Ray G. Anderson, US Salinity Laboratory, Contaminant Fate and Transport, USDA-Agricultural Research Service, Riverside, CA, Dong Wang, Water Management Research Unit, USDA-ARS, Parlier, CA, Rebecca Tirado-Corbala, Department of Agro-Environmental Sciences, Agricultural Experiment Station, University of Puerto Rico-Mayaguez, Mayaguez, PR, US, Huihui Zhang, USDA - United States Department of Agriculture, Fort Collins, CO and Jim Ayars, USDA-ARS, Parlier, CA