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Soil Chem and Water

For 330 Soil chemistry and Soil water, From Chapin et al 2011

TermDefinition
Anion Negatively charged ion.
Cation exchange capacity Capacity of a soil to hold exchangeable cations on negatively charged sites at the surface of soil minerals and organic matter.
Oxidation Loss of electrons by an electron donor in oxidation-reduction reactions.
Base saturation Percentage of the total exchangeable cation pool that is accounted for by base cations.
Redox potential The capacity to accept electrons and to be reduced.
Cation Positively charged ion.
Reduction The gain of electrons by an electron acceptor in oxidation-reduction reactions.
Field capacity Water held by a soil after gravitational water has drained.
Water holding capacity Difference in soil water content between field capacity and permanent wilting point.
Water potential Potential energy of water relative to pure water at the soil surface.
Unsaturated flow Water movement through soils with a water content less than field capacity.
Water-saturated All soil pores filled with water.
Permanent wilting point Water held by a soil that cannot be extracted by plant uptake.
Created by: mdcoleman