- 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 ...
Mollisols that are saturated with water for periods long enough to limit their use for most crops other than pasture unless they are artificially drained. Aquolls may have a histic epipedon, a sodium saturation in the upper part of the mollic epipedon of >15% that decreases with depth or mottles or gray colors within or immediately below the mollic epipedon.
Industry:Earth science
Organic soil material in which the original plant parts are not recognizable. Contains more mineral matter and is usually darker in color than peat.
Industry:Earth science
Any cell unit capable of developing into a complete organism. For fungi, the unit may be a single spore, a cluster of spores, hyphae, or a hyphal fragment.
Industry:Earth science
Enzymes (exclusive of live cells) that are (i) excreted by live cells during growth and division; (ii) attached to cell debris and dead cells; (iii) leaked into soil solution from extant or lyzed cells but whose original functional location was on or within the cell. Synonymous with exoenzymes.
Industry:Earth science
Capable of rebounding to an original shape when deformed under moderate pressure.
Industry:Earth science
Oxidation of ammonium to nitrate through the combined action of two chemoautotrophic bacteria, one forming nitrite from ammonium and the other oxidizing nitrite to nitrate.
Industry:Earth science
A volume defined by the abiotic factors (i.e. climate, soil, physiography) that influence vegetation growth and development.
Industry:Earth science
Fe3O4 A black, magnetic iron oxide mineral usually inherited from igneous rocks. Often found in soils as black magnetic sand grains.
Industry:Earth science
Mineral soils that have 30% or more clay, deep wide cracks when dry, and either gilgai microrelief, intersecting slickensides, or wedge-shaped structural aggregates tilted at an angle from the horizon. (An order in the U. S. system of soil taxonomy. )
Industry:Earth science
