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    SOIL CHARACTERISTICS

A. LEARNING OUTCOMES

By the end of this unit you should be able to:

B. SOIL


C. COMPOSITION

  • Inorganic material

  • Organic material

  • Water

  • Air

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D. COLOR

Picture (346x354, 152.7Kb) Picture (346x356, 144.5Kb)
Image credit for both soil photos: U.S. Department of Agriculture, NRCS, Distribution Maps of Dominant Soil Orders http://soils.usda.gov/technical/classification/orders/

Picture (550x347, 30.2Kb) E. TEXTURE


F. STRUCTURE Picture (34x28, 1.2Kb)

Designates shape, size & organization of peds

platy: horizontal, flat, plate-like peds
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prismatic & columnar: long, vertical peds bounded by flat to slightly rounded vertical faces
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blocky: squarish block-like peds
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granular: small rounded peds
Picture (450x339, 145.7Kb)

Image credit for all four structure photos: U.S. Department of Agriculture, NRCS Soil Survey Manual, Chapter 3 part 7 http://soils.usda.gov/technical/manual/contents/chapter3g.html


G. SOIL WATER Picture (54x25, 1.4Kb)

Infiltration

  • infiltration rate

  • infiltration capacity

Forms of soil water

  • gravity water

  • capillary water

    • field capacity

    • wilting point

    • available water capacity Picture (54x25, 1.4Kb)

  • hygroscopic water

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H. ORGANIC MATTER Picture (54x25, 1.4Kb)


Picture (500x342, 25.1Kb) I. CHEMISTRY

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J. SUMMARY


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©Karen A. Lemke: klemke@uwsp.edu
Last revised October 24, 2013