Charles Francis, University of Nebraska-Lincoln, Lincoln, NE, Geir Liblein, Institute of Plant Science (IPM), Norwegian University of Life Sciences (UMB), 1432 Aas, Norway, Tor Arvid Breland, Institute of Plant Science (IPM), Norwegian University of Life Sciences (UMB), N1432 Aas, Norway, Lennart Salomonsson, Swedish University of Agricultural Science, Uppsala, Sweden, Mary Wiedenhoeft, Iowa State University, Ames, IA, Paul Porter, University of Minnesota, St. Paul, MN and Robert De Haan, Environmental Science, Cordt College, Sioux Center, IA