we have a 100acre pasture that is the result of letting a field fallow. its sandy land, and the owners before us just let it go for years b/c they had no way to get to their land. at some point they had some coastal back there before it grew up. we cleaned it up and farmed cotton one year and peanuts one year. then we decided it would make a better pasture than anything and let the bermuda take over. it did a pretty good job on its on. but now there is some carpet grass and centipede starting to choke it out in some spots. i think if i harrow it all up the bermuda will jump back fast and take over the other spots. when is the best time to do that, in the spring?