Dr. Pan Ming Huang (deceased) was the professor emeritus of soil science at the University of Saskatchewan, Saskatoon, Saskatchewan, Canada, and served for 44 years in that institution. He received his BSc (1957) from the National Chung Hsing University, Taiwan; his MSc (1962) from the University of Manitoba; and his PhD (1966) from the University of Wisconsin, Madison, Wisconsin. His research work signicantly advanced the frontiers of knowledge on the formation, chemistry, nature, and surface reactivity of mineral colloids, organic matter, and organomineral complexes in soils and sediments and their role in the dynamics, transformations, and fate of nutrients, toxic metals, and xenobiotics in terrestrial and aquatic environments. His research ndings, embodied in well over 300 refereed scientic publications, are fundamental to the development of sound strategies for managing land and water resources in the Earth’s critical zone. In addition to developing and teaching courses in soil physical chemistry and mineralogy, soil analytical chemistry, and ecological toxicology, he trained and inspired MSc and PhD students and postdoctoral fellows, and received visiting scientists from all over the world. He served on numerous national and international scientic and academic committees. He also served as a member of editorial boards, including the Soil Science Society of America Journal. He served the International Union of Pure and Applied Chemistry and the International Union of Soil Sciences in a number of capacities. He received the Distinguished Researcher Award from the University of Saskatchewan, the Soil Science Research Award from the Soil Science Society of America, the Distinguished Alumnus Award and the Chair Professorship Award from the National Chung Hsing University, and the Y. Q. Tang Chair Professorship Award from Zhejiang University. He was a fellow of the Canadian Society of Soil Science, the Soil Science Society of America, the American Society of Agronomy, the American Association for the Advancement of Science, and the World Innovation Foundation.