- 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 ...
A group of related soils that differ, one from the other, primarily because of differences in kinds and numbers of plants and soil organisms as a soil-forming factor.
Industry:Earth science
(i) A mass movement process characterized by a landslide involving a shearing and rotary movement of a generally independent mass of rock or earth along a curved slip surface (concave upward) and about an axis parallel to the slope from which it descends, and by backward tilting of the mass with respect to that slope so that the slump surface often exhibits a reversed slope facing uphill. (ii) The landform or mass of material slipped down during, or produced by a slump.
Industry:Earth science
(i) Protection of the soil against physical loss by erosion or against chemical deterioration; that is, excessive loss of fertility by either natural or artificial means. (ii) A combination of all management and land use methods that safeguard the soil against depletion or deterioration by natural or by human-induced factors. (iii) The branch of soil science that deals with soil conservation (i) and (ii).
Industry:Earth science
(i) Rating curve showing the relation between stage and rate of flow of a stream. (ii) Curve showing the relation of discharge of a pump and the speed, power, and head.
Industry:Earth science
(i) Texture group consisting of sandy clay, silty clay, and clay soil textures. (ii) Family particle-size class for soils with 35% or more clay and <35% rock fragments in upper subsoil horizons.
Industry:Earth science
A soil temperature regime that has mean annual soil temperatures of <0°C. Permafrost is present.
Industry:Earth science
A measure of the ability of an atom to attract an electron in competition with other atoms.
Industry:Earth science
(i) The physical constitution of a soil profile as exhibited by the kinds, thickness, and arrangement of the horizons in the profile, and by the texture, structure, consistence, and porosity of each horizon. (ii) The visible characteristics of the soil or any of its parts.
Industry:Earth science
A fertilizer term used interchangeably with delayed release, controlled release, controlled availability, slow acting, and metered release to designate a rate of dissolution (usually in water) much less than is obtained for completely water-soluble compounds. Slow release may involve either compounds that dissolve slowly or soluble compounds coated with substances relatively impermeable to water.
Industry:Earth science
