Abstract: A material handling system includes a hopper assembly for mounting on a vehicle bed. The hopper assembly has a rear leg for mounting on a rear end wall of the vehicle bed and a side leg for mounting on a sidewall of the vehicle bed. The hopper legs intersect at a corner which can be mounted adjacent to a rear corner of a vehicle bed. The hopper assembly includes an interior with a lowest point in the hopper assembly corner. A conveyor assembly includes a proximate end received in the hopper side leg and extending to the hopper corner. The conveyor assembly can be adjustably mounted on the vehicle bed sidewall for discharging material to various locations alongside the vehicle.