4 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
Effective porosity
Earth science; Soil science
That portion of the total porosity available for fluid flow.
Throughflow
Earth science; Soil science
Water that infiltrates and moves laterally through the upper soil horizons and emerges downslope as seepage before entering a stream.
Backslope
Earth science; Soil science
The hillslope position that forms the steepest, and generally linear, middle portion of the slope. In profile, backslopes are bounded by a convex shoulder above and a concave footslope below.
Law of diminishing returns
Earth science; Soil science
When other factors in production do not change, successive increases in the input of one factor will not proportionately increase product yield.
Rhizosphere
Earth science; Soil science
The zone of soil immediately adjacent to plant roots in which the kinds, numbers, or activities of microorganisms differ from that of the bulk soil.
Sulfidic material
Earth science; Soil science
Waterlogged material or organic material that contains 7. 5 g kg-1or more of sulfide-sulfur.
Impedance
Earth science; Soil science
The total opposition of a material (e.g., soil, copper wire) to items (e.g., roots, coleoptiles, water, electrons) moving through it.
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