- 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 ...
Any material that does not contain rhizobia able to nodulate leguminous plants of interest. The material need not be void of all rhizobia.
Industry:Earth science
Measurement of changes in physical or chemical properties of materials as a function of temperature, usually heating or cooling at a uniform rate. (i) Differential thermal analysis (DTA), measures temperature difference (ΔT) between a sample and reference material. (ii) Differential scanning calorimetry (DSC), measures the differential heat flow between a sample and reference material. (iii) Thermogravimetric analysis (TGA), measures weight loss or gain.
Industry:Earth science
Condition in an aquatic ecosystem where excessive nutrient concentrations result in high biological productivity, typically associated with algae blooms, that cause sufficient oxygen depletion to be detrimental to other organisms.
Industry:Earth science
Entisols that have either textures of very fine sand or finer in the fine earth fraction, or textures of loamy fine sand or coarser and a coarse fragment content of 35% or more and that have an organic carbon content that decreases regularly with depth. Orthents are not saturated with water for periods long enough to limit their use for most crops.
Industry:Earth science
Any of various shallow, often oval or elliptical, generally marshy, closed depressions in the Atlantic coastal plain (from southern New Jersey to northeastern Florida, especially developed in the Carolinas). They range from about 100 meters to many kilometers in length, are rich in organic matter, and under native conditions contain trees and shrubs different from those of the surrounding areas.
Industry:Earth science
Mixing of different kinds of silicate layers along the c-direction in a given stack. Interstratification may be regular or random. In regular interstratification, the stacking of the component layers follows a periodic succession. In random interstratification, the distribution of the different layers lacks periodicity and is controlled only by the proportions of the various layers.
Industry:Earth science
An altered form of bacterial cells. Refers particularly to the swollen, irregular vacuolated cells of Rhizobium and Bradyrhizobium in legume nodules.
Industry:Earth science
Aridisols that are not in cryic temperature regimes and do not have the following diagnostic subsurface horizons or features: argillic, salic, duripan, gypsic, petrogypsic, calcic, petrocalcic.
Industry:Earth science
An organic substance produced by one organism that in low concentrations will kill or inhibit growth of other organisms.
Industry:Earth science
An end or lateral moraine, built during a temporary but significant halt in the retreat of a glacier. Also, a moraine built during a minor readvance of the ice front during a period of recession.
Industry:Earth science
