It can be done without a dozer, I have two plots that I cleared with a chainsaw. Itis alot of work, but it can be done. I use a chisel plow when I work them up to plant. The chisel does a better job than the disc on these two plots. Its been 3 years since I cleared them and this past fall several of the root wads pulled up out the ground by the chisel. I cut the trees as close to the ground as possible then piled them up and had a big bon fire. Dozer work around here is 80 bucks an hour.