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Abstract

 

This article in SSSAJ

  1. Vol. 34 No. 2, p. 195-197
     
    Received: July 22, 1969
    Accepted: Dec 2, 1969


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doi:10.2136/sssaj1970.03615995003400020008x

Comparisons of Measured and Theoretical Mn2+ Concentrations in Soil Suspensions1

  1. H. L. Bohn2

Abstract

Abstract

The Mn2+ concentrations in control and autoclaved suspensions of nine acid and alkaline soils in 0.01M CaCl2 differed widely from the Mn2+ concentrations calculated from models which either require measurement of Eh or assume Eh to be fixed by another redox couple. An alternative model is proposed which expresses the equilibrium solubility of the manganese compounds in terms of pH — ½pMn. The values of pH — ½pMn measured in the suspensions of all the soils tested correspond to the solubility of MnO2.

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