RE: S.E. Ohio red clay plots
Beaverdamva is correct about changing all but the smallest plots.Organic matter (hay, manure or just a crop of clover/alfalfa/sweet clover/buckwheat is better). I agree with Highcotton in keeping it no till as much as possible. I was talking about the initial tillagebefore planting a perennial like clover. After that keep it mowed, lime, fertilize and top seed. You could burn the present vegetation off rather than tilling but you'll still need to disc the seed in. Check back on the posts that Rob/PA Bowyerposted as he followed that method with excellent results.
Dan O.