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A Study of Late Pleistocene Loess Deposits, South Canterbury, New Zealand Part I. Forms and Amounts of Phosphorus Compared with other Techniques for Identifying Paleosols1,2

  • E.C.A. Runge, T.W. Walker and D.T. Howarth

Abstract

Four paleosols, and soil horizons within paleosols, were clearly identified in the thick calcium carbonate-free loess sections at Timaru, South Island, New Zealand, by changes in the distribution of total phosphorus and calcium phosphate in the upper 2 m to each paleosol. Extractable manganese was also sensitive in identifying paleosols, particularly the upper horizons. The distribution of bulk density values was useful in identifying paleosols; however, the maximum bulk density (>1.7 g/cc) occurred in horizons identified as B2 rather than fragipan horizons in three of four cases. The distribution of clay particles was useful in understanding the genesis of the modern soil and paleosols, but not in identifying paleosols.

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1

Part II will appear in Vol. 4, No. 2, June 1974.

2

Contribution from the Department of Soil Science, Lincoln College, University of Canterbury, New Zealand, and the Department of Agronomy, University of Illinois, Urbana. Supported in part by a Senior Postdoctoral Fellowship to the senior author while on sabbatic leave from the University of Illinois, and by a Research Grant from the University Grants Committee, New Zealand.

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References

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A Study of Late Pleistocene Loess Deposits, South Canterbury, New Zealand Part I. Forms and Amounts of Phosphorus Compared with other Techniques for Identifying Paleosols1,2

  • E.C.A. Runge, T.W. Walker and D.T. Howarth

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