Arborist Safety PPE: What You Will Be Tested On
"PPE and climbing safety is heavily tested on the ISA exam. Learn chainsaw PPE, climbing harness specs, and ANSI Z133 safety rules."
Chris ComerApril 22, 2025Arboriculture Concepts
Core arboriculture topics tested on the exam, including pruning, risk, soils, biology, and diagnostics.
Most recent articles in Arboriculture Concepts
Chris ComerApril 22, 2025ISA Exam Glossary: Core Terms You Must Know
"The 50+ ISA exam vocabulary terms most likely to appear on your test — from CODIT to CRZ, fascicle to phenology, and TPZ to WLL."
Chris ComerApril 18, 2025Tree Identification and Selection: How to Study Efficiently
"Tree ID is 9% of the ISA exam. Use the MAD HORSE mnemonic, leaf morphology, and gymno/angiosperm concepts to study efficiently."
Chris ComerMarch 10, 2025Tree Risk Management and Risk Assessment Basics
"Tree Risk is 11% of the ISA exam. Learn the 3-level assessment system, failure targets, risk mitigation options, and TRAQ qualification."
Chris ComerMarch 6, 2025Tree Protection During Construction: Study Guide
"Trees and Construction is 9% of the ISA exam. Study TPZ/CRZ calculations, protection fencing, and construction damage mitigation."
Chris ComerMarch 2, 2025Urban Forestry Fundamentals for the ISA Exam
"Urban forestry covers 6% of the ISA exam. Study tree appraisal methods, CTLA guide, tree inventory, and urban tree selection concepts."
Chris ComerFebruary 26, 2025Diagnosis and Treatment: Pests, Diseases, and Disorders
"ISA exam diagnosis questions cover biotic vs. abiotic disorders, IPM, PHC plans, and common tree diseases like oak wilt and Dutch elm."
Chris ComerFebruary 22, 2025Pruning Standards (ANSI A300) Explained for ISA Candidates
"Pruning is 14% of the ISA exam. Understand ANSI A300 standards, crown cleaning/thinning/raising/reduction, and the 3-cut technique."
Chris ComerFebruary 18, 2025Tree Biology and Physiology Cheat Sheet for ISA Candidates
"A cheat sheet of ISA exam tree biology concepts: CODIT, xylem/phloem, cambium, photosynthesis, and key anatomy terms."
Chris ComerFebruary 14, 2025Safe Work Practices and ANSI Z133: What the ISA Exam Tests
"Safe Work Practices is 15% of the ISA exam. Learn the ANSI Z133 safety standards, PPE requirements, and climbing safety concepts tested."
Chris ComerFebruary 10, 2025Installation and Establishment: ISA Exam Study Notes
"Covers tree planting techniques, nursery stock types, root flare depth, and establishment best practices for the ISA arborist exam."
Chris ComerFebruary 6, 2025Soil Management for the ISA Exam: Key Concepts and Common Questions
"Soil management is 7% of the ISA exam and one of the hardest sections. Study the soil triangle, pH, CEC, and compaction concepts here."
Chris ComerFebruary 2, 2025