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

Acetylene-reduction assay

Earth science; Soil science

A technique for demonstrating or estimating nitrogenase activity by measuring the rate of acetylene (C2H2) reduction to ethylene (C2H4).

Solifluction

Earth science; Soil science

Slow, viscous downslope flow of water-saturated regolith. Rates of flow vary widely. The presence of frozen substrate or even freezing and thawing is not implied in the original definition. ...

Ground moraine

Earth science; Soil science

An extensive layer of till, having an uneven or undulating surface; a deposit of rock and mineral debris dragged along, in, on, or beneath a glacier and emplaced by processes including basal ...

Pedological features

Earth science; Soil science

Recognisable units within a soil material which are distinguishable from the enclosing material for any reason such as origin (deposition as an entity), differences in concentration of some fraction ...

Numerical methods model

Earth science; Soil science

Algorithms that use simplified arithmetic and logical operations to derive approximate solutions to complex formulas, such as differential equations, describing a soil process.

Top dressing

Earth science; Soil science

An application of fertiliser to a soil surface, without incorporation, after the crop is established.

Matric potential

Earth science; Soil science

Potential envergy of soil water due to the attractive forces (adhesion and cohesion) between water and the soil matrix. Matric potential is expressed as energy per unit volume and equals the product ...