1. USDA‐ARS Sustainable Agricultural Systems Laboratory Beltsville MD 20705 USA
2. USDA‐ARS Southeast Watershed Research Laboratory Tifton GA 31793 USA
3. USDA‐ARS National Soil Dynamics Laboratory Auburn AL 36832 USA
4. Oklahoma Agricultural Experiment Station Field and Research Service Units Stillwater OK 74078 USA
5. USDA‐ARS, J. Phil Campbell Sr. Natural Resource Conservation Center Watkinsville GA 30677 USA