FILE - A July 19, 2012, file photo shows a corn field near Springfield, Neb. The USDA is releasing its first estimate of the 2013 crop size in its spring planting report on Thursday, Ma

 

              FILE - A July 19, 2012, file photo shows a corn field near Springfield, Neb. The USDA is releasing its first estimate of the 2013 crop size in its spring planting report on Thursday, Ma
FILE - A July 19, 2012, file photo shows a corn field near Springfield, Neb. The USDA is releasing its first estimate of the 2013 crop size in its spring planting report on Thursday, March 28, 2013. (AP Photo/Nati Harnik, file)
Tags: USDA , corn