soil-forming process

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• Soil horizon — Soil samples illustrating horizons (subsoil on right) A soil horizon is a specific layer in the land area that is parallel to the soil surface and possesses physical characteristics which differ from the layers above and beneath …   Wikipedia

• Soil science — is the study of soil as a natural resource on the surface of the earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils; and these properties in relation to the use and… …   Wikipedia

• Soil — For other uses, see Soil (disambiguation). A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; the bottommost layer represents bedrock …   Wikipedia

• soil — soil1 soilless, adj. /soyl/, n. 1. the portion of the earth s surface consisting of disintegrated rock and humus. 2. a particular kind of earth: sandy soil. 3. the ground as producing vegetation or as cultivated for its crops: fertile soil. 4. a… …   Universalium

• Soil conservation — is set of management strategies for prevention of soil being eroded from the earth’s surface or becoming chemically altered by overuse, salinization, acidification, or other chemical soil contamination. The principal approaches these strategies… …   Wikipedia

• Soil pH — is the pH of soil water. It is based on the measurement of pH, which depends on the activity of hydrogen ions (H+) in a solution.There are many different methods to collect soil water, all which influence the measured soil pH in one way or… …   Wikipedia

• Subaqueous soil — Subaqueous Soils are soils that form in sediment found in shallow permanently flooded environments. Excluded from the definition of these soils are any areas “permanently covered by water too deep (typically greater than 2.5 m) for the growth of… …   Wikipedia

• Canadian system of soil classification — The Canadian system of soil classification is more closely related to the American system than any other. They differ in several ways. The Canadian system is designed to cover only Canadian soils. The Canadian system dispenses with a sub order… …   Wikipedia

• Lunar soil — Moondust redirects here. For the Commodore 64 video game, see Moondust (video game). For the Psychoactive drug, see Phencyclidine. Bootprint on lunar soil …   Wikipedia

• National Cooperative Soil Survey — From a Report of Bureau of Soils, U.S. Department of Agriculture, 1923. The National Cooperative Soil Survey (NCSS) in the United States is a nation wide partnership of federal, regional, state, and local agencies and institutions. This… …   Wikipedia

• Colony-forming unit — For the human hematopoietic cell, see Hematopoietic stem cell. In microbiology, colony forming unit (CFU or cfu) is a measure of viable bacterial or fungal numbers. Unlike direct microscopic counts where all cells, dead and living, are counted,… …   Wikipedia