Abstract: This invention relates to a pneumatic soil penetrator and chemical applicator assembly operable, for example, to penetrate a soil surface and discharge a chemical toward the root system on a tree member or to broadcast the chemical about a large area. The pneumatic soil penetrator and chemical applicator assembly includes (1) a penetrator and applicator connected to a pneumatic supply to provide air pressure thereto; and (2) a chemical supply connected to the penetrator and applicator. The penetrator and applicator includes a main gun assembly having a primary inlet assembly; a main discharge assembly; and a control handle assembly in order to provide for selective control of fluid and chemical flow for (1) conveyance of the fluid flow and chemical therethrough; and (2) high pressure fluid flow to be used in a digging or penetration of the soil area.