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Abstract
In order to study the effect of seed quality (SQ), seed rate (SR), and nitrogen rate (NR) on yield and yield components of wheat, an experiment was conducted as a factorial-split plot based on the randomized complete block design with four replications in Golestan Province, Iran. Treatments included the combination of SR and NR (recommended rate, 15 and 30% higher than the recommended rate) as the main plots, and SQ (control, 15, 30 and 45 h of accelerated aging) as the subplots. The interaction of NR × SR was significant on 1000-seed weight, seed yield, plant height, the number of seeds, biological yield, and harvest index. There was a significant reduction in all traits with an increase in seed aging. Seed yield had a significant and positive correlation with yield components. Using higher density and applying higher nitrogen fertilizer than those of recommended could reduce the negative effects of seed aging in wheat.