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The research work to investigate nitrogen concentration in leaf blades and petiole of bearing mango trees were carried out during 1996-97, 1997-98. Further more, effect of nitrogen and calcium carbide on quality of mango fruit were also studied. In fertilized trees, concentration of nitrogen remained significantly higher in leaf blades than those of the unfertilized trees. The same behavior came into evidence in case of nitrogen concentration in leaf petiole. Higher concentration of nitrogen was found in April, which decreased during March, October and September gradually. Fruit obtained from fertilized trees showed higher total soluble solids and low acidity as compared to control. Influence of calcium carbide (CaC2) on fruit quality was found better interms of total soluble solids, organoleptic quality, acidity and intensity of wrinkling.
