4 Terms
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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
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.
