Nebraska Soils Field Trip - Virginia Tech
Nebraska Soils Field Trip - Virginia Tech
Nebraska Soils Field Trip - Virginia Tech
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4th IUSS Soil Classification Conference <strong>Field</strong> Tour Guidebook<br />
Classifications and Comparison of Diagnostics between Soil Taxonomy and World Reference Base (WRB) 1.)<br />
Taxonomic Classifications of Onawa pedon (95P0326)<br />
Soil Taxonomy<br />
Clayey over loamy, smectitic over mixed, superactive, calcareous, mesic Aquertic Udifluvents<br />
WRB Gleyic Fluvisols (Calcaric, Humic, Endosiltic) 3.)<br />
1.)<br />
Soil Survey Staff. 2010. Keys to Soil Taxonomy, 11th ed. USDA-Natural Resources Conservation Service, Washington, DC.<br />
IUSS Working Group WRB. 2007. World Reference Base for Soil Resources 2006, first update 2007. World Soil Resources Reports No.103. FAO, Rome.<br />
2.) Fails mollic epipedon (ST) and mollic horizon (WRB) criteria either due to thickness (1994 pedon) or a structureless state (massive) and very hard rupture resistance when dry.<br />
If a mollic is recognized, the ST subgroup changes to Aquertic Hapludolls (and minus calcareous class) and the prefix qualifiers change to Mollic Gleyic for Fluvisols reference soil group in WRB.<br />
3.)<br />
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service.<br />
U.S. Department of Agriculture Handbook 436<br />
The Vertic qualifier should be added to the prefix qualifiers list for the Fluvisols reference soil group (e.g., Gleyic Vertic Fluvisols).<br />
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