Soil beidellite and its relation to problems of potassium fertility and poor response to potassium fertilizers |
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Authors: | M I Bajwa |
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Institution: | 1. The International Rice Research Institute, Los Ba?os, Laguna, Philippines
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Abstract: | Summary X-ray diffraction studies were made on soils with and without potassium fertility problems. All soils with clay fractions
containing dominant beidellite or vermiculite showed potassium deficiency and lack of response to potassium fertilizer applications.
All of the soils containing dominant montmorillonite or other clay minerals contained adequate potassium; on none of these,
poor potassium response was reported. Special management practices are needed on the beidellitic and vermiculitic soils to
increase potassium and ammonium fertilizer efficiency. Dominance of beidellite in the clay fraction should be reflected in
soil classification. Establishment of a ‘beidellite’ family differentiating criterion in the Soil Taxonomy is proposed for
this purpose. |
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Keywords: | Beidellite Fixation Potassium |
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