Abstract

A field experiment was carried out in sandy loam soil in Dawayahregion, which is located in northern Falluja district-Al-Anbar government in summer season of 2013. This experiment aimed to study the effect of three concentration of Iron (0, 75,100 mg Fe.L-1)and three concentration of Boron (0, 0.75, 1.50 kg B.ha-1) in growth characters for two varieties of soybean (Industrial2, Lee 74) .split-split plot design were used which distributed according to R.C.B.D. design for three replications, the results were summarized as follow:
The effect of Fe levels were significantly differed in all studied characters, where the concentration 150 mg.L-1 gave the highest average of plant height, number of branches, leaf area per plant, plant dry weight, the main root length, and Fe and B concentration in leaves in increasing percent 5.07, 12.14, 6.86, 9.94, 8.36, 1.19 and 6.78% in compared with the control (Fe0) which gave the lowest average of all those traits respectively.Result showed levels of the concentration 1.50 kg B.ha-1 gave the highest average for the mentioned traits in significantly increasing percent of19.04,53.79,36.42,31.97,18.82, 3.15 and 36.92% comparingwith the control respectively.
Lee 74 was superior in leaf area and B concentration in leaves comparing with Industrial 2which in turn was superior in plant height while there were no significant differences between the two varieties in number of branches per plant, plant dry weight, the main root length and Fe concentration in leaves.The two-way interaction between variety and B significantly affected in leaf area, root length, B concentration in leaves, whereas the interaction between B and Fe significantly effected in B concentration in leaves. The three-way interaction significantly effected in leaf area.