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A field trial was made to study the effect of spraying different Iron concentrations with different dates on yield and mineral contents of mature Valencia orange trees grown in sandy soil at Salhia area in Sharkia Governorate. It is advisable to spray the Valencia orange trees under the similar conditions with chelated iron at 0.7% on March. Nitrogen and phosphorous contents in leaves of sprayed trees slightly decreased as the rate of chelated iron increased, whereas potassium content decreased, whereas Iron content generally increased.

Effect of Concentrations and Frequency of Iron Foliar Application on Yield and Leaves Mineral Content of Valencia Orange Tree