Affiliation: | (1) Agronomy Department, Iowa State University, Ames, IA 50011, USA e-mail: pap@iastate.edu Tel.: +1 515-294-9652, Fax: +1 515-294-2299, Present address: P.A. Peterson, Department of Agronomy, 100 Osborn Road, Iowa State University, Ames, Iowa, 50011-1010, USA, US;(2) Monsanto Company, 101 Tomaras Avenue, Savoy, IL 61874; USA, US;(3) Holden’s Foundation Seeds, Williamsburg, Iowa, USA, US |