Evaluating different rates and sources of Fe-fertilizers on soybean yield

Soybean is one of the oil seeds whose cultivation is important for preventing the import of oil and replacing meat protein with it. Given that the soybean cultivated in Iran is usually Fe-deficient due to the calcareous soil used for the cultivation and considering the role of Fe in soybean, the present experiment evaluated the effect of different rate and sources of Fe-fertilizer on soybean yield. A randomized complete block design with 4 replication and 5 treatments (0, 2, and 5 kg Fe-sulfate per 1000 liter and 5 and 10 kg/ha Fe-Sequestrin) was selected. After cultivating and farming, and for reducing the peripheral effects, soybeans were harvested from the center of each plot and their yield and yield components were determined. The obtained data were then analyzed. The results indicated that the application of 5 and 10 kg Fe-Sequestrin per hectare with the mean yield of 1845 and 2845 kg/ha significantly increased the yield (at P<0.05) in comparison to its non-application condition in the control group with the mean yield of 1542 kg/ha. The thousand-seed weight in 10 kg/ha Fe-Sequestrine and Fe-Sulfate foliar application (5 per 1000) demonstrated a significant increase.