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This section discusses some of the different nutrients required by avocado trees and proper leaf analysis for determining if your trees are deficient in any of them. 

You can read more in Ch. 2 Avocado Fertilization

Avocado Fertilization Presentations can be found here: Avocado Fertilization

Additional information about nutrients can be found here : Avocado Nutrients

Mulching for Avocados and Citrus: Mulch on Avocados & Citrus

§  Avocados have few mineral deficiencies

§  Surface feeder roots are efficient at recycling nutrients back into the tree

§  Nitrogen should be applied every year, occasionally zinc and sometimes phosphorus, potassium and calcium (maybe)

§  Leaf analysis is normally used to determine mineral deficiency or excess

§  Liquid fertilizer injection is the normal way to apply fertilizers