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This article in SSSAJ

  1. Vol. 24 No. 4, p. 300-305
    Received: Nov 9, 1959
    Accepted: Mar 18, 1960

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Oxidation-Reduction Studies on the Mechanism of B Horizon Formation in Podzols1

  1. L. J. McKenzie,
  2. E. P. Whiteside and
  3. A. E. Erickson2



Oxidation-reduction potentials in situ have been measured in a hydro-sequence of soils in the Podzol region of Michigan with variations in time and space. The soils were well-drained Kalkaska sand, imperfectly drained Saugatuck sand and poorly drained Roscommon sand. The distribution of citrate-oxidizing organisms and iron-oxidizing organisms in horizons of Kalkaska and Saugatuck sands was also studied.

Redox potentials were observed to vary with moisture, temperature and soil horizons. The population of citrate-oxidizing organisms decreased with depth and iron-oxidizing organisms were isolated from the Bir horizons of both Kalkaska and Saugatuck sands.

The results indicate that certain mechanisms of Podzol formation may be active in the soils studied.

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