National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Potato (Solanum tuberosum L.) popularly known as ‘The king of vegetables’, has emerged as fourth most important food crop in India after rice, wheat and maize. In the year 2002-2003, the production was 25 million tonnes while it was 5 million tonnes during 1970. India ranks 4th in area and it is the 3rd largest country in world in production of potato after China and Russian Federation. Potato is produced in an area of 14.00 lakh ha with a production of 250 lakh tonnes and productivity of 17.86 ton per ha. In West Bengal area under potato cultivation was 405.54 thousand ha, production was 7600 thousand tones with a productivity of 21.383 t ha-1 (2007-08). The field experiment was carried out at the Instructional farm of Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal during the rabi season of 2009-10 and 2010-11. Experiment was laid out in a Randomized Block Design with eight different levels of nitrogen: 75 Kg N /ha (T1), 90 Kg N /ha (T2), 105 Kg N /ha (T3), 120 Kg N /ha (T4), 135 Kg N /ha (T5), 150 Kg N /ha (T6), 165 Kg N /ha (T7) and 180 Kg N /ha (T8). The treatments were replicated thrice. The crop management practices were optimum and an uniform dose of 100 kg P2O5 and K2O/ha was applied in all the plots. The seed tubers were planted on 8th December 2009 and 10th December 2010 for the experimentation. The treatment 120 Kg N /ha (T4) recorded highest values in most of the yield attributes. Tuber Bulking Rate was recorded maximum (52.55 and 63.21 during 2009-10) with the level of 120 kg N ha-1 at 40-60 and at 61-80 DAP. Moreover, it was recorded maximum (53.08 and 63.84 during 2010-11) with the level of 120 kg N ha-1 at 40-60 and at 61-80 DAP. The maximum net return of Rs 31667.78 and benefit cost ratio (0.49) was observed in the treatment T4 which having the highest return cost ratio at 2009-10. It was found that the same trend was followed in the next year i.e. 2010-11 with the maximum net return of Rs 34277.78 and benefit cost ratio (0.53). So, we can say that at T4 the maximum return could be found and at T7 and T8 higher dose of nitrogen gave negative impact on yield and gave the lowest returns.
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