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Open Chemistry

formerly Central European Journal of Chemistry

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Volume 13, Issue 1


Volume 13 (2015)

Comparison of the variable potassium fertilization on light and heavy soils

Grzegorz Kulczycki
  • Corresponding author
  • Department of Plant Nutrition, Wroclaw University of Environmental and Life Sciences 50-375 Wroclaw, Poland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Przemyslaw Grocholski
  • Department of Plant Nutrition, Wroclaw University of Environmental and Life Sciences 50-375 Wroclaw, Poland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Piotr Stepien
  • Department of Plant Nutrition, Wroclaw University of Environmental and Life Sciences 50-375 Wroclaw, Poland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Adam Michalski
  • Institute of Geodesy and Geoinformatics, Wroclaw University of Environmental and Life Sciences 50-375 Wroclaw, Poland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2015-09-10 | DOI: https://doi.org/10.1515/chem-2015-0130


The present study aims to characterize the effect of the annual potassium variable rates fertilization (VRF) on the content of the soluble K, with this being investigated in both light and heavy soils. The study was performed between 2007 and 2013 in two separate areas differing in the soil texture classes. The initial levels of potassium determined in both experimental areas were classified as very high. The data obtained confirmed the positive effect of the variable fertilization techniques on the equalization of the K contents in the experimental fields, as determined by the decrease in the variance, standard deviation, and range of the elements content in both types of the soils studied. As assumed, the controlled withholding of fertilization applied in the early stages of the experiment resulted in a decrease of K content toward the preferred, medium to optimal, levels. In addition, we found that the progressive initiation of the potassium VRF on the experimental areas, to prevent an excessive decreases, resulted in earlier global adjustment of K contents in the light soils in contrast to the heavy ones, with the final spatial equalization being better in the latter, however.

Keywords : Variable rate fertilization (VRF); potassium; spatial variation; light soils; heavy soils


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About the article

Received: 2015-04-10

Accepted: 2015-07-17

Published Online: 2015-09-10

Citation Information: Open Chemistry, Volume 13, Issue 1, ISSN (Online) 2391-5420, DOI: https://doi.org/10.1515/chem-2015-0130.

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© 2015 Grzegorz Kulczycki et al.. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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