The impacts of water deficit stress, nitrogen (N) application rate and cultivar and their combination on sesame seed quality have not been previously studied. Hence, field experiments were conducted in a semi-arid area of Iran during the 2016 and 2017 growing seasons. The experiments were carried out in a randomized complete block design arranged in split factorial with three replications. Water deficit and full irrigation regimes were allocated to the main plots and factorial arrangement of sesame cultivars (Naz, Oltan and Dashtestan) and N rates (0,60 and 120 kg N ha-1) were randomized to the sub-plots. The results indicated that an increase in N rate (0-120 kg N ha-1) could enhance sesame grain yield by 62%, 112% and 70% under full irrigation conditions and by 32%, 55% and 67% under water deficit irrigation conditions in Naz, Oltan and Dashtestan cultivars, respectively. Water deficit irrigation caused a...

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