Abstract: A dispenser which fits between the box of a dump truck and its partially open tailgate includes a semicylindrical trough having an axially elongated slot in the bottom, an arcuate relatively narrow cover adjacent to and outside of the trough, end plates on the trough, end hangers supporting the cover and pivotally mounted on axles in the end plates, and a handle on one of the end hangers to rotate the cover to open and close the slot. A notched detent bar on an end plate holds the handle in selected positions. Clamps hold the structure to the tailgate and latch bars cooperate with latch hooks on the truck to hold the dispenser in place. A cage hooks on the tailgate to support an operator. Interior hook eyes are provided to lift the dispenser into attachment position on the truck.