I would cut it up as deep as I could with an offset disc RIGHT NOW, then come back in three or so weeks and cut it with a disc a couple of times to get it in better shape and plant with a grain drill. You didn't say where you are, howbig the plot isor what you are planting for the fall plot. You should have done a soil test in the early spring and limed and cut it in, but you should have something to hunt over at least this fall. With it cooling soon after planting you shouldn't have a big weed problem.