Global Soil Partnership.
Jonathan W. Hempel, USDA-NRCS, Lincoln, NE, Kim Green, USDA-Food Safety and Inspection Service, Beltsville, MD, Dan J. Pennock, Department of Soil Science, University of Saskatchewan, Saskatoon, SK, Canada, Thomas Reinsch, USDA-NRCS, Beltsville, MD, Charles W. Rice, 2701 Throckmorton Hall, Kansas State University, Manhattan, KS, US and David L. Lindbo, Soil and Plant Science Division, Headquarters, USDA-NRCS, Washington, DC