- 업종: 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 ...
A fracture or fracture zone of the earth with displacement along one side in respect to the other.
Industry:Earth science
(i) Any mineral that occurs as a part of or in the soil. (ii) A natural inorganic compound with definite physical, chemical, and crystalline properties (within the limits of isomorphism), that occurs in the soil.
Industry:Earth science
Well-drained soils of an association which have developed under the dominant influence of the natural vegetation characteristic of a region. The zonal soils of an area.
Industry:Earth science
(i) Soils characteristic of tundra regions. (ii) A zonal great soil group consisting of soils with dark-brown peaty layers over grayish horizons mottled with rust and having continually frozen substrata; formed under frigid, humid climates, with poor drainage, and native vegetation of lichens, moss, flowering plants, and shrubs.
Industry:Earth science
A coarse-grained, acid igneous rock containing chiefly alkali feldspar and quartz and some mica and/or hornblende.
Industry:Earth science
(i) A law describing the rate of flow of water through saturated porous media. (Named for Henry Darcy of Paris, who formulated it in 1856 from extensive work on the flow of water through sand filter beds. ) As formulated by Darcy, the law is Q = KS(H + e)/e where Q is the volume of water passed in unit time, S is the area of the bed, e is the thickness of the bed, H is the depth of water on top of the bed, and "K is a coefficient dependent on the nature of the sand," and for cases "when the pressure under the filter is equal to the weight of the atmosphere. " (ii) Generalization for three dimensions: The rate of viscous flow of water in isotropic porous media is proportional to, and in the direction of, the hydraulic gradient. (iii) Generalization for other fluids: The rate of viscous flow of homogenous fluids through isotropic porous media is proportional to, and in the direction of, the driving force.
Industry:Earth science
A cutan that is light-colored in thin section because of the reduction and translocation of iron.
Industry:Earth science
A class of highly specific enzymes which make double stranded breaks in DNA at specific sites near where they combine.
Industry:Earth science
(i) A crop produced incidental to the main crop of the farm and usually occupying the land for a short period. (ii) A crop grown to replace a main crop that has failed.
Industry:Earth science
(i) Open conduit for conveying water across obstructions. (ii) An entire canal elevated above natural ground. An aqueduct. (iii) A specially calibrated structure for measuring open channel flows.
Industry:Earth science
