Abstract

A field experimentwas conducted at Assam Agricultural University, Jorhat during the rabi season of the year 2013–14 with a view to study the effect of sowing dates and doses of nitrogen on growth and yield of yellow sarson. Experimental findings revealed that among the different dates of sowing, delay in sowing of the crop from 25 November to 15 December led to a significant reduction in the growth and yield attributing characters that consequently led to yield reduction. Highest seed yield (724.7.1 kg/ha), stover yield (2036.52 kg/ha), net returns (Rs. 33253:07) and benefit: cost ratio (2.09) were recorded at 25 November sowing, whereas the seed and stover yield decreased significantly due to delay in crop sowing. The yield attributing characters, seed and stover yield increased significantly up to 80 kg N/ha which was at par with 60 kg N/ha. Among the different nitrogen levels, highest benefit: cost ratio (1.89) was found in 60 kg N/ha.