- 行业: Earth science
- Number of terms: 26251
- Number of blossaries: 0
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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 ...
Classes based on the relative proportion of stones at or near the soil surface. Used as a phase distinction in mapping soils.
Industry:Earth science
In sedimentation analysis of particle size, the diameter assigned to a nonspherical particle; that is, the diameter of a spherical particle of the same density and velocity of fall. Sometimes referred to as the equivalent spherical diameter.
Industry:Earth science
Oxisols that are moist all or most of the time and that have a high organic carbon content within the upper 1 m. Humox have a mean annual soil temperature of <22°C and a base saturation within the oxic horizon of <35%, measured at pH 7.
Industry:Earth science
Any layer lying beneath the soil solum, either conforming or unconforming.
Industry:Earth science
Biological oxidation of ammonium to nitrite and nitrate, or a biologically induced increase in the oxidation state of nitrogen.
Industry:Earth science
Dislodgement and downslope transport of soil and rock material as a unit under direct gravitational stress. The process includes slow displacements such as creep and solifluction, and rapid movements such as landslides, rock slides, and falls, earthflows, debris flows, and avalanches. Agents of fluid transport (water, ice, air) may play an important, if subordinate role in the process.
Industry:Earth science
A term for the mid section of the infrared region of the electromagnetic spectrum with wavelengths from around 2 or 3 μm (varying with the author), to around 25 μm. This is the region commonly referred to when discussing the infrared spectra of chemical compounds, organic or inorganic, and minerals.
Industry:Earth science
A type of fractal, usually associated with multplicative cascades, that is characterized by a spectrum of generalized or R<é>nyii dimensions instead of a single fractal dimenion. Used to scale soil spatial and temporal variablility.
Industry:Earth science
Simple mathematical relationships derived from ovservations for describing more complex processes.
Industry:Earth science
