1. Soil Insight, LLC, Washington D.C., USA
2. USDA- Agricultural Research Service, Beltsville Agricultural Research Center, Hydrology and Remote Sensing Laboratory, Beltsville, USA
3. USDA- Agricultural Research Service -Grazinglands Research Laboratory, El Reno, USA
4. USDA- Agricultural Research Service -Southeast Watershed Research Laboratory, Tifton, USA
5. USDA- Agricultural Research Service -Southwest Watershed Research Center, Tucson, USA
6. USDA- Agricultural Research Service -Northwest Watershed Research Laboratory, Boise, USA
7. USDA- Agricultural Research Service -National Soil Erosion Research Laboratory, West Lafayette, USA
8. USDA- Agricultural Research Service -National Laboratory for Agriculture and Environment, Ames, USA