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

Lapilli

Earth science; Soil science

Non or slightly vesicular pyroclastics, 2. 0 to 76 mm in at least one dimension, with an apparent specific gravity of 2. 0 or more.

Spodosols

Earth science; Soil science

Mineral soils that have a spodic horizon or a placic horizon that overlies a fragipan. (An order in the U. S. system of soil taxonomy. )

Channer

Earth science; Soil science

In Scotland and Ireland, gravel; in the USA, thin, flat rock fragments up to 150 mm on the long axis.

Montmorillonite

Earth science; Soil science

Si4Al1. 5Mg0. 5O10(OH)2Ca0. 25 An aluminium silicate (smectite) with a 2:1 layer structure composed of two silica tetrahedral sheets and a shared aluminium and magnesium octahedral sheet. ...

Denitrification

Earth science; Soil science

Reduction of nitrogen oxides (usually nitrate and nitrite) to molecular nitrogen or nitrogen oxides with a lower oxidation state of nitrogen by bacterial activity (denitrification) or by chemical ...

Pump testing

Earth science; Soil science

A test made on a well by pumping it down for a period of time and observing the change in hydraulic head to determine the hydraulic properties of the surrounding media. Also called a draw down test ...