- 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 ...
The pH value of a solution in equilibrium with a variable charge material or mixture of materials whose net charge from all sources is zero ( i.e. anion exchange capacity = effective cation exchange capacity). It is often determined for soils that are low in permanent charge minerals and high in oxides and hydrous oxides of Fe and Al.
Industry:Earth science
The process of determining the relationship between plant nutrient uptake or yield and the amount of nutrient extracted by a particular soil test method.
Industry:Earth science
The lowest category of U. S. system of soil taxonomy; a conceptualized class of soil bodies (polypedons) that have limits and ranges more restrictive than all higher taxa. Soil series are commonly used to name dominant or codominant polypedons represented on detailed soil maps. The soil series serve as a major vehicle to transfer soil information and research knowledge from one soil area to another.
Industry:Earth science
The concentration of an extractable nutrient above which a crop response to added nutrient would not be expected.
Industry:Earth science
The process by which air in the soil is replaced by air from the atmosphere. In a well-aerated soil, the soil air is very similar in composition to the atmosphere above the soil. Poorly aerated soils usually contain a much higher content of CO2 and a lower content of O2 than the atmosphere above the soil. The rate of aeration depends largely on the volume and continuity of air-filled pores within the soil.
Industry:Earth science
The natural tendency for biological organisms or specific cells or organs of an organism to respond to the stimulus of gravity.
Industry:Earth science
The sorting out, lifting, and removal of loose, dry, fine grained soil particles by the turbulent, eddy action of the wind.
Industry:Earth science
The depressing effect caused by one or more plant nutrients on the uptake and availability of another nutrient in the plant.
Industry:Earth science
The coagulation of colloidal soil particles due to the ions in solution. In most soils the clays and humic substances remain flocculated due to the presence of doubly and triply charged cations.
Industry:Earth science
