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

Rhizobia free

Earth science; Soil science

Any material that does not contain rhizobia able to nodulate leguminous plants of interest. The material need not be void of all rhizobia.

Alluvium

Earth science; Soil science

Sediments deposited by running water of streams and rivers. It may occur on terraces well above present streams, on the present flood plains or deltas, or as a fan at the base of a slope.

Turbulent flow

Earth science; Soil science

Movement of water molecules at sufficiently high energy levels that they do not slide over one another in parallel paths but cause eddie currents such that the mean velocity is not proportional to ...

Hemists

Earth science; Soil science

Histosols that have an intermediate degree of plant fibre decomposition and a bulk density between about 0. 1 and 0. 2 g cm-3. Hemists are saturated with water for periods long enough to limit their ...

Hemic material

Earth science; Soil science

Organic soil material at an intermediate degree of decomposition that contains 1/6 to 3/4 recognisable fibres (after rubbing) of undecomposed plant remains. Bulk density is usually very low, and ...

Point bar

Earth science; Soil science

One of a series of low, arcuate ridges of sand and gravel developed on the inside of a growing meander by the slow addition of individual accretions accompanying migration of the channel toward the ...

Soil family

Earth science; Soil science

In soil classification one of the categories intermediate between the subgroup and the soil series. Families provide groupings of soils with ranges in texture, mineralogy, temperature, and ...