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Journal of Agronomy

Year: 2007 | Volume: 6 | Issue: 1 | Page No.: 175-178
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Authors

R.M. Jayabalakrishnan

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Research Article

Effect of Vermiculite as an Ameliorant for Paper Mill Effluent Irrigated Soil and on the Productivity of Sunflower

R.M. Jayabalakrishnan
The treatment which received vermiculite at the rate of 5 t ha-1 +50% Gypsum (T5) registered the highest yield of sunflower grain and stalk which was nearly 1.68 and 1.41 folds increase, respectively over the control. The grain and stalk yield of sunflower from the treatment receiving vermiculite alone at the rate of 10 t ha-1 (T4) registered just 1.08 and 1.03% increase over the control. The increase in yield by the application of vermiculite +50% GR might be due to mitigation of the ill effects of Na in this treatment combination by the replacement of Na ion from the soil exchange complex along with the application of vermiculite which could have enhanced the CEC and physical environment of the soil resulting in possible increase in the productivity of the crop. The combined use of vermiculite along with pressmud/gypsum as amendments enhanced the nutrient status apart from providing with better physical and biological environment resulting in significant impact on various plant productivity parameters.
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