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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 
claypan
Earth science; Soil science
A dense, compact, slowly permeable layer in the subsoil having a much higher clay content than the overlying material, from which it is separated by a sharply defined boundary. ...
ring silicate
Earth science; Soil science
A mineral containing a circular arrangement of silica tetrahedra which share two oxygens per tetrahedra; silicon-oxygen ration is SiO,32-; example: beryl, Be3Al2(SiO3)6; ...
flagstone
Earth science; Soil science
A relatively thin, flat rock fragment, from 150 to 380 mm on the long axis.
boundary conditions
Earth science; Soil science
A prescribed condition imposed upon the boundary of the flow domain.
neutralism
Earth science; Soil science
A lack of interaction between two organisms in the same ecosystem.
poorly drained
Earth science; Soil science
A drainage class referring to soils which have evidence (e.g., mottles) of seasonal water tables at depths between 0 and 8 inches.
placic horizon
Earth science; Soil science
A black to dark reddish mineral soil horizon that is usually thin but that may range from 1 mm to 25 mm in thickness. The placic horizon is commonly cemented with iron and is ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)