A greenhouse experiment was conducted to study the response of corn plant to foliar application of cations , i.e., iron (Fe) and manganese (Mn) at different rates of ‘00 mg/L , 200 mg/L and 400 mg/L as well as cobalt (Co) at rates of 25 mg/L, 50 ‘ng/L and 100 mg/L along with the interactions between them, i.e.,(Fe+Mn) ,(Fe +Co), Vln+Co) and (Fe+ Mn +Co). Each combined pair of elements that tested for 'iteractions were applied at two rates. Results revealed that application high rate of Fe generally decreased dry razer production of leaves, root and consequently total plant dry weight of corn. «Ico'fing high rates of Mn and Co caused adverse effect for leaves as compared to a: xntrol. Also , the combined treatments increased the dry matter production of went corn plant organs in spite of the relatively adverse effect for interaction men (Fe+Mn). Data also revealed that Fe,Mn and Co treatments, individually or in rclnation with different rates, generally increased their uptake by different plant xgzrs as compared to control treatment .In addition the tested heavy metals Fe , Mn to: Co were accumulated in root as compared to either leaves or stem . However, excessive supply of Fe,Mn individually and/or combined with them teased Fe uptake by leaves and root. The opposite trend was true when cobalt ‘5 applied with different rates . Also ,high rate of combined interactions between :2- 'Fe+Mn),(Fe+Co) and (Fe+Mn+Co) show a positive effect on Fe uptake by root I:mpared to leaves and/or stem . Generally, Mn uptake by total plant and different plant organs were "eased as a result of foliar application with high rates of Fe and Mn; the opposite - arc was true when Co applied with different rates for both leaves and root. The motion treatments (Fe+Mn) shows a negative effect on Mn uptake by com plant r3265 (leaves, stern and root) .High rate of double and triple interactions were moulated Mn in both stem and total corn plants. Finally, carbohydrate fractions content (total carbohydrate (TC), soluble mchydrate (SC) and insoluble carbohydrate ([80) generally increased in different be". organs (leaves, stem and root) as affected by applied Fe,Mn and Co either nan-dually or combined with them as compared to control treatment .In general , high 1‘: of Fe decreased carbohydrate fractions content in both leaves and stems. Similar 1'2": was obtained for different plant organs when Mn was applied with high rate rim decreased TSC and NSC distribution. The high rate application of Co increased rt: accumulated carbohydrate fractions in both leaves and stem. Interaction effects 2" stadied heavy metals (Fe, Mn and Co) were hazard for all carbohydrate fraction for :n'e'ent plant organs. ‘eywordsz-iron, manganese, cobalt, uptake corn plant , nutrients and plant growth ,nutrients interaction , carbohydrate fractions content in plant.