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

Tourmaline

Earth science; Soil science

A ring-or cyclo-silicate mineral which contains boron.

Compaction

Earth science; Soil science

(i) To unite firmly; the act or process of becoming compact. (ii) (geology) The changing of loose sediment into hard, firm rock. (iii) (soil engineering) The process by which the soil grains are ...

Available nutrients

Earth science; Soil science

(i) The amount of soil nutrient in chemical forms accessible to plant roots or compounds likely to be convertible to such forms during the growing season. and (ii) The contents of legally designated ...

Half-bog soil

Earth science; Soil science

A great soil group, of the intrazonal order and hydromorphic suborder consisting of soil with dark-brown or black peaty material over greyish and rust mottled mineral soil; formed under conditions of ...

Varve

Earth science; Soil science

A sedimentary layer, lamina, or sequence of laminae, deposited in a body of still water within 1 year; specifically, a thin pair of graded glaciolacustrine layers seasonally deposited, usually by ...

Petrogypsic horizon

Earth science; Soil science

A continuous, strongly cemented, massive, gypsic horizon that is cemented by calcium sulfate. It can be chipped with a spade when dry. Dry fragments do not slake in water and it is impenetrable to ...

Alluvial fan

Earth science; Soil science

A generic term for constructional landforms that are built of stratified alluvium with or without debris-flow deposits and that occur on the pediment slope, downslope from their source of alluvium.