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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 
food chain
Earth science; Soil science
Movement of soil nutrients from one life form to another as a result of the different feeding habits and dietary requirements of the organisms in the soil ecosystem.
urban land
Earth science; Soil science
Areas so altered or obstructed by urban works or structures that identification of soils is not feasible.
aquolls
Earth science; Soil science
Mollisols that are saturated with water for periods long enough to limit their use for most crops other than pasture unless they are artificially drained. Aquolls may have a ...
muck
Earth science; Soil science
Organic soil material in which the original plant parts are not recognizable. Contains more mineral matter and is usually darker in color than peat.
rhizobia populated
Earth science; Soil science
Any material that contains rhizobia able to nodulate leguminous plants of interest. Contrast with rhizobia free.
soil organic residue
Earth science; Soil science
Animal and vegetative materials added to the soil of recognizable origin.
non-expanding
Earth science; Soil science
Layer silicate type which has no intracrystalline swelling capacity in the presence of water.
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)