- 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 potential that is generated between an oxidation or reduction half-reaction and the standard hydrogen electrode (0. 0v at pH = 0). In soils it is the potential created by oxidation-reduction reactions that take place on the surface of a platinum electrode measured against a reference electrode minus the EH of the reference electrode . This is a measure of the oxidation-reduction potential of electrode reactive components in the soil.
Industry:Earth science
Water that seeps toward stream channels after infiltration into the ground.
Industry:Earth science
The gelatinous material at the surface of roots grown in nonsterile soil. It includes natural and modified plant exudates (more specifically mucilages), bacterial cells, and their metabolic products (e.g., capsules and slimes) as well as colloidal mineral and organic matter from the soil.
Industry:Earth science
The presence of nutrients and energy within a stage, represented by a group of organisms, of the food chain, ranging from primary nutrient assimilating autotrophs to the predatory organotrophs.
Industry:Earth science
The volume, including the solids and the pores, of an arbitrary soil mass. The bulk volume is determined before drying to constant weight at 105°C.
Industry:Earth science
The ratio of the hydrodynamic dispersion coefficient (d) divided by the pore water velocity (v); thus D= d/v.
Industry:Earth science
The energy required to separate the ions of a crystal to an infinite distance.
Industry:Earth science
The mutual and undisturbed relationship between adjacent sedimentary strata that have been deposited in orderly sequence with little or no evidence of time lapses; true stratigraphic continuity in the sequence of beds without evidence that the lower beds were folded, tilted, or eroded before the higher beds were deposited.
Industry:Earth science
The growing or feeding form of a microbial cell, as opposed to a resistant resting form.
Industry:Earth science
The combination of all tillage operations, cropping practices, fertilizer, lime, and other treatments conducted on or applied to the soil for the production of plants.
Industry:Earth science
