Mike,
A couple more things, what are you wanting to grow in those plots? And have you got a soil test? A lot of times it takes a while to get the soil where it should be. You had mentioned hay had been made there for a while, it's a good chance that if lime and fertilizer wasn't being applied, your ground could be very depleted and may take some time to correct before clover and other plants can be successfully grown. There are some seed choices that can tolerate less than ideal conditions that can be grown while the lime becomes active in the soil and the correct fertilizer is amended.
Once we know what you have, the more options and ideas will come about and hopefully be of help to ya.
Good luck on your huntin!