Abstract: A homogenizing mechanism for a manure slurry in combination with a supply container and blades adapted to penetrate about fifteen centimeters under the soil surface for injecting manure into the soil by an injection pipe carried by the blade. The mechanism is disposed between container and the injection outlet so that the injected slurry must pass therethrough. An air displacement pump selectively places the container under pressure (up to about one atmosphere) or vacuum for moving the slurry out of or into the container, respectively. The homogenizing mechanism has a substantially cylindrical casing with an inlet from the container on one end and an outlet leading to the injector at the other end. The inlet may be a conduit or an open end of a casing mounted in part within the container.