Abstract: A soil injection apparatus for injecting solids, liquids or mixtures beneath the surface of the ground, the apparatus having one or more injector lances mounted to a skid plate, such that the lances can be forced into the ground using hydraulic cylinders, and storage tanks to retain materials to be injected, the material being delivered into the lances and the ground using compressed air. A viewing tube is provided such that the operator can visually determine the correct amount of material to be injected. The apparatus is readily mountable to tractors, front-end loaders, forklifts and similar vehicles.