All my landlords want to do that and I'm OK with it. If you negotiate a raise in the rent and next year corn drops 2.00 a bushel, do you want to be stuck with that raise for the next 3 years? Why would you expect him to want to be stuck with a 3 year lease if corn goes up another 3.00? The best way to handle it if you want a longer term is to offer a flexible lease that allows him to profit if corn goes up and allows you some relief if prices go down.

Just my 2 cents......