Department of Soils, Water and Engineering, University of Arizona, Tucson, USA
W. R. Gardner
Department of Botany and Plant Sciences, University of California, Riverside, USA
A. E. Hall
Department of Land, Air and Water Resources, University of California, Davis, CA, 95616, USA
Donald R. Nielsen
Department of Soil Physics, Institute of Soils and Water, Agricultural Research Organization, Bet Dagan, Israel
A. Hadas
Agricultural Research Service, Mountain States Area, 2625 Redwing Road, Fort Collins, CO, 80526, USA
Jan van Schilfgaarde
CSIRO Division of Tropical Crops and Pastures, Qld 4067, St. Lucia, Australia
M. M. Ludlow