[1] USDA ARS, Off Natl Programs, Nat Resources & Sustainable Agr Syst, 5601 Sunnyside Ave, Beltsville, MD 20705 USA
[2] USDA ARS, Hydrol & Remote Sensing Lab, Beltsville, MD USA
[3] USDA ARS, Soil Management & Sugarbeet Res Unit, Ft Collins, CO USA
[4] USDA ARS, Cropping Syst & Water Qual Res Unit, Columbia, MO USA
[5] USDA ARS, Range Management Res Unit, Las Cruces, NM USA
[6] USDA ARS, Southeast Watershed Res Lab, Tifton, GA USA