Effect of different foliar iron chelates on growth and nutrient contents of cotton plants

A POT experiment has been conducted with cotton [var. Giza 75] to study the effect of using several concentrations of different Fe-chelated compounds as foliar application on the growth and nutrient content of cotton plants. Results showed that concentrations exceeding 50 ppm Fe have a negative effect on the growth and mineral content of the plant organs. The chelating agent of a given compound was proved to be essential factor for its efficiency. The best were the compounds containing ligninpolycarboxcylates phenolic acid + sulphate or lignosulphonate followed by those contain EDDHA. The compound containing EDTA was less effective