Curtis J. Dell, USDA-ARS Pasture Systems & Watershed Mgmt Research Unit, State College, PA, US, Alejandra Ponce de Leon, Plant Science Department, Penn State University, Univeristy Park, PA, Emily Duncan, Ecosystem Science and Management Department, Penn State University, University Park, PA, Douglas B. Beegle, Plant Science, Pennsylvania State University, University Park, PA, Heather D. Karsten, Department of Plant Science, Pennsylvania State University, University Park, PA, US and Peter J. A. Kleinman, Pasture Systems and Watershed Management Research Unit, USDA-ARS, University Park, PA