Humberto Blanco is a Professor of Soil Management and Applied Soil Physics in the Department of Agronomy and Horticulture, University of Nebraska-Lincoln, USA. Sandeep Kumar is an Associate Professor of Soil Biophysics and Hydrology in the Department of Agronomy, Horticulture and Plant Science at South Dakota State University, USA. Stephen H. Anderson is the William A. Albrecht Distinguished Professor of Soil and Environmental Sciences in the School of Natural Resources at the University of Missouri, USA.