Looks like the rig I made for spraying termites and the nozzle I made for washing a line under a sidewalk or driveway. A piece of pipe with a valve and a spray nozzle on the end. Make one for a few bucks. But it won't work in heavy clay and will leave you with a big muddy area in half your yard. Could work in sand I suppose. Put a regular spray nozzle on your hose and try digging a hole as deep as your arm to test it. See if you can stick a post into it.