First get a soil test if you can. It probably will need lime - because corn can be grown on more acidic soils than, say, clover - and its likely the soil Ph was not corrected for corn.

If corn was planted 2 years ago - it was probably sprayed for weeds - so grasses (your worst enemy) should not be a big problem - and you may be able to disk the plot bare - for a good spring clover plot. (instead of plowing).

I'd probably suggest a quality clover planting - like Imperial Whitetail Clover - or any good White Clover blend. Don't use Nitrogen based fertilizer, your soil test will indicate how much Phosphorus (P) and Potassium (K) you will need to add - but figure on 60-100 lbs/acre of eacheach. Prepare the soil - spread lime/fertilizer - and roll it - then seed clover - and roll it again. The perfect planting will be planted 1-2 days before a soft - day-long rain.

If you are interested in a fall planting - its tough to beat Wheat - planted in late August or Early Sept.

Others will give you some other good options - but this is a start. You can google search "Spring clover planting" and get TONs of good info - We can help some too.

FH