Good advice - rotate every 4 years - plant something different for 2 years at least.

When Nitrogen gets too high in the soil(clover adds it - like was said) - the clover gets outcompeted - especially by grasses.

Brassicas, & corn like Nitrogen alot - and can work great in a crop rotation with clover. You should not need much fertilizer (unless you bail the clover off the field).

Look at the post I put on tonight about rotation - it might provide you with some pictoral advice on your plot.


FH