The U.S. Energy Information Administration (EIA) released its winter fuels outlook last week, forecasting rising prices for several key agricultural inputs.    First, natural gas will continue pushing up nitrogen fertilizer prices. While there are a number of factors at play in fertilizer prices including supply and delivery, crop prices, trade investigations (as WPI covered here), and natural gas, with the latter leading the way higher. 

EIA is basing its forecast on colder than expected weather this winter and predicts natural gas prices will continue to climb.  The front-month natural gas futures contract for delivery at the Henry Hub averaged $5.11/MMBtu during September and was $5.68/MMBtu to close last week.&nb...