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

Intermittent stream

Earth science; Soil science

A stream, or reach of a stream, that does not flow year-round and that flows only when a) it receives baseflow solely during wet periods, or b) it receives ground-water discharge or protracted ...

Soil genesis

Earth science; Soil science

(i) The mode of origin of the soil with special reference to the processes or soil-forming factors responsible for development of the solum, or true soil, from unconsolidated parent material. (ii) ...

Free iron oxides

Earth science; Soil science

A general term for those iron oxides that can be reduced and dissolved by a dithionite treatment. Generally includes goethite, hematite, ferrihydrite, lepidocrocite, and maghemite, but not ...

Bedrock

Earth science; Soil science

A general term for the solid rock that underlies the soil and other unconsolidated material or that is exposed at the surface.

Concentrated flow

Earth science; Soil science

A relatively large water flow over or through a relatively narrow course.

Chemical activity

Earth science; Soil science

(i) A dimensionless measure of the deviation of the chemical potential of a substance from its value at a standard state. It is defined by the equation: µ = µ°+ RT ln a, where µ is the chemical ...

Glauconite

Earth science; Soil science

A Fe-rich dioctahedral mica with tetrahedral Al (or Fe3+) usually greater than 0. 2 atoms per formula unit and octahedral R3+ correspondingly greater than 1. 2 atoms. A generalised formula is K(R1. ...