I used a grapple on my tractor and piled as much as I could up on the stumps and burned the piles. Then I just spread bahia grass seed and disced and drug it in. I built a 5' single offset plow out of a fire break plow, and then pulled a 250 gal 5' chopper behind that. After 5 years I shank plowed the pastures and picked up a few stumps and roots. Now I bale hay off of those fields. Jogeephus told me the secret, don't get in a hurry, cows can eat around stumps.