Ruoyu Wang, University of California, Davis, Davis, United States, Ronald Bingner, USDA-ARS-National Sedimentation Laboratory, Oxford, United States, Glenn Herring, USDA-ARS-National Sedimentation Laboratory, Oxford, MS, United States, Yongping Yuan, US Environmental Protection Agency, Research Triangle Park, NC, United States, Yuzhou Luo, DPR EM 3B, Sacramento, CA, United States, Martin A Locke, Agricultural Research Service, Oxford, MS, United States and Minghua Zhang, Chuncheon, Korea, Republic of (South)