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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 
chemostat
Earth science; Soil science
A device for the continuous culture of microorganisms in which growth rate and population size are regulated by the concentration of a limiting nutrient in incoming medium.
piston flow
Earth science; Soil science
A jump in effluent from background concentration to the input concentration at 1 pore volume of flow.
lysimeter
Earth science; Soil science
(i) A device for measuring percolation and leaching losses from soil under controlled conditions. (ii) A device for measuring gains (irrigation, precipitation, and condensation) ...
soil sample
Earth science; Soil science
A representative sample taken from an area, a field, or portion of a field from which the physical, biological, and chemical properties can be determined.
chemical activity
Earth science; Soil science
(i) A dimensionless measure of the deviation of the chemical potential of a substance from its value at a standard state. It is defined by the equation: µ = µ°+ RT ln a, ...
glauconite
Earth science; Soil science
A Fe-rich dioctahedral mica with tetrahedral Al (or Fe3+) usually greater than 0. 2 atoms per formula unit and octahedral R3+ correspondingly greater than 1. 2 atoms. A ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)