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

Gypsids

Earth science; Soil science

Aridisols which have a gypsic or petrogypsic horizon that has its upper boundary within 100 cm of the soil surface and lack a petrocalcic horizon overlying any of these horizons.

Psychrophilic organism

Earth science; Soil science

An organism whose optimum temperature for growth falls in the approximate range of 5 to 15°C. Synonymous with cryophile.

Hydrogen bond

Earth science; Soil science

An intramolecular chemical bond between a hydrogen atom of one molecule and a highly electronegative atom (e.g. O, N) of another molecule.

Delineation

Earth science; Soil science

An individual polygon shown by a closed boundary on a soil map that defines the area, shape, and location of a map unit within a landscape.

Quorum sensing

Earth science; Soil science

Bacterial gene expression regulated by small molecular weight compounds (i.e., N-acy-homoserine lactones) that are synthesised only when the appropriate density ('quorum') of bacterial producers is ...

Ammonia volatilization

Earth science; Soil science

Mass transfer of nitrogen as ammonia gas from soil, plant, or liquid systems to the atmosphere.

Phosphoric acid

Earth science; Soil science

In commercial fertiliser manufacturing, it is used to designate orthophosphoric acid, H3PO4. In fertiliser labeling, it is the common term used to represent the phosphate concentration in terms of ...