The land in Canton is a hayfield, and has been for some time. So to go from sod to garlic bed we decided to double-dig. Which means you dig, well, twice. First you shovel off a layer of the sod--about 6 inches deep. Then, underneath where you just sliced that off, you dig into the sub-soil another foot or so. The layer of sod gets flipped upside down into the trench, and then buried with more soil, as you move down the line. Two people got 150 square feet of garlic bed dug in about three hours. In light rain.