Fertilizer Effects upon Micronutrient Nutrition of the Avocado

Deficiencies of micronutrients in avocado trees are often an important problem in southern California avocado orchards. Results of recent research show more clearly that fertilization practice has an important influence on the micronutrient nutrition of avocado trees. Specifically, this paper presents 3 years of research data from a field experiment dealing with the effects of soil applications of nitrogen, phosphate, potash, dolomite, and steer manure on the micronutrient (zinc, copper, manganese, boron, iron) concentrations in the leaves from Fuerte avocado trees. Effects of soil applications of the above mentioned fertilizers of the macronutrient (nitrogen, phosphorus, potassium, calcium, magnesium, sodium, chloride) concentrations in Fuerte avocado leaves from this experiment has been reported by Embleton et al. (2).