A pair of spaced opposing upstanding surfaces are provided and an inclined upwardly facing ramp surface extends therebetween and includes a lower marginal edge. A partial cylindrical wall extends axially between the upstanding surfaces and opens in a generally horizontal direction between and paralleling the upstanding surfaces. The partial cylindrical wall includes an upper marginal edge portion registered with the lower marginal edge of the inclined ramp surface and a generally radially partitioned feed wheel is journaled between the upstanding surfaces and has one side thereof closely embraced by the partial cylindrical wall. Drive structure drivingly rotates the wheel in a direction to move the upper radial partitions thereof in the general direction in which the partial cylindrical wall opens and a gravity discharge outlet is spaced above the wheel and the area between the upstanding surfaces above the lower portion of the inclined ramp surface. The gravity discharge outlet is shiftable, relative to the wheel ramp surface, in a horizontal direction paralleling the direction in which the partial cylindrical wall opens, and includes a vertically adjustable gate extending across the side of the discharge outlet facing in the direction in which the partial cylindrical wall opens movable toward and away from the upper periphery of the wheel.