Ive got the same deal right now. Ill tell you what Im gonna do. Bushhog so the wheat will be cut down lower and will allow the clover to take off better. Then just broadcast buckwheat into at about 50% of the recommended rate rite before a rain. Ill sow buckwheat heavier into any thin spots. One reason for this is that my deer really like buckwheat and because I expect another summer drought that clover just wont make it through in my fields but buckwheat will.