- Industri: Earth science
- Number of terms: 26251
- Number of blossaries: 0
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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 ...
A saturated layer of soil which is separated from any underlying saturated layers by an unsaturated layer.
Industry:Earth science
A line in a two-dimensional flow field of equal hydraulic head.
Industry:Earth science
A reducing moisture regime in a soil that is virtually free of dissolved oxygen because it is saturated by ground water or by water of the capillary fringe.
Industry:Earth science
The ratio of the mass of a unit volume of dry soil to the mass of the same unit volume of water.
Industry:Earth science
A group of related soils that differ, one from another, primarily as a result of differences in climate as a soil-forming factor.
Industry:Earth science
A group of layer silicate minerals of the 2:1 type that has the interlayer filled with a positively charged metal-hydroxide octahedral sheet. There are both trioctahedral (e.g., M = Fe(II), Mg2+, Mn2+, Ni2+) and dioctahedral (M= Al3+, Fe3+, Cr3+) varieties.
Industry:Earth science
A boundary condition where a value for the variable of interest at each point in space and given a set of input values, a unique output can be determined.
Industry:Earth science
A regular geometric arrangement of points in a plane or in space. Lattice is used to represent the distribution of repeating atoms or groups of atoms in a crystalline substance. A lattice is a mathematical concept. Atomic substitutions take place in a structure and not in a lattice.
Industry:Earth science
A group of soils in the broadest category. For example, in the 1938 classification system. The three soil orders were zonal soil, intrazonal soil, and azonal soil. In the 1975 there were 10 orders, whereas in the current USDA classification scheme (Soil Survey Staff. 1994. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. SCS-USDA. U. S. Gov. Print. Office, Washington, DC) there are 11 orders, differentiated by the presence or absence of diagnostic horizons: Alfisols, Andisols, Aridisols, Entisols, Histosols, Inceptisols, Mollisols, Oxisols, Spodosols, Ultisols, Vertisols. Orders are divided into Suborders and the Suborders are farther divided into Great Groups.
Industry:Earth science
A group of contiguous similar pedons. The limits of a polypedon are reached at a place where there is no soil or where the pedons have characteristics that differ significantly.
Industry:Earth science
