By John O’Connell Capital Press General Mills has sold its Idaho grain operations to Agspring, based in Kansas City, Ks. Officials with a company that is buying all of General Mills’ Idaho grain operations say they intend to increase storage and handling capacity of the elevators. Agspring, LLC, of Kansas City, Kan., intends to complete the transaction by May, purchasing General Mills grain elevators in Pocatello, Rockford, American Falls, Newdale, Blackfoot, and Idaho Falls, as well