**Acknowledgements**

This work was conducted as part of the activities of the USDA Natural Resources Conservation Service Conservation Effects Assessment Project (NRCS-CEAP), Interagency Reimbursable Agreement #60-3098-5-006. This work was also supported in part by an appointment to Agricultural Research Service administered by Oak Ridge Institute for Science and Education through interagency agreement between U.S.Department of Energy (DOE) and U.S.Department of Agriculture (USDA), Agricultural Research Service Agreement #60-3098-5-002.
