Add Yahoo as a preferred source to see more of our stories on Google. BISMARCK, N. D. (AP) -- Tennessee farmer Todd Littleton expects to pay $100,000 more for fertilizer this season, a 40% spike from his bill last year thanks to the war in Iran -- and he is scrambling to cover that extra cost.

The ongoing war in Iran is driving up more than just the cost of oil. With essential crop fertilizers also caught in the crossfire, U.