- 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 manifestations of the forces of cohesion and adhesion acting within the soil at various water contents, as expressed by the relative ease with which a soil can be deformed or ruptured. Engineering descriptions include: (i) the designation of five inplace categories (soft, firm or medium, stiff, very stiff, and hard) as assessed by thumb and thumbnail penetrability and indentability; and (ii) characterization by the Atterberg limits (i.e., liquid limit, plastic limit, and plasticity number).
Industry:Earth science
The solution separated from a soil suspension or from a soil by filtration, centrifugation, suction, or pressure. (May or may not be heated prior to separation. )
Industry:Earth science
The downslope movement of soil, rock, and regolith, under the influence of gravity. Slow mass wasting processes are also termed soil creep and solifluction and rapid mass wasting is also termed slumping, slides, and debris- or mud-floes see bank failure).
Industry:Earth science
The harvestable or biomass yield with or without supplementation of the nutrient in question expressed as a percentage of the yield with the nutrient in adequate amounts.
Industry:Earth science
The sequence of biochemical changes undergone by nitrogen wherein it is used by a living organism, transformed upon the death and decomposition of the organism, and converted ultimately to its original oxidation state.
Industry:Earth science
The metabolic potential of soil microbial communities based on the number of substrates used that differentiate the microbial community.
Industry:Earth science
Soils in which pathogens do not establish or persist, pathogens establish but cause little or no damage, or pathogens cause disease for a while, but the disease becomes less important even though the pathogens persist in soil.
Industry:Earth science
Vertisols that have a thermic, mesic, or frigid soil temperature regime and if not irrigated, cracks that remain both 5 cm or more wide through a thickness of 25 cm or more within 50 cm of the mineral soil surface for 60 or more consecutive days during 90 days following the summer solstice and closed 60 or more consecutive days during the 90 days following the winter solstice.
Industry:Earth science
The amount of soluble salts in a soil. The conventional measure of soil salinity is the electrical conductivity of a saturation extract.
Industry:Earth science
