- 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 surface layer of mineral soil that has the same requirements as the mollic epipedon with respect to color, thickness, organic carbon content, consistence and base saturation, but that has >110 mg P kg-1 soluble in 0. 05 M citric acid, or is dry >300 days (cumulative) during the period when not irrigated. The anthropic epipedon forms under long continued cultivation and fertilization.
Industry:Earth science
Mollisols that have a xeric soil moisture regime. Xerolls may have a calcic, petrocalcic, or gypsic horizon, or a duripan.
Industry:Earth science
Natural microbial assemblages of two or more species in which each microorganism benefits from the other. The group may collectively carry out some process (i.e., xenobiotic degradation) that no single member can accomplish individually.
Industry:Earth science
An isolation volume of soil used to conduct one-dimentional flow and transport studies.
Industry:Earth science
Addition of nutrients to contaminated soil to stimulate indigenous microorganisms to carry out bioremediation.
Industry:Earth science
Soil covered by an alluvial, loessal, or other surface mantle of more recent depositional material, usually to a depth greater than 50 cm.
Industry:Earth science
Si12Mg8O30 (OH) 4 (OH2)•8H2) A fibrous clay mineral composed of two silica tetrahedral sheets and one magnesium octahedral sheet that make up the 2:1 layer. The 2:1 layers occur in strips with an average width of three linked tetrahedral chains joined at the edges to form tunnels where water molecules are held. .
Industry:Earth science
In soil classification one of the categories intermediate between the subgroup and the soil series. Families provide groupings of soils with ranges in texture, mineralogy, temperature, and thickness.
Industry:Earth science
An instrument used to measure the thermal conductivity of a material.
Industry:Earth science
Histosols that have an intermediate degree of plant fiber decomposition and a bulk density between about 0. 1 and 0. 2 g cm-3. Hemists are saturated with water for periods long enough to limit their use for most crops unless they are artificially drained.
Industry:Earth science
