COVID-19 Update

All campus visitors must be fully vaccinated (boosted). Masks are highly recommended. Instructors & staff are required to submit a daily symptom check. COVID 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.