Kirkuk University Journal-Scientific Studies

The study was conducted during the 2017-2018 growing season to evaluate the responses of genotypic of (Vica faba L.) to the potassium sulfate fertilizer, Spanish (LueDeotono) and Turkish (Yildiz) with five levels from potassium were (0, 10, 20, 30, and 40 mg L-3). Treatments were laid down in a randomized complete block design (RCBD) with three replication , The results of this study revealed that Turkish genotypes showed significant effects in the traits plants hight, flowers number, and yield weight, in the other hand the genotype Spanish gave a high number of leaves per plant, chlorophyll content, fresh and dry weight. Application of potassium fertilizer showed significant effect gave a higher value in plant height, the number of leaves, flower number and chlorophyll content, fresh at dry weight for the stem. The interaction between the genotypic and potassium gave a higher chlorophyll, leaves number per plant, fresh at dry weight and yield weight..

An experiment was conducted in randomized complete block design with four replicates to study the effect of spraying nitrogen fertilizer as a urea with concentration 0 , 10 , 20 , 30 mg/liter on the characters of cotton Koker 310 at summer season 2007 in experiment station of cotton research unit in mosul technical institute , all the agricultural practices were done for the end of season where study the plant height , number of nodes to the first fruit branch , number of vegetative branches , number of fruiting branches , number of bolls /plant , boll weight , seed index , lint index , lint percentage and seed cotton yield kg/h . Spraying urea fertilizer in concentration 20 mg/liter significantly exceeded from control in plant height , number of fruiting branches , number of bolls/plant , boll weight and seed cotton yield kg/h in percent 63.72 , 24.49 , 43.92 , 8.92 , 42.59% respectively while seed index significantly differed from control treatment in other used concentrations . Spraying urea fertilizer reflected significantly linear regression correlation to increase seed index and degrease lint percentage in addition to positive significant correlation for seed cotton yield with plant height , number of vegetative branches , number of fruiting branches , number of bolls /plant , boll weight and seed index .