Mahmood , M.; Bee , O. B.; Mohamed, M. T. M.; Subramaniam, S. EFFECTS OF ELECTROMAGNETIC FIELD ON THE NITROGEN, PROTEIN AND CHLOROPHYLLCONTENT AND PEROXIDASE ENZYME ACTIVITY IN OIL PALM (ELAEIS GUINEENSIS JACQ.)LEAVES. Emir J Food Agric 2017, 25, 471-482.