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Coronavirus (COVID-19) Update
Our courses are taught remotely through spring 2021. Please check our coronavirus update page for our latest announcements.
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.