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Various unusual leaf patterns appearing on olive trees, often associated with poor tree growth, may be due to a deficiency of one of the mineral-nutrient elements studied in this investigation—nitrogen, phosphorus, potassium, or magnesium. Results of a two-year sand-culture experiment are here presented by a series of leaf analyses, growth measurements of the trees, and color photographs of the leaf symptoms obtained.

The effect of certain mineral deficiencies on the growth, leaf appearance, and mineral content of young olive trees