Origin of Native Potassium in Alonso Soil
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Lugo, H. M., Colom, J., & Pietri, R. (1970). Origin of Native Potassium in Alonso Soil. The Journal of Agriculture of the University of Puerto Rico, 54(1), 70–75. https://doi.org/10.46429/jaupr.v54i1.11113

Abstract

Kaolin and illite were identified in the clay fraction of Alonso soil. The relative concentration of kaolin to illite in the 2.0-0.2 µ fraction was greater than double throughout the profile, while in the less than 0.2 µ fraction, it was about the same for profile depths down to 3 feet. Illite seems to predominate over kaolin at lower profile depths. The total potassium content of the clay fraction less than 0.2 µ corresponded with the observed trend in illite variation. Illite was found to be the only soil mineral source of native potassium in Alonso soil.
https://doi.org/10.46429/jaupr.v54i1.11113
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