An experiment was conducted under All India Co-ordinated Research Project on Dry land Agriculture (AICRPDA), Biswanath Chariali Centre of Assam Agricultural University to optimize the sowing window of both red eyed and white eyed small tuber of potato in Assam. The experiment was conducted at AICRPDA research field of Biswanath College of Agriculture in three years from 2013, 2014 and 2015 consisting four dates of sowing (1st October, 16th October, 1st November and 15th November) and two variety of small tuber (Red eyed and white eyed) and Kufri Pokhraj (recommended improved variety) as control. From the study it has been observed that yield of the small tuber potato reduces with advancement of the dates of sowing and benefit cost ratio was comparatively more in 15th October sowing than 30th October in both red eyed and white eyed tuber. Similar trend of results was also observed in On-Farm Trials (OFT) conducted in three Krishi Vigyan Kendra (KVK) of Assam Agricultural University, Jorhat, Assam and optimum sowing window of small tuber potato was found best within the month of October , however but 15th October sowing was superior in yield and B:C ratio over 30th October sowing.
Sowing window, On Farm Trial, White eyed, Red eyed, Small tuber
