"Growing Avocados in Ventura County" 

A reference handbook available here to download for your use.  It's broken by chapters and sections for easier navigation to a particular topic. 

Diseases 
Economics 
Fertilization 
Fire 
Frost Control/Freeze Damage 
Harvesting 
Horticulture 
Irrigation 
Miscellaneous 
Pest Control 
Physiological 
Resources 
Laurel Wilt Disease in Florida 
Why Water 
Interpreting Soil and Leaf Analyses 
Avocado Brainstorming 2018

Soil and Plant Testing Labs in California 2024

 Gary Bender's Avocado Book: Bender's Avocado Book