A Comparative Study of the Efficacy of the Different Extractants for Zinc and Manganese in Relation to Plant Availability

Abstract

One hundred and fifty ans different soil samples belonging to 8 groupe of rice soile viz. Coastal sandy alluvium, lateritic alluvium, Kayal, Kari, Karapadom, Kois, Pokkall and Poonthalpadam were Studied for their extractable zinc and manganese contenta using different extractants such as 0.1 M HC1 (nr shaking and 10 soll extractant ratio) 0.05 N. Hc1+0.025 NHSO (1 hr shaking and 1.10 soil extractant ratio) 0.02 N. EDTA (1 hr shaking and 1:10 soil extractant ratio) 1 N Ammo. acetate buffered at pH 4.8 (1 hr shaking and 1:10 soil extractant ratio) and 0.005 M. DTPA (1:2 soil: extractant ratio and 2 hrs shaking) Hundred seeds of rice (Var. Jaya) was grown for a period of 17 days by a modified Neubauer technique in all the soils to determine the actual plant available zinc and manganese in these soils. Correlations were made between extractable zinc and manganese and actual plant available zinc and manganess to decide the most suitable extractant for each group of soil as well as for the soils of Kerala in general The results indicate that DTPA is the most versatile extractent for all types of soils of the State, The resulte further show that a determination of the total status of the elementa is quite inadequate in the prediction of plant avaliability.

DOI

https://doi.org/10.29321/MAJ.10.003271

Pages

546 - 553

Creative Commons

Copyright

© The Author(s), 2026. 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