- 行业: Earth science
- Number of terms: 26251
- Number of blossaries: 0
- Company Profile:
An international scientific society that fosters the transfer of knowledge and practices to sustain global soils. Based in Madison, WI, and founded in 1936, SSSA is the professional home for 6,000+ members dedicated to advancing the field of soil science. It provides information about soils in ...
The angle that a structural surface, e.g. a bedding or fault plane, makes with the horizontal, measured perpendicular to the strike of the structure and in the vertical plane.
Industry:Earth science
The suitability of land for use without permanent damage. Land capability, as ordinarily used in the USA, is an expression of the effect of physical land conditions, including climate, on the total suitability for use, without damage, for crops that require regular tillage, for grazing, for woodland, and for wildlife. Land capability involves consideration of the risks of land damage from erosion and other causes and the difficulties in land use owing to physical land characteristics, including climate.
Industry:Earth science
The use of straw to create a surface mulch on all or part of the soil surface for soil or water conservation, for soil temperature management or for weed suppression.
Industry:Earth science
Soils with a mull horizon but having no horizon of accumulation of clay or sesquioxides.
Industry:Earth science
Transformation of a substrate by a microorganism without deriving energy, carbon, or nutrients from the substrate. The microorganism can transform the substrate into intermediate degradation products but fails to multiply.
Industry:Earth science
Variable charge surfaces are called constant potential surfaces because at constant activity of the potential determining ion (e.g. constant pH) the electrical potential difference between the solid surface and the bulk solution is constant.
Industry:Earth science
The hillslope position that forms the inner, gently inclined surface at the base of a slope. In profile, footslopes are commonly concave and are situated between the backslope and a toeslope.
Industry:Earth science
The negative logarithm of the apparent electron activity which can be calculated by including the apparent activity of electrons in equilibrium calculations of redox half-cell reactions. In practice it is used as an alternative to EH and at 25°C can be calculated from EH values expressed in volts by dividing by 0. 059.
Industry:Earth science
Term describing a cation surrounded by six equidistant anions.
Industry:Earth science
The velocity at which water travels in pores relative to a given axis. It is equal to the flux density divided by the soil water content.
Industry:Earth science
