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Improved correlation between soil exchangeable K and plant K contents on a tissue water basis

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Abstract

The correlation between the exchangeable K of 184 loess topsoils and K in field grown winter wheat at stem elongation was higher for the tissue water K (r2=0.602) than for the classical K in dry matter (r2=0.278). The tissue water K versus soil K function levelled out at an upper plateau of 207 mmol kg−1. Tissue water K is shown to be a useful indicator to derive critical values of soil K whereas the classical dry matter K is considered to be an inadequate plant K indicator under practical agricultural conditions.

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Authors and Affiliations

  1. Institute of Soil Science, University of Hannover, Herrenhäuser Str. 2, D-30419, Hannover, Germany

    G. Springob & H. Graf von Reichenbach

  2. Institute of Soil Science and Plant Nutrition, University of Kiel, Olshausenstr. 40-60, D-24118, Kiel, Germany

    M. Lebert

Authors
  1. G. Springob
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  2. M. Lebert
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  3. H. Graf von Reichenbach
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Springob, G., Lebert, M. & von Reichenbach, H.G. Improved correlation between soil exchangeable K and plant K contents on a tissue water basis. Plant Soil 172, 163–165 (1995). https://doi.org/10.1007/BF00020870

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  • DOI: https://doi.org/10.1007/BF00020870

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