- 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 ...
(Al,Li)MnO2(OH)2 A black manganese oxide that is common in iron-manganese nodules of acid soils. It has a layer structure.
Industry:Earth science
A naturally occurring homogeneous solid, inorganically formed, with a definite chemical composition and an ordered atomic arrangement.
Industry:Earth science
A measure of the metabolic and growth state of microorganisms and microbial communities. The energy charge ratio is calculated using the formula: EC = (ATP + 1/2ADP)/(ATP + ADP + AMP). The denominator represents the total adenylate pool; the numerator, the portion charged with high energy phosphate bonds.
Industry:Earth science
A soil moisture regime that is neither dry for as long as 90 cumulative days nor for as long as 60 consecutive days in the 90 days following the summer solstice at periods when the soil temperature at 50 cm below the surface is above 5°C.
Industry:Earth science
A sealed cylinder with weighted bulb and graduated stem used to measure the density of soil suspensions.
Industry:Earth science
A hollow or depression of the land surface, which is generally saucer or trough-shaped, formed by wind erosion especially in an area of shifting sand, loose soil, or where vegetation is disturbed or destroyed.
Industry:Earth science
(i) (wells) A manufactured well casing with precisely dimensioned and shaped openings. (Compare with perforated casing. ) (ii) (canals) A device used to clean surface water of debris, such as revolving screens or turbulent fountain screens.
Industry:Earth science
A continuous, strongly cemented, massive, gypsic horizon that is cemented by calcium sulfate. It can be chipped with a spade when dry. Dry fragments do not slake in water and it is impenetrable to roots.
Industry:Earth science
A method based on the theory of regionalized variables for predicting without bias and minimum variance the spatial distribution of earth components, including soil properties.
Industry:Earth science
A generic term for constructional landforms that are built of stratified alluvium with or without debris-flow deposits and that occur on the pediment slope, downslope from their source of alluvium.
Industry:Earth science
