soil
Definition
Life-supporting upper surface of earth that is the basis of all agriculture. It contains minerals and gravel from the chemical and physical weathering of rocks, decaying organic matter (humus), microorganism, insects, nutrients, water, and air. Soils differ according to the climate, geological structure, and rainfall of the area and are constantly being formed and removed by natural, animal, and human activity. Study of soils is called pedology.
soil is in the Environment & Pollution Control subject.
soil appears in the definitions of the following terms:
cathodic protection,
wetting,
wetting agent,
alkaline,
refuse reclamation,
bulk density,
acid rain,
environmental intervention,
detergency,
surfactant
and
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