Document Type : Primary Research paper
Agriculture College, AL-Qasim Green University, Iraq
The experiment was conducted in the field of the College of Agriculture of the Department of Field Crops - Al-Qasim Green University during the agricultural season (2018-2019) to study the effect of the interaction of spraying humic acid with urea fertilizer, high-potash fertilizer and neutral fertilizer on the yield of wheat IPA 99 cultivar. The experiment included two factors, namely, the spraying of organic fertilizers represented by humic acid at two levels (without spraying and spraying), which are symbolized by (H0 and H1) respectively. The second factor is the spraying of chemical foliar fertilizers, which includes four treatments (the non-addition treatment, urea spray, high potash spray, and neutral spray). The study was conducted according to global experiments using a randomized complete block design (RCBD) with three replications. The results were as follows that spraying the H1 humus led to an increase in the area of the flag leaf by 29 cm2, an increase in the number of leaves 5.3%, the number of tillers 10.2%, the weight of 100 grains 8.4%, The spraying of chemical nutrients also led to a significant increase in most of the traits compared to the control treatment, and the types of fertilizers did not differ significantly from each other. The interaction of high potash fertilizer and humus spraying achieved the highest value in leaf area (cm2) 20%. The number of leaves is 5.3%, the number of tillers 22%, and the weight of 100 grains 22.1%.