In this Monday, July 8, 2013 photo, Scott McGill holds hard red winter wheat and chaff during harvest on his uncle Stan McGill's farm north of Waverly, Neb. (Gwyneth Roberts/The Journal-Star via AP)
In this Monday, July 8, 2013 photo, John Catsinas harvests 24 acres of hard red winter wheat on Stan McGill's farm north of Waverly, Neb. (Gwyneth Roberts/Lincoln Journal Star/The Journal-Star via AP)