RICE- WEED ECOSYSTEM UNDER MECHANIZED SYSTEM OF RICE INTENSIFICATION (MSRI) IN NORTH COASTAL A.P.
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Authors
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G. PRIYANKA
Department of Agronomy, Agricultural College, Acharya N.G. Ranga Agricultural University, Naira-532 185
Abstract
An experiment was conducted at the Agricultural College, Naira during Kharif, 2014 to study the correlation and regression of the grain yield of rice on certain weed and crop parameters in rice under mechanized system of rice intensification. The results revealed that the grain yield was highly negatively correlated with all the weed parameters, while the correlation was significantly positive with weed control efficiency (WCE) and weed management index (WMI). The correlation coefficient between grain yield and all crop parameters were significantly positive except with test weight, while it was significantly negative with weed index. The regression analysis indicated that there was a negative linear relationship between grain yield and dry weight of all the three groups of weeds as well as with weed density both at 50 DAP and harvest. The grain yield was reduced by 190 kg ha-1 with unit increase of weed dry weight per m-2 at 50 DAP.
References
1. Devasenapathy, P., Ramesh, T and Gangwar, V.
2. Weed management studies. Inefficiency
3. indices for agricultural management
4. research. pp. 55-64.
5. Gomez, A and Gomez, A. 1984.Statistical procedures
6. for agricultural research.2nd Edition. JohnWiley
7. and Sons Incorporation. New York, USA.
8. Hashem Aminpanah. 2014. Effects of crop density
9. and reduced rates of pretilachlor on weed
10. control and grain yield in rice. Romanian
11. Agricultural Research. No. 31.
12. Jacob, D., Elizabeth Syriac, K and Pushpakumari,
13. R. 2005. Spacing and weed management in
14. transplanted basmati rice. Madras Agricultural
15. Journal.92 (4-6): 224-229.
16. Ministry of Agriculture, 2012. Government of India.
17. Retrieved from http:// www.indiastat.com on
18. 8.2016
19. Parmeet Singh., Purshotam Singh and Joy Dawson.
20. Correlation and regression studies of
21. winter maize and weed interactions. Indian
22. Journal of Weed Science.39 (1 & 2): 21-23.
23. Patra, A.K., Halder, J and Mishra, M.M. 2011.
24. Chemical weed control in transplanted rice in
25. Hirakud command area of Orissa. Indian
26. Journal of Weed Science.43 (3&4): 175-177.
27. Ramana, A.V., Ramana Murthy, K. V and Joginaidu,
28. G. 2008. Correlation and regression analysis
29. of rice under rainfed upland conditions.The
30. Andhra Agricultural Journal. 55 (3):273-275.
31. Singh, S., Singh, G., Singh, V.P and Singh, A.P.
32. Effect of establishment methods and
33. weed management practices on weeds and rice
34. in rice-wheat cropping system. Indian Journal
35. of Weed Science. 37: 51-57.
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