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Changes in P forms and availability as influenced by management practices

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Summary

The objective of this study was to evaluate the changes in soil phosphorus (P) forms and potential availability that occurred in a grassland soil when it was cultivated and cropped to winter wheat (Triticum aestivum L.) in a crop-fallow rotation using three tillage systems: no-till, stubble mulch, and plow (bare fallow). The experiment was located in western Nebraska on a Duroc loam (fine silty, mixed, mesic Pachic Haplustolls). After 14 years, significant differences had developed in the form of soil P as determined by a sequential fractionation procedures between the original control (grass-sod) and the bare fallow treatments. Most of the differences were associated with increases in sand content caused by erosion, accompanied on the bare fallow plots by a mixing of sand from lower horizons throughout the surface 0–15 cm.

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Authors and Affiliations

  1. Department of Soil Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada

    I. P. O’halloran, J. W. B. Stewart & E. De Jong

Authors
  1. I. P. O’halloran
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  2. J. W. B. Stewart
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  3. E. De Jong
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Additional information

Contribution R502 from the Saskatchewan Institute of Pedology, University of Saskatchewan, Saskatoon, SK, Canada S7N 0W0.

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O’halloran, I.P., Stewart, J.W.B. & De Jong, E. Changes in P forms and availability as influenced by management practices. Plant Soil 100, 113–126 (1987). https://doi.org/10.1007/BF02370935

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