INFLUENCE OF LEVELS OF NITROGEN AND MOWING ON GRAIN YIELD AND ITS COMPONENTS FOR BARLEY CROP (HORDEUM VULGARE L.)

A field experiment was conducted at Al-Hilla, Babylon province and for the two seasons 2017-2018 and 2018-2019.To know the effect of different levels of nitrogen (140,60,0 and 220 kg N.ha -1 ) and the number of Mowing (without mowing and one and two mowing) and their interaction in the yield and quality of grain for barley crop cultivar bohuth 244.In this experiment, the split plots were used with three replicates, Nitrogen levels were occupied by the main plots and the number of Mowing in the subplots.The results showed that adding of nitrogen fertilizer resulted in a significant increase in the studied traits of the two seasons except for the number of grains/spike and the weight of 1000 grains for the first season and The treatment 220 kg /N.ha -1 excelled in each of the numbers of spikes/m 2 , number of grain/ spike, weight of 1000 grain for the second season, and grain yield for the two seasons.As for the effect of the Mowing, it showed a significant effect on all the studied traits, and the treatment without Mowing was distinguished in both the number of grain/spike, the grain yield for both seasons, and the weight of 1000 grains for the second season only.No significant difference with the treatment one Mowing showed in the trait of the number of spikes/m 2 for both seasons and the weight of 1000 grain for the first season.