Study of the response of Wheat against weeds as affected by cultivar and fertilizer application method.

In order to study the competitive ability of wheat against weeds as affected by cultivar and nitrogen fertilizer application method, an experiment was conducted under farm condition in 2015-2016. The experiment design was factorial arranged in RCBD with three replications. The treatments were: A factor included wheat cultivars(Atilla, Sirwan, Chamran2, Shiroodi and Atilla weed polluted as control), B factor included nitrogen fertilizer application method included (broadcasting, strip application and split application). Urea fertilizer was used as Nitrogen source. Results showed that the highest weed dry weight (10.74g) obtained from broadcast application of fertilizer and the lowest weed dry weight (5.53g) obtained from split application of fertilizer. The highest dry weight of weeds belonged to Sirwan cultivar and broadcast application of fertilizer and The lowest dry weight of weeds belonged to Chamran 2 and Shiroodi cultivars and split application of fertilizer. competitive ability of Sirwan and Chamran 2 cultivars against weeds , was less than other cultivars and density and dry weight of weeds was more in different stages of sampling. The highest yield belonged to split application method and the lowest yield belonged to broadcasting method of fertilizer application.