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

Tropepts

Earth science; Soil science

Inceptisols that have a mean annual soil temperature of 8°C or more, and <5°C difference between mean summer and mean winter temperatures at a depth of 50 cm below the surface. Tropepts may have an ...

Ion activity

Earth science; Soil science

Single ion activity is calculated by multiplying the concentration by the activity coefficient, usually calculated using the extended Debye-Hückel equation or the Davies equation. Numerically, it ...

Fritted trace elements

Earth science; Soil science

Sintered silicates having total guaranteed analyses of micronutrients with controlled, relatively slow, release characteristics.

Glomalin

Earth science; Soil science

A sugar-protein complex secreted by certain fungi primarily in plant rhizosphere that is thought to contribute to soil aggregation.

Microfauna

Earth science; Soil science

Protozoa, nematodes, and arthropods of microscopic size.

Hydraulic gradient (soil water)

Earth science; Soil science

A vector (macroscopic) point function that is equal to the decrease in the hydraulic head per unit distance through the soil in the direction of the greatest rate of decrease. In isotropic soils, ...

Autochthonous

Earth science; Soil science

Microorganisms and/or substances indigenous to a given ecosystem; the true inhabitants of an ecosystem; referring to the common microbiota of the body of soil microorganisms that tend to remain ...