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Extraction of nitrogen from soils

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Summary

A roller bed and rotary end-over-end shaker were compared for the extraction of mineral N from a variety of soil types; both were equally efficient with an optimum extraction time of 30 min. However, the roller bed permitted a greater operational capacity, a faster throughput of samples, and easier identification of sample bottles compared with the end-over-end shaker. More NH4 +-N and NO3 −-N (P<0.001) was recovered from soil by 2 M KCl than by any other extractant, in a soil: extractant ratio of 1 to 5 (w:v), except water, which was equally efficient at removing NO3 −-N from soils.

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Authors and Affiliations

  1. Scottish Crop Research Institute, DD2 5DA, Invergowric, Dundee, UK

    R. E. Wheatley, R. MacDonald & Angela M. Smith

Authors
  1. R. E. Wheatley
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  2. R. MacDonald
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  3. Angela M. Smith
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Wheatley, R.E., MacDonald, R. & Smith, A.M. Extraction of nitrogen from soils. Biol Fert Soils 8, 189–190 (1989). https://doi.org/10.1007/BF00257765

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  • DOI: https://doi.org/10.1007/BF00257765

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