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Soil Chemistry

For 330 Soil Chemistry

TermDefinition
Acidic cations Acid-forming cations that predominate cation exchange sites in acidic soils; includes hydrogen cation H+ and the aluminum cation Al+++.
Anions Negatively charged ion.
Base saturation Percentage of the total exchangeable cation pool that is accounted for by base cations.
Buffering capacity Capacity of the soil to release cations and replace ions lost through uptake or leaching.
Cation exchange capacity Capacity of a soil to hold exchangeable cations on negatively charged sites at the surface of soil minerals and organic matter.
Cations Positively charged ion.
Compaction The process where soil porosity is decreased as a result of being squeezed together by the weight of overlying sediment or by mechanical means.
Lyotropic series Common soil cations listed in order of strength with which they bond to cation exchange sites; bonding strength depends on Ionic charge and atomic size.
Oxidation Loss of electrons by an electron donor in oxidation-reduction reactions.
Redox potential The capacity to accept electrons and to be reduced.
Reduction The gain of electrons by an electron acceptor in oxidation-reduction reactions.
Soil acidification Buildup of hydrogen cations in soil decreasing the pH.
Aerobic Occurring in the presence of oxygen.
Anerobic Occurring in the absence of oxygen.
Created by: mdcoleman
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