SOIL BASICS I MACROSCALE FEATURES - Introduction to Soil Chemistry - page 22

Bigham JM, Ciolkosz EJ (eds.). Soil Color . Madison, WI: Soil Science Society of
America, 1993.
Douglas LA, Thompson ML (eds.). Soil Micromorphology and Soil Classification.
Madison, WI: Soil Science Society of America, 1985.
Soil Survey Staff. Soil Taxonomy: A Basic System of Soil Classification for Making and
Interpreting Soil Surveys. Washington, DC: U.S. Government Printing Office. 1975.

REFERENCES

1. State soils pictures http://soils.usda.gov/gallery/state_soils/ .
2. State

soils description

http://ortho.ftw.nrcs.usda.gov/cgi-bin/osd/

osdname.cgi? .
3. Bigham JM, Ciolkosz EJ (eds.). Soil Color. Madison, WI: Soil Science Society of
America, 1993.