An experiment entitled, "Effect of nitrogen and sulphur on growth, yield and quality of mustard [Brassica juncea (L.) Czern and Coss] varieties was conducted during rabi seasons of 2016-17 and 2018-19. The experiment was conducted in a split plot design with three replications taking three levels of nitrogen (0, 50 and 100 kg N ha–1) three sulphur levels (0, 25 and 50 kg S ha–1) and three mustard varieties (Vardan, Bio 902 and RH 30). The soil of the field was low in nitrogen and medium in phosphorus and potassium and slightly alkaline in reaction.