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