NUTRIENT RELEASE PATTERN UNDER LONG TERM PERMANENT FERTILIZER APPLICATION SYSTEM IN RICE

B.R. VISHNU¹*, VIJAYARAGHAVA KUMAR², BRIGIT JOSEPH³, B. RANI⁴, JACOB JOHN⁵, MEERA MOHAN^6
1College of Agriculture, Vellayani, Kerala Agricultural University, Thrissur, 680656, Kerala, India
²College of Agriculture, Vellayani, Kerala Agricultural University, Thrissur, 680656, Kerala, India
³College of Agriculture, Vellayani, Kerala Agricultural University, Thrissur, 680656, Kerala, India
⁴College of Agriculture, Vellayani, Kerala Agricultural University, Thrissur, 680656, Kerala, India
⁵Integrated Farming System Research Station, Karamana, Kerala Agricultural University, Thrissur, 680656, Kerala, India
⁶College of Agriculture, Vellayani, Kerala Agricultural University, Thrissur, 680656, Kerala, India
* Corresponding Author : agristatistician@gmail.com

Received : 20-05-2018     Accepted : 27-05-2018     Published : 30-05-2018
Volume : 10     Issue : 10       Pages : 6147 - 6149
Int J Agr Sci 10.10 (2018):6147-6149

Keywords : Group of experiments, Initial data analysis, Exploratory data analysis, Error variance and Pooled analysis of variance
Conflict of Interest : None declared
Acknowledgements/Funding : Author thankful to Kerala Agricultural University, Thrissur, 680656, Kerala, India
Author Contribution : All author equally contributed

Series of experiments or group of experiments plays an important role in agriculture. A fertilizer, pest or disease management package is also recommended after evaluating the effect of the treatments in the field for a number of years and seasons. This study is an attempt to understand the nutrient release pattern under long term permanent fertilizer application system by analysis of group of experiments. Out of the 29 years grain yield data, those years with more than ten outliers were discard and remaining 21 years’ data used for further study. As the error variances of the 21 years grain yield data were found to be homogeneous, carry out the pooled analysis. The significance of the treatment × year interaction in pooled analysis indicate that the treatment effects shows variation over the year. Treatment T6(50% RDN (Recommended Dose of Nutrients) of NPK through fertilizers + 50% through FYM during kharif and 100% RDN of NPK through fertilizers during rabi) obtained the highest yield over the years.

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