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Earth science
Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.
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Earth science > Soil science 
mineral
Earth science; Soil science
A naturally occurring homogeneous solid, inorganically formed, with a definite chemical composition and an ordered atomic arrangement.
adenylate energy charge ratio (EC)
Earth science; Soil science
A measure of the metabolic and growth state of microorganisms and microbial communities. The energy charge ratio is calculated using the formula: EC = (ATP + 1/2ADP)/(ATP + ...
exchangeable cation
Earth science; Soil science
A positively charged ion held on or near the surface of a solid particle by a negative surface and which may be replaced by other positively charged ions in the soil solution. ...
aggregate stability
Earth science; Soil science
A measure of the proportion of the aggregates in a soil which do not easily slake, crumble, or disintegrate.
nodule
Earth science; Soil science
(i) A cemented concentration of a chemical compound, such as calcium carbonate or iron oxide, that can be removed from the soil intact and that has no orderly internal ...
stone line
Earth science; Soil science
A sheet-like lag concentration of coarse fragments in surficial sediments. In cross section, the line may be marked only by scattered fragments or it may be a discrete layer of ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)