1. Agarwala, S. C., Sharma, C. P. and Kumar, A. 1964 Interrelationship of iron and manganese supply in growth, chlorophyll and porphyrin enzymes. Plant Physiol.39, 603–609.
2. Alam, S. Manzoor, Karin, A. Q. M. B., Khan, Abdul Baten and Habibullah, A. K. M. 1966 Study of the interaction of iron and manganese and their effects on the uptake of phosphorus in rice plants by a radiosotope technique. Proc. Agric. Symp. 82–90.
3. Alvarez-Tinaut, M. C., Leal, A., Agüi, I., Recalde, L. 1977 Estudio de la interacción Boro-Manganeso en plantas de tomate. II..- Absorción y distribución de macronutrientes. Ann. de Edaf. y Agrobiol.In press.
4. Berger, K. C. and Gerloff, G. C. 1947 Manganese toxicity of potatoes, in relation to strong soil acidity. Soil Sci. Soc. Am. Proc.12, 310–314.
5. Brown, J. C., Holmes, R. S. and Tiffin, L. O. 1961 Iron chlorosis in soybeans as related to the genotype of rootstock 3.-chlorosis susceptibility and reductive capacity at the root. Soil Sci.91, 127–132.