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Unformatted text preview: different proportions. - Usually higher carbon dioxide and lower oxygen than atmosphere above the soil.- Soil gas composition is critical to biological processes. SOILS CONSIST OF THREE MAJOR COMPONENTS Terminology Pedon Smallest unit of a soil, about 1 m hexagon, 2+ m deep. Profile Vertical exposure of soil showing horizons. Horizon Nearly horizontal layer in soil formed by pedogenic processes....
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This note was uploaded on 06/21/2011 for the course NRES 201 taught by Professor Olson,k during the Spring '08 term at University of Illinois, Urbana Champaign.
- Spring '08