Ana B. Wingeyer, EEA- Parana, Instituto Nacional de TecnologĂa Agropecuaria, Entre Rios, Argentina, Martha Mamo, 279 Plant Science, University of Nebraska-Lincoln, Lincoln, NE, Jeffrey Bradshaw, University of Nebraska - Lincoln, Scottsbluff, NE, Walter Schacht, Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, Jerry Volesky, University of Nebraska - Lincoln, North Platte, NE, John A. Guretzky, University of Nebraska-Lincoln, University of Nebraska-Lincoln, Lincoln, NE, US, Richard B. Ferguson, Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, Haishun Yang, Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, US, Kent Eskridge, Department of Statistics, University of Nebraska - Lincoln, Lincoln, NE, Sean Whipple, ISK Biosciences, Kearney, MO and Karla Jenkins, Panhandle Research & Extension Center, University of Nebraska- Lincoln, Scottsbluff, NE