A granular and liquid material spreading system mounted on a vehicle is disclosed. Granular material is moved from a hopper to delivery means by a hydraulic system. The hydraulic system for a granular material delivery system is selectively used by a liquid delivery system to operate a liquid pump to move the liquid material to the delivery position. The amount of liquid delivered is dependent upon the feed rate of the granular material delivery system. Variation of the liquid feed rate may be changed within a predetermined range. The level of liquid may be sensed to disengage the liquid delivery system. In one embodiment, the hydraulic system fluid is diverted to power the liquid delivery system, slowing the feed rate of the granular delivery system and the amount of granular material used. In another embodiment the hydraulic system is used to control the liquid feed rate.