Soil science

Soil science

That science dealing with soils as a natural resource on the surface of the earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils per se; and these properties in relation to the use and management of soils.

Industry: Earth science

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Soil science

Beryl

Earth science; Soil science

A berllium aluminium silicate mineral containing Si6O18-12 rings.

Heat

Earth science; Soil science

A form of energy resident in the random motion of molecules.

Placic horizon

Earth science; Soil science

A black to dark reddish mineral soil horizon that is usually thin but that may range from 1 mm to 25 mm in thickness. The placic horizon is commonly cemented with iron and is slowly permeable or ...

Pure culture

Earth science; Soil science

A population of microorganisms composed of a single strain. Such cultures are obtained through selective laboratory procedures and are rarely found in a natural environment.

Moderately well drained

Earth science; Soil science

A drainage class referring to soils which have evidence (e.g., mottles) of seasonal water tables at depths between 18 and 36 inches.

Illuvial horizon

Earth science; Soil science

A soil layer or horizon in which material carried from an overlying layer has been precipitated from solution or deposited from suspension. The layer of accumulation.

Heavy soil

Earth science; Soil science

A soil with a high content of the fine separates, particularly clay, or one with a high drawbar pull and hence difficult to cultivate, especially when wet.