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Changes in soil organic matter with cropping as measured by organic carbon fractions and 13C natural isotope abundance

Plant and Soil volume 155, pages 399–402 (1993)Cite this article

Abstract

The decline in soil organic matter with cropping is a major factor affecting the sustainability of cropping systems. Changes in total C levels are relativelyinsensitive as a sustainability measure. Oxidation with different strength KMnO4 has been shown to be a more sensitive indicator of change. The relative size of soil C fractions oxidised by 333 mM KMnO4 declined with cropping, whilst the relative size of the unoxidised fraction increased. Changes in δ13C ratio have been used to measure C turnover in systems which include C3 and C4 species.

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Authors and Affiliations

  1. Department of Agronomy and Soil Science, University of New England, 2351, Armidale, N.S.W.

    Rod D. B. Lefroy & Graeme J. Blair

  2. Queensland Wheat Research Institute, P.O. Box 2282, 4350, Toowoomba, Qld.

    Wayne M. Strong

Authors
  1. Rod D. B. Lefroy
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  2. Graeme J. Blair
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  3. Wayne M. Strong
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Lefroy, R.D.B., Blair, G.J. & Strong, W.M. Changes in soil organic matter with cropping as measured by organic carbon fractions and 13C natural isotope abundance. Plant Soil 155, 399–402 (1993). https://doi.org/10.1007/BF00025067

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  • DOI: https://doi.org/10.1007/BF00025067

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