Patrick M. Ewing, Department of Agronomy and Plant Genetics, Michigan State University, Brookings, SD, Meng Li, Crop Sciences, Pennsylvania State University, State College, PA, US, Lesley W. Atwood, Natural Resources and the Environment, University of New Hampshire, Durham, NH, Adam Davis, USDA-ARS Global Change and Photosynthesis Research Unit, Urbana, IL, Nicholas R. Jordan, Department of Agronomy and Plant Genetics, University of Minnesota, Saint Paul, MN, David A. Mortensen, Plant Science, Pennsylvania State University, University Park, PA and Richard G. Smith, Natural Resources and Environment, University of New Hampshire, Durham, NH, US