If you was wanting to start a plot now you could go with a mix of 40lbs of cowpeas, 10lbs of Lablab, and 5lbs of grain sorgham per acre. That might get you by till late summer and then follow Timbers recommendation which I believe is going to be hard to beat.

I would seriously consider getting a soil test ASAP just to give you some idea what you are working with and save you allot of money down the road.

Good luck!!