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

Consistency

Earth science; Soil science

The manifestations of the forces of cohesion and adhesion acting within the soil at various water contents, as expressed by the relative ease with which a soil can be deformed or ruptured. ...

Mass wasting

Earth science; Soil science

The downslope movement of soil, rock, and regolith, under the influence of gravity. Slow mass wasting processes are also termed soil creep and solifluction and rapid mass wasting is also termed ...

Silica-sesquioxide ratio

Earth science; Soil science

The molecules of silicon dioxide (SiO2) per molecule of aluminium oxide (Al2O3) plus ferric oxide (Fe2O3) in clay minerals or in soils.

Relative yield

Earth science; Soil science

The harvestable or biomass yield with or without supplementation of the nutrient in question expressed as a percentage of the yield with the nutrient in adequate amounts.

Soil extract

Earth science; Soil science

The solution separated from a soil suspension or from a soil by filtration, centrifugation, suction, or pressure. (May or may not be heated prior to separation. )

Ion-dipole bond

Earth science; Soil science

The bond resulting from the orientation and attachment of a dipolar molecule to the surface of an ion.

Flocculation

Earth science; Soil science

The coagulation of colloidal soil particles due to the ions in solution. In most soils the clays and humic substances remain flocculated due to the presence of doubly and triply charged cations.