Heather D. Karsten, Department of Plant Science, Pennsylvania State University, University Park, PA, US, Glenna M. Malcolm, Biology, Pennsylvania State University, University Park, PA, Douglas B. Beegle, Plant Science, Pennsylvania State University, University Park, PA, William S Curran, Plant Sciences Department, Pennsylvania State University, University Park, PA, Curtis J. Dell, USDA-ARS Pasture Systems & Watershed Mgmt Research Unit, State College, PA, US, Ronald J. Hoover, Plant Science, The Pennsylvania State University, University Park, PA, Virginia Ishler, Animal Science, The Pennsylvania State University, University Park, PA, Peter J. A. Kleinman, USDA-ARS-Soil Management and Sugarbeet Research Unit, USDA-ARS, Fort Collins, CO, Thomas Richard, Agricultural and Biological Engineering, The Pennsylvania State University, University Park, PA and John Tooker, The Pennsylvania State University, University Park, PA