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Different foliar treatments were applied to evaluate the recovery of iron chlorosis of orange trees (Citrus sinensis (L.) Osb. cv. 'Valencia late') grown on a calcareous soil. The treatments were: Fe (II) sulphate (500 mg Fe L -1 ), sulphuric acid (0.5 mM H 2 SO 4 ), Fe (III)-chelate (Hampiron 654 GS, 120 mg Fe L -1 ) and distilled water as a control. The recovery from iron chlorosis was evaluated with the SPAD-502 apparatus and the values converted to total chlorophyll concentration. Thedoi:10.17660/actahortic.2002.594.25 fatcat:5vrn4jxjrvdghdibcolbtnu6se