Department of Vegetable Science, N.D. University of Agriculture and Technology, Kumargunj, Faizabad 224229 (up).
Two years data showed significant improvement towards tuber yield due to different dates of planttng, nitrogen levels and their interaction. November 1st planting proved to be beneficial than later dates and highest tuber yield (500 q/ha) was recorded in case of 200 kg N/ha and 1st November planting with maximum net return as well.
