Zinc Content in Different Forms of Paddy Growing Soils in Selected Villages of Gangavati Taluka in North Karnataka

Abstract

Sixty surface (0-20 cm) soil samples were collected each from the paddy fields of villages in Gangavati taluka in North Karnataka during 2010. Distributions of different forms of zinc in paddy growing soils were studied. The results showed that more than 75% (79.38%) in Herura village and more than 90% (99.35%) in Maralanahalli village of total zinc occurred as residual zinc, whereas water soluble + exchangeable Zn accounted for only 0.11% in Maralanahalli village and 6.71% in Sanapura village soil samples. The water soluble + exchangeable zinc status varied from 0.13 to 1.93 ppm, organically bound zinc from 0.16 to 5.32 ppm, manganese oxide bound zinc from 1.00 to 5.89 ppm, amorphous sesquioxides bound zinc from 0.09 to 2.16 ppm, crystalline sesquioxides bound zinc form 1.21 to 9.94 ppm and residual zinc from 53.29 to 277.99 ppm. Among the Zn fractions water soluble + exchangeable zinc was low in all the soils when compared to other fractions, which is a very important for the plant nutrition. Amorphous sesquioxide bound form of zinc is the seat for zinc adsorption because of its high specific surface area. Crystalline sesquioxide bound form of zinc dominated when compared to water soluble + exchangeable, organically bound, manganese oxide bound and amorphous sesquioxide bound zinc fractions in selected village soils in Gangavati taluka.

DOI

https://doi.org/10.29321/MAJ.10.001330

Pages

444 - 448

Creative Commons

Copyright

© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

Keywords