GG282 Lecture Notes - Lecture 13: Soil Horizon, Calcium Carbonate, Podzol

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Materials can be added and removed from the soil. Materials may be moved in the soil profile. General term applied to the removal and downward movement of materials from a horizon (symbol e is used to denote it) General term applied when materials accumulate in a soil horizon. Downward percolation of water can carry fine grained material in suspension. Lessivage is the detachment and movement of clay from the a to b horizon. Downward movement of soluble mineral compounds that are dissolved in soil moisture (from percolating rainwater) Occurs where there is only a small amount of leaching. Calcium carbonate is moved from the a to the b or c horizon. Can producce c horizons rich in salt or calcium carbonate (e. g. cca) leached from the a and b horizon. In a cool humid regions with coniferous trees, the surface is covered in a layer of litter and humus.

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