For underground placement of treated bait for gophers. The Armstrong Ag RR (Rodent Ridder) uses a 20" coulter to slice through the root & grass mat. This minimizes ground disturbances by the shank. The drop tube is attached, directly to the hopper: which eliminates spillage. Also, the hopper is attached directly to the shank & has a spill proof lid. The drive/packer wheel has a unique design allowing for better traction & lessens tunnel collapses.