) is wound onto a winch and used for pulling the plow (P) forwardly back into a forward parked position (FIG. 15).