ผู้เขียน: Sharon A. Clay

David E. Clay, Ph D, is a Distinguished Professor of Soil Science and South Dakota Corn Council Endowed Chair of Precision Farming at South Dakota State University in Brookings, South Dakota, USA. Thomas M. De Sutter, Ph D, is the Soil Science Program Leader and a Professor at North Dakota State University in Fargo, North Dakota, USA. Sharon A. Clay, Ph D, is a Distinguished Professor of Weed Science at South Dakota State University in Brookings, South Dakota, USA. Thandiwe Nleya, Ph D, is a Professor of Agronomy at South Dakota State University in Brookings, South Dakota, USA.