ISA Certified Arborist
Free isa certified arborist certification practice test with 16 questions and answer explanations. Prepare for the 2026 exam with instant feedback and f...
About the Author
Dr. Maria SantosPhD Agronomy, MS Environmental Science, CHMM
Environmental Scientist & Agricultural Certification Expert
UC Davis College of Agricultural & Environmental SciencesDr. Maria Santos earned her PhD in Agronomy from UC Davis and holds a Master of Science in Environmental Science alongside her Certified Hazardous Materials Manager designation. With 14 years of field and academic experience across soil science, water quality, and sustainable agriculture, she has guided hundreds of candidates through environmental and agronomy certification exams.