- Industria: 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 ...
Microorganisms and/or substances indigenous to a given ecosystem; the true inhabitants of an ecosystem; referring to the common microbiota of the body of soil microorganisms that tend to remain constant despite fluctuations in the quantity of fermentable organic matter.
Industry:Earth science
In ecological theory, that group of organisms in soil that rapidly proliferate in response to an abundance of resources. Analogous to zymogenous microorganisms.
Industry:Earth science
Production of a substance by one organism that inhibits one or more other organisms. The terms antibiosis and allelopathy have also been used to describe such cases of chemical inhibition.
Industry:Earth science
Resulting from, or produced by, soil-forming processes; for example, a genetic soil profile or a genetic horizon.
Industry:Earth science
Residue of salts (including gypsum and all more soluble species) precipitated by evaporation.
Industry:Earth science
Previous to 1994 this term was used to indicate Inceptisols that have formed either in vitric pyroclastic materials, or have low bulk density and large amounts of amorphous materials, or both. The term was dropped as a suborder in the 1994 revision of the USDA, Keys to soil taxonomy.
Industry:Earth science
One of the categories in the system of soil classification that has been used in the USA for many years. Great groups place soils according to soil moisture and temperature, base saturation status, and expression of horizons.
Industry:Earth science
Number of enzyme activity units per mass of protein. Often expressed as micromoles of product formed per unit time per milligram of protein. Also used in radiochemistry to express the radioactivity per mass of material (radioactive + nonradioactive).
Industry:Earth science
Low level of bases in soil material, specified at family level of classification.
Industry:Earth science
