1) ANDO, T., FUJITA, K., MAE, T., MATSUMOTO, H., MORI, S., and SEKIYA, J.: Plant Nutrition for Sustainable Food Production and Environment, pp.415-416, Kluwer academic, Tokyo, 1997
2) CINELLI, F. Physiological responses of clonal quince rootstocks to iron-deficiency induced by addition of bicarbonate to nutrient solution. J.Plant Nutrition., 18 (1), 77-89, 1995
3) GRAHAM, M. J., STEPHENS, P.A., WIDHOLM, J. M.and NICKELL, C. D. Soybean genotype evalua-tion for iron deficiency chlorosis using sodium bicarbonate and tissue culture. J. Plant Nutrition., 15 (8), 1215-1225, 1992