A pedon is the basic soil mapping unit, and a polypedon is the basic soil sampling unit.
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Q81: Generally speaking, a high cation exchange capacity
Q82: Since 1950, as much as 38 percent
Q83: Peds increase the porosity and permeability of
Q84: Irrigated land accounts for only about
Q87: A dark colored soil is usually rich
Q88: Soil is a dynamic natural body comprising
Q90: Pedology is concerned with the practical use
Q91: Histosols develop in cold, arid climates.
Q104: Entisols are the least developed soils in
Q113: Oxisols are not very fertile.
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