CHT Study Guide 2026
Everything you need to pass the CHT exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CHT Exam Format at a Glance
📚 CHT Topics to Study (22)
✍️ Sample CHT Questions & Answers
1. Damping-off in seedling production is caused primarily by:
Damping-off is caused by Pythium, Rhizoctonia, or Fusarium fungi that attack seedlings at or below the soil line in overly wet, warm propagation environments.
2. The primary purpose of bottom heat in a propagation bench is to:
Bottom heat raises the temperature of the rooting medium (ideally 65–75°F), accelerating callus formation and root initiation in cuttings.
3. A landscape technician notices an irrigation leak on a client's property not included in the current service contract. The best action is to:
Documenting and promptly notifying the client of observed issues protects both the client's property and the technician's professional standing and liability.
4. Girdling roots are a serious concern for trees because they:
Girdling roots encircle the trunk and progressively constrict vascular tissue as both trunk and root grow, eventually causing decline or tree death.
5. What is a recommended mowing height for most turfgrasses?
A mowing height of 2.5 to 3.5 inches is generally recommended for most turfgrasses because it promotes deeper root growth, which makes the grass more drought-tolerant and resilient. Taller grass blades also shade the soil, reducing weed germination and moisture evaporation. Mowing too short (like 1 inch or less) can stress the turf, making it more susceptible to diseases, pests, and environmental damage.
6. Which symptom is most characteristic of oak wilt disease?
Oak wilt (Bretziella fagacearum) causes rapid wilting and bronzing starting at leaf margins and tips, moving inward; red oaks can die within weeks of infection.