19 Terms
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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
Wetting front
Earth science; Soil science
The boundary between the wetted region and the dry region of soil during infiltration.
Conformity
Earth science; Soil science
The mutual and undisturbed relationship between adjacent sedimentary strata that have been deposited in orderly sequence with little or no evidence of time lapses; true stratigraphic continuity in ...
Mucigel
Earth science; Soil science
The gelatinous material at the surface of roots grown in nonsterile soil. It includes natural and modified plant exudates (more specifically mucilages), bacterial cells, and their metabolic products ...
Trophic level
Earth science; Soil science
The presence of nutrients and energy within a stage, represented by a group of organisms, of the food chain, ranging from primary nutrient assimilating autotrophs to the predatory organotrophs.
Bulk volume
Earth science; Soil science
The volume, including the solids and the pores, of an arbitrary soil mass. The bulk volume is determined before drying to constant weight at 105°C.
Dispersivity
Earth science; Soil science
The ratio of the hydrodynamic dispersion coefficient (d) divided by the pore water velocity (v); thus D= d/v.
Underground seepage
Earth science; Soil science
Water that seeps toward stream channels after infiltration into the ground.
