In order to Study of yield and yield components of black mustard (Brassica nigra) in condition of sulphur fertilizer application and water stress, a field experiment was conducted at research farm of Payame Noor University of Zahedan during crop season of 2010-11. The treatments consisted of three levels of irrigation: no irrigation, one irrigation at 45 days after sowing (DAS) and two irrigations at 45 DAS and 90 DAS, in main plots and four levels of sulphur: 0, 15, 30 and 45 kg.S/ha, in sub-plots. The results showed that application of two irrigations than one and no irrigation significantly enhanced seed and biological yield, and harvestindex.The increasing level of sulphur increased dry matter accumulation, seed and biological yield and harvest index.
