This document is SL 204, a fact sheet of the Soil and Water Science Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. First printed: January 2003. SL 204/SS423: Micronutrient Deficiencies in Citrus: Iron, Zinc, and Manganese (ufl.edu)
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Zekri et al. (1969) studied this question.
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