Ruijun Qin received the M.Sc. degree in soil science from the Chinese Academy of Agricultural Sciences, Beijing, China, and the Ph.D. degree in agronomy from the Swiss Federal Institute of Technology (ETH Zurich), Zürich, Switzerland. He is currently an Extension Agronomist with Oregon State University's Hermiston Agricultural Research and Extension Center, Hermiston, OR, USA, and an Associate Professor with the Department of Crop and Soil Science, Osun State University, Osogbo, Nigeria. He was with the San Joaquin Valley Agricultural Research Center, USDA-ARS, Washington, DC, USA, and the University of California, Davis, Davis, CA, USA. He plays a key role in organizing growers' meetings and field days in Northeastern Oregon and Southeastern Washington. His extension and research efforts focus on nutrient and water management, crop production, cropping systems, cover crops, organic amendments, environmental quality, and soil health.