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BookmarkSoil is material capable of supporting plant life.
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Soil forms through a variety of soil formation processes, and includes weathered rock "parent material" combined with dead and living organic matter and air.Soils can be divided into two general layers: topsoil, the topmost layer, where most plant roots, microorganisms, and other animal life are located, and subsoil, which is deeper and often more dense and contains less organic matter..
For more information about the topic Soil, read the full article at Wikipedia.org, or see the following related articles:
Humus — Humus is a complex organic substance resulting from the breakdown of plant material in a process called humification. This process can occur ... > read more
Infiltration (hydrology) — Infiltration is the process by which water on the ground surface enters the soil. Infiltration is governed by two forces, gravity, and capillary ... > read more
Soil pH — Soil pH is an indication of the alkalinity or acidity of soil. It is based on the measurement of pH, which is based in turn on the activity of ... > read more
Soil science — Soil science deals with soil as a natural resource on the surface of the earth including soil formation, classification and mapping; physical, ... > read moreNote: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Soil at Wikipedia.org. See the Wikipedia copyright page for more details.
