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

Fulvic acid

Earth science; Soil science

The pigmented organic material that remains in solution after removal of humic acid by acidification. It is separated from the fulvic acid fraction by adsorption on a hydrophobic resin at low pH ...

Salt-replaceable acidity

Earth science; Soil science

The aluminium and hydrogen that can be replaced from an acid soil by an unbuffered salt solution such as KCl or NaCl.

Total acidity

Earth science; Soil science

The total acidity including residual and exchangeable acidity. Often it is calculated by subtraction of exchangeable bases from the cation exchange capacity determined by ammonium exchange at pH 7. ...

Discretization

Earth science; Soil science

The dividing of the flow domain into nodes or elements.

Penetration resistance

Earth science; Soil science

The force per unit area on a standard ASAE cone necessary for penetration by the cone.

Ground data

Earth science; Soil science

Supporting data collected on the ground, and information derived there from, as an aid to the interpretation of remotely recorded surveys, such as airborne imagery, etc. Generally, this should be ...

Superphosphoric acid

Earth science; Soil science

The acid form of polyphosphates, consisting of a mixture of orthophosphoric and polyphosphoric acids. Species distribution varies with concentration, which is typically 30 to 36% P (68 to 83% P2O5).