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Effect of nitrogen rates and weed interference on yield and yield components of corn (zea mays)

Safar Nasrollahzadeh, Aysan Hajebrahimi, Jalil Shafagh-Kolvanagh, Sajjad Shaker-Kouhi

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Int. J. Agron. Agri. Res.7(1), 1-6, July 2015


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Time of weed control and fertilizer application usually decide the profitability of crop production. The effects of nitrogen and weed interference duration on yield and yield components of corn was studied in the Research Station of University of Tabriz, Iran, in 2009. The experiments were carried out as split-plot, based on randomized complete block design with three replications. Nitrogen application rates (0, 70 and 140 kg/ha) were included in the main plots and 10 weed interference periods(two sets: weedy control and weed-free control) in subplots. Results showed that with increasing weed interference period, number of grain per ear, number of grain rows per ear, 1000 seed weight and grain yield decreased. The most sensitive yield components to weed interference were the number of grain per ear. Also, nitrogen levels had not significant effect on yield and yield components. However,the maximum corn grain yield (970 g/m2) was obtained with the control treatment full season weed-free.


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Effect of nitrogen rates and weed interference on yield and yield components of corn (zea mays)

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