Earth science

Earth science

Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.

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Earth science > Soil science

metamorphic rock

Earth science; Soil science

Rock derived from preexisting rocks that have been altered physically, chemically, and/or mineralogically as a result of natural geological processes, principally heat and ...

seepage erosion

Earth science; Soil science

Erosion process typically involved in gully formation and bank failure in which subsurface flow exiting the soil transports soil particles entrained in the seepage water.

udox

Earth science; Soil science

Oxisols that have a udic soil moisture regime.

acetylene-block assay

Earth science; Soil science

A technique for demonstrating or estimating denitrification by measuring nitrous oxide (N2O) released from acetylene-treated soil. Acetylene inhibits nitrous oxide reduction to ...

gypsids

Earth science; Soil science

Aridisols which have a gypsic or petrogypsic horizon that has its upper boundary within 100 cm of the soil surface and lack a petrocalcic horizon overlying any of these horizons.

organic soil materials

Earth science; Soil science

Soil materials that are saturated with water and have 174 g kg-1 or more organic carbon if the mineral fraction has 500 g kg-1 or more clay, or 116 g kg-1 organic carbon if the ...