Tidball, R.R., Severson, R.C. (1976). Chemistry of northern Great Plains soils. In Geochemical Survey of the Western Energy Regions, Third Annual Progress Report, July 1976. United States Geological Survey, Open File Report 76-729, p. 57-81.
Some or all of the raw data associated with this publication have been loaded into the "Canadian Database of Geochemical Surveys" and subsequently converted into easy-to-use MS Excel spreadsheets. Follow the links in the "Survey Coverage" section below to determine exactly what data are available.
Soil sampling survey, North Dakota, South Dakota, Montana, Wyoming and southern Saskatchewan, 1974. (more)
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