- 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 ...
(i) A step-like surface, bordering a stream or shoreline, that represents the former position of a flood plain, lake, or sea shore. (ii) A raised, generally horizontal strip of earth and/or rock constructed along a hill on or nearly on a contour to make land suitable for tillage and to prevent accelerated erosion. (iii) An earth embankment constructed across a slope for conducting water from above at a regulated flow to prevent accelerated erosion and to conserve water.
Industry:Earth science
A term applied to differences, correlation, etc. , to indicate that they are probably not due to chance alone; usually indicates a probability of not less than 95 percent.
Industry:Earth science
A general term for a mass movement landform and a process characterized by moderately rapid to rapid (greater than 30 cm per year) downslope transport, by means of gravitational stresses, of a mass of rock and regolith that may or may not be water saturated.
Industry:Earth science
A stone or pebble that has been shaped, worn, faceted, or polished by the abrasive action of windblown sand, usually under arid conditions. When the pebble is at the ground surface, as in a desert pavement, the upper part is polished while the lower or below ground part is angular or subangular.
Industry:Earth science
A liming material composed mainly of calcium and magnesium hydroxides that reacts quickly to neutralize acid soils.
Industry:Earth science
A soil temperature regime that has mean annual soil temperatures of >0°C but <8°C, >5°C difference between mean summer and mean winter soil temperatures at 50 cm, and cold summer temperatures.
Industry:Earth science
A mineral soil horizon that has a texture of loamy very fine sand or finer, has soil structure rather than rock structure, contains some weatherable minerals, and is characterized by the alteration or removal of mineral material as indicated by mottling or gray colors, stronger chromas or redder hues than in underlying horizons, or the removal of carbonates. The cambic horizon lacks cementation or induration and has too few evidences of illuviation to meet the requirements of the argillic or spodic horizon.
Industry:Earth science
A soil that is correlated as a recognized, existing soil series for the purpose of expediency. They are so like the soils of the defined series in morphology, composition, and behavior that little or nothing is gained by adding a new series.
Industry:Earth science
(i) The process whereby a compound is transformed into simpler compounds. (ii) The changing of a soil to a more highly leached and a more highly weathered condition; usually accompanied by morphological changes such as development of an A2 horizon.
Industry:Earth science
A group term for oxides of manganese. They are typically black and frequently occur in soils as nodules and coatings on ped faces usually in association with iron oxides. Birnessite and lithiophorite are common manganese oxide minerals in soils.
Industry:Earth science
