- 업종: 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 science dealing with the fundamental properties and processes of water in the vadose zone.
Industry:Earth science
With a mean annual soil temperature of <8 °C that are never dry for 60 consecutive days or more within the 90 days following the summer solstice. Borolls do not contain material that has a CaCO3 equivalent >400 g kg-1 unless they have a calcic horizon, and they are not saturated with water for periods long enough to limit their use for most crops.
Industry:Earth science
The relative purity, strength, or saturation of a color; directly related to the dominance of the determining wavelength of the light and inversely related to grayness; one of the three variables of color.
Industry:Earth science
The force per unit area on a standard ASAE cone necessary for penetration by the cone.
Industry:Earth science
Unique microbial community that develops around a mycorrhiza.
Industry:Earth science
The total acidity including residual and exchangeable acidity. Often it is calculated by subtraction of exchangeable bases from the cation exchange capacity determined by ammonium exchange at pH 7. 0. It can be determined directly using pH buffer-salt mixtures (e.g. BaCl2 plus triethanolamine, pH 8. 0 or 8. 2) and titrating the basicity neutralized after reaction with a soil.
Industry:Earth science
The acid form of polyphosphates, consisting of a mixture of orthophosphoric and polyphosphoric acids. Species distribution varies with concentration, which is typically 30 to 36% P (68 to 83% P2O5).
Industry:Earth science
Supporting data collected on the ground, and information derived there from, as an aid to the interpretation of remotely recorded surveys, such as airborne imagery, etc. Generally, this should be performed concurrently with the airborne surveys. Data as to weather, soils, and vegetation types and conditions are typical.
Industry:Earth science
The portion of the cation or anion exchange capacity which varies with pH.
Industry:Earth science
