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Abstract
The experiment was carried out at the horticultural station in Hawija district / Kirkuk governorate during the winter agricultural season (2019-2020), with the aim of evaluating the efficiency of the Yara Complex fertilizer in improving the growth characteristics and yield of the wheat crop. The experiment included the use of two factors, the first: ground fertilization with two concentrations of the Yara complex fertilizer, which are 40 and 60 kg / du, and DAP fertilizer at a level of 80 kg / du, and the second, six genotypes of bread wheat (Dijla, Ibaa 99, chad Germany, chihan, Buro and Bohouth22). The experiment was carried out according to the split-plot system within the Randomized Complete Blocks Design (R.C.B.D). The study included some growth and yield characteristics, which are (germination percentage, plant height, number of leaves per plant, number of stems per plant, number of spikes per square meter, number of grains per spike, weight of 1000 grains and grain yield in dus). The results showed the superiority of Yara fertilization treatment of 60 kg/du in the characteristics of germination percentage, number of spikes and grain yield with means of 88.78% and 343.52 spikes/m2 and 1332.89 kg/du, The Buro cultivar excelled in the characteristics of germination percentage, number of leaves, number of tillers, number of spikes, and yield with means of 89.33%, 6.67 leaves/plant, 9.11 tillers/plant, 351.9 spikes/m2 and 1449.22 kg/du. The interaction of Yara fertilization treatment 60 kg/du with Boro cultivar was superior in the characteristics of germination percentage, number of leaves, number of spikes and grain yield with means of 90%, 6.67 leaves/plant, 386.27 spikes/m2 and 1520.7 kg/du
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