Title: Identify types of tree disorders.
Course: Community Forestry and Tree Management (18502-III) > Section: Investigating Tree Disorders

Identification should include disorders caused by

- abiotic factors
  - weather
  - nutrient deficiencies
  - unfavorable soil properties
    - pH
    - fertility imbalances
    - moisture extremes
    - temperature extremes
    - chemical toxicity

  - human factors (e.g., pollution, injury)
  - biotic factors
    - pests
    - competition
    - allelopathy.

Process/Skill Questions:

- What is the difference between a biotic factor and an abiotic factor?
- What are examples of human-caused tree disorders?