The importance of iron (Fe): it acts in the transfer of electrons, activates enzymes. It participates in nitrogenase, a key enzyme of FBN (Biological nitrogen fixation).
The typical symptom of iron (Fe) deficiency is characterized by a decrease in the production of chlorophyll by the plant.
Iron (Fe) deficiency always starts in young leaves. In the initial stage, the areas between the veins of the leaflets of the soybean leaves start to show a yellowish color. As the deficiency progresses, the veins also turn yellow and, finally, the entire leaf becomes almost white.
