9 5.0 REFERENCES
<br />Chapman, S.S., Griffith, G.E., Omernik, J.M., Price, A.B., Freeouf, J., Schrupp, D.L., 2006.
<br />Ecoregions of Colorado (color poster with map, descriptive text, summary tables, and
<br />photographs): Reston, VA: U.S. Geological Survey (map scale 1:1:200,000).
<br />Hahn, T. 2009. NRCS Senior Regional Soil Scientist, Lakewood, Colorado. E-mail
<br />communication with Kari Sever on July 28, 2009.
<br />Natural Resources Conservation Service (NRCS). 2001. File information for Rio Blanco
<br />County soils. Information includes: "Highly Erodible Soil Map Unit List (HEL)", dated
<br />1/1/90; "Comprehensive Hydric Soils List", dated 5/21/93; and "Important Farmlands of Rio
<br />Blanco County", dated 1979. Verified 7/2009.
<br />Paschke, M.W. 2009. Associate Professor of Restoration Ecology - Colorado State
<br />University. Personal communication with Kari Sever on July 23, 2009.
<br />Sanders, B. 2009. NRCS Rangeland Management Specialist, Rio Blanco County, Meeker,
<br />Colorado. Personal communication with Kari Sever on July 21, 2009.
<br />Schoeneberger, P.J., D.A. Wysocki, E.C. Benham, and W.D. Broderson (editors). 2002.
<br />Field book for describing and sampling soils, Version 2.0. Natural Recources Conservation
<br />Service, National Soil Survey Center, Lincoln NE.
<br />Soil Survey Staff. 2009a. Official Soil Series Descriptions (OSD). Natural Resources
<br />Conservation Service, USDA. Available online at http://soils.usda.gov/
<br />technical/classification/osd/index.html, accessed July 1, 2009.
<br />Soil Survey Staff. 2009b. Web Soil Survey. Natural Resource Conservation Service, USDA.
<br />Available online at http://websoilsurvey nres.usda.gov/, accessed July 1, 2009.
<br />Soil Survey Staff. 2009c. Soil Data Mart. Natural Resource Conservation Service, USDA.
<br />Available online at http://websoilsurvey.nres.usda.gov/, accessed July 1, 2009.
<br />Soil Survey Staff. 1999. Soil Taxonomy. Second Edition. Agricultural Handbook No. 436.
<br />U.S.D.A. Natural Resources Conservation Service.
<br />Soil Survey Staff. 1998. Keys to soil taxonomy. Eighth Edition. U.S. Government Printing
<br />Office: Washington, D.C.
<br />Soil Survey Staff. 1993. Soil Survey Manual. Soil Conservation Service. United States
<br />Department of Agriculture Handbook No. 18.
<br />Tripp, W.P, L.W. Williams, D.K. Alstatt, J.J. Rawinski, and C.F. Spears. 1982. Revised
<br />• 1992. Soil survey of Rio Blanco County area, Colorado. U.S. Department of Agriculture -
<br />Soil Conservation Service and U.S. Department of Interior - Bureau of Land Management in
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