The International Society of Arboriculture (ISA) Arborists' Study Guide
(2010 edition) is the required textbook.

The following topics are covered:

  • Plant Classification and Nomenclature
  • Tree Biology
  • Soil Science
  • Water and Nutrition
  • Tree Selection and Installation
  • Pruning
  • Plant Health Care and Urban Forestry
  • Risk Management and Support Systems
  • Trees and Construction
  • Tree Worker Safety
  • Plant Disorders and Diagnosis
  • Plant Identification