Roland Baatz, Forschungszentrum Jülich GmbH, Jülich 52428, Germany, Ana Maria Tarquis, UPM, Madrid, Spain, Anne Verhoef, The University of Reading, Department of Geography and Environmental Science, Reading, United Kingdom, Scott L Painter, Oak Ridge National Laboratory, Oak Ridge, TN, United States, Umakant Mishra, Argonne National Laboratory, Environmental Science Division, Argonne, IL, United States, Jiri Simunek, Department of Environmental Sciences, University of California Riverside, Riverside, CA, United States, Jan Vanderborght, Forschungszentrum Jülich GmbH, Agrosphere (IBG-3), Institute of Bio- and Geosciences, Jülich, Germany, Ute Wollschlaeger, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany, Dani Or, ETH Zurich, Soil and Terrestrial Environmental Physics (STEP), Zürich, Switzerland, Martine J van der Ploeg, Wageningen University, Wageningen, Netherlands, Michael Young, University of Texas at Austin, Bureau of Economic Geology, Austin, TX, United States, Teamrat A Ghezzehei, University of California, Merced, Merced, CA, United States and Harry Vereecken, Forschungszentrum Julich GmbH, Agrosphere (IBG-3), Institute of Bio- and Geosciences, Julich, Germany