COVID-19 Update
All campus visitors must be fully vaccinated AND BOOSTED, wear a mask, & submit a COVID symptom check. Visit our COVID page for updates.
Instructor
Ronald Tjeerdema LinkedIn
RONALD TJEERDEMA, Ph.D., D.A.B.T., is an Associate Dean in UC Davis’ College of Agricultural and Environmental Sciences and a professor in the Department of Environmental Toxicology. He has taught for UCSC Extension since 1990.