Acta Agronomica Hungarica
Volume/Issue:
Volume 57: Issue 1
Retention of pendimethalin by humic acids from different farm wastes and by soils in various management systems
Authors: Archana 1 and F. Prasad 1
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  • 1 St. John’s College Department of Chemistry Agra India
DOI:
https://doi.org/10.1556/AAgr.57.2009.1.2
Page Count:
15–20
Publication Date:
01 Mar 2009
Online Publication Date:
09 Jun 2009
Article Category:
Research Article
Restricted access

The retention of pendimethalin by humic acids (HAs) from different farm wastes and from soils in various management systems was studied at 20 and 40°C. The magnitude of pendimethalin retained varied from 19.50–71.00 and 20.50–80.00 μM g −1 at 20°C on HAs from farm wastes and soils, respectively, which decreased with a rise in temperature. Pendimethalin retention followed the order: Soil HAs > Farm waste HAs. The highly significant values of R 2 suggested the excellent fitness of the Freundlich (0.965**–0.996**) and Langmuir (0.943**–0.986**) isotherms for pendimethalin retention. The values of the ‘k’ and ‘n’ retention parameters of the Freundlich isotherm and the ‘K’ and ‘b’ parameters of the Langmuir equation confirmed the relatively higher capacity of soil HAs to retain pendimethalin.

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Cover Acta Agronomica Hungarica
Acta Agronomica Hungarica
Print ISSN:
0238-0161
Online ISSN:
1588-2527
Keywords:
farm waste and soil humic acids; pendimethalin retention

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