Dr. Zimdahl obtained his Ph.D. in Agronomy from Oregon State University. He joined the faculty at Colorado State University in 1968 and has led a research program in weed management and soil degradation of herbicides with the production of many graduate students. Dr Zimdahl has always had a keen interest in foreign agriculture and culture and has acted on those interests with Fulbright grants, visiting professorships, and other international programs such as United Nations/FAO committees. He has worked in and visited many countries including Turkey, Italy, Argentina, India, Philippines, Morocco, and Germany.