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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.

Contributors in Soil science

Soil science

orthophosphate

Earth science; Soil science

A salt of orthophosphoric acid such as (NH4)2HPO4, CaHPO4, or K2HPO4.

soil horizon

Earth science; Soil science

A layer of soil or soil material approximately parallel to the land surface and differing from adjacent genetically related layers in physical, chemical, and biological properties or characteristics ...

parts per million (PPM)

Earth science; Soil science

(i) The concentration of solutions expressed in weight or mass units of solute (dissolved substance) per million weight or mass units of solution. (ii) A concentration in solids expressed in weight ...

batch culture

Earth science; Soil science

A method for culturing organisms in which the organism and supporting nutritive medium are added to a closed system. Contrast with chemostat.

anorthite

Earth science; Soil science

A plagioclase feldspar containing calcium (90-100%) and sodium (0-10%).

microbiological culture

Earth science; Soil science

A population of microorganisms cultivated in an artificial growth media. A pure culture is grown from a single cell; a mixed culture consists of two or more microorganisms growing together.

phytometer

Earth science; Soil science

A plant or plants used to measure the physical factors of the habitat in terms of physiological activities.

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