Jerry L. Hatfield1, Bruno Basso2, Sotiris V. Archontoulis3, Christian Dold4, John H. Prueger4 and Thomas J. Sauer5, (1)National Laboratory for Agriculture and the Environment, Agriculture Research Service, USDA-ARS, Ames, IA, (2)Earth and Environmental Science, Michigan State University, East Lansing, MI, US, (3)Department of Agronomy, Iowa State University, Ames, IA, (4)USDA-ARS National Laboratory for Agriculture and the Environment, Ames, IA, (5)USDA-ARS National Laboratory for Agriculture and the Environment, Ames, IA, US