Response of Heat Tolerant Variety (Kufri Surya) of Potato (Solanum tuberosum) under Different Levels of Nitrogen

Keeping in view, the deficiency of detailed information on adoption of heat tolerant potato (Solanum tuberosum) variety ‘Kufri Surya’ in Terai Agro-Climatic situation of West Bengal, the field experiment was conducted at the Instructional farm of Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal during the rabi season of 2016 to study the effect on heat tolerant variety (Kufri Surya) with different nitrogen levels. Experiment was laid out in a Split-plot design taking two varieties ‘Kufri Jyoti’ and ‘Kufri Surya’ as main plot with six different levels of nitrogen of 0 kg N ha-1, 50 kg N ha-1, 100 kg N ha-1, 150 kg N ha-1, 200 kg N ha-1 and 250 kg N ha-1 as subplot. Results of the experiment showed that the higher values of the growth attributes like dry matter accumulation, leaf area index, in all the sampling dates of experimentation was recorded with 100 kg N ha-1. Owing to the higher leaf area index and dry matter accumulation in shoot, tuber yield was recorded highest from the treatment having 100 kg N ha-1 (28.46 t ha-1).