Nine years old Washington Navel Orange Trees grow on clayey soil at Ashmoun District, AlMenoufya Governorate, Egypt; were sprayed with calcium chloride at 1, 2 and 3%, calcium nitrate at 1, 2 and 3% and calcium chelate at 1000, 2000 and 3000ppm at 3 spraying dates; 15th of April, 15th of June and 15th of August. Results indicated that spraying nutrients increased N, P, K and Ca content in leaves compared with the untreated trees. Meanwhile, yield as number of fruits and number of fruits/tree were significantly improved by spraying different nutrient especially when sprayed with calcium nitrate or calcium chloride at 3%. Creasing and fruit cracking/trees were significantly decreased by spraying calcium chloride at 3%. However fruit quality (physical and chemical characteristics) were significantly improved by spraying different nutrient treatments at higher concentrations.