Beside a road off Pa. Route 34, somewhere north of Gettysburg, Don Yost and John Deere team up to pull a chisel plow through a field of corn stubble.
Last year was no-till for the field, and the crop was corn. No-till means the ground is left unturned, the roots of the previous crop keep the hillside from flowing to the bottom in heavy rains, and new seed poked into the earth with a tool made for the task.