- 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 bacteria that fix dinitrogen (N2) within organized structures (nodules) on the roots, stems, or leaves of plants. Sometimes used as a synonym for "rhizobia".
Industry:Earth science
Total carbon assimilation by plants. GPP = NPP + respiration losses.
Industry:Earth science
The ratio of the radiant energy reflected by a body to that incident upon it. The suffix (-ance) implies a property of that particular specimen surface.
Industry:Earth science
The ratio of the quantity of exchangeable bases to the cation exchange capacity. The value of the base saturation varies according to whether the cation exchange capacity includes only the salt extractable acidity or the total acidity determined at pH 7 or 8. Often expressed as a percent.
Industry:Earth science
Spodosols that have less than six times as much free iron (elemental) than organic carbon in the spodic horizon but the ratio of iron to carbon is 0. 2 or more. Orthods are not saturated with water for periods long enough to limit their use for most crops.
Industry:Earth science
The ratio of the amount of solar radiation reflected by a body to the amount incident upon it, often expressed as a percentage, as, the albedo of the earth is 34%.
Industry:Earth science
The yield that a producer expects to achieve, based on overall management imposed and past production records.
Industry:Earth science
The scientific study of soils and their weathering profiles. (added 6/1/2000).
Industry:Earth science
Thc quantity of harvestable biomass per unit total biomass produced. If used in relation to nutrients it would be the quantity of biomass produced per unit input of plant nutrient.
Industry:Earth science
The movement of water in soil in which the pores are not filled to capacity with water.
Industry:Earth science
