https://digitalcommons.unl.edu/usdaarsfacpub/1381/
"Indices for Soil Management Decisions" by Douglas L. Karlen, Brian J. Wienhold et al.
Global efforts to identify and develop soil quality indices that can accurately and efficiently quantify effects of soil and crop management began to emerge...
https://digitalcommons.unl.edu/usdaarsfacpub/1783/
"Vulnerability of crops and croplands in the US Northern Plains to pred" by Brian J. Wienhold,...
The states of Colorado, Montana, Nebraska, North Dakota, South Dakota, and Wyoming comprise the Northern Great Plains region of the USA. The soil and water...