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

 

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