Abstract: A dispenser assembly particularly adapted to selectively dispense predetermined amounts of dry fertilizer or other dry material onto an area of disbursement, such as a plant, and including an elongated dispensing conduit having a holding chamber of predetermined dimension connected thereto along with a control mechanism such that selective operation of the control mechanism will automatically dispense, by gravity, a premeasured amount of dry material onto the disbursement area. A double disk valve means is provided having an inlet valve and an outlet valve simultaneously translatable to open one end of the holding chamber and close the respective other end. A gun-shaped valve means is provided as the control mechanism in a preferred embodiment.