- 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 ...
Adsorption of ions that occurs with the elimination of water of hydration in the space between the adsorbed ion and the surface. The force of retention of ions involves both ionic and covalent bonding. Strong adsorption of anions and cations at variable charge sites in organic matter, oxides, and phyllosilicate edges involves inner sphere adsorption.
Industry:Earth science
Single ion activity is calculated by multiplying the concentration by the activity coefficient, usually calculated using the extended Debye-Hückel equation or the Davies equation. Numerically, it approaches the value of the ionic concentration at infinite dilution.
Industry:Earth science
A sugar-protein complex secreted by certain fungi primarily in plant rhizosphere that is thought to contribute to soil aggregation.
Industry:Earth science
Inceptisols that have a mean annual soil temperature of 8°C or more, and <5°C difference between mean summer and mean winter temperatures at a depth of 50 cm below the surface. Tropepts may have an ochric epipedon and a cambic horizon, or an umbric epipedon, or a mollic epipedon under certain conditions but no plaggen epipedon, and are not saturated with water for periods long enough to limit their use for most crops.
Industry:Earth science
Sintered silicates having total guaranteed analyses of micronutrients with controlled, relatively slow, release characteristics.
Industry:Earth science
Rock waste, banks, and dump depositions resulting from the excavation of ditches and strip mines.
Industry:Earth science
