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Kansas Center for Agricultural Resources and the Environment (KCARE)

Livestock Researchers

Joel DeRouchey

Dr. Joel DeRouchey is a professor of Swine Nutrition and Management in K-State’s Department of Animal Sciences and Industry. His research interests include livestock nutrition’s influence on nutrient management plan requirements and new technologies relating to manure storage and nutrient separation. In his role as State Extension Leader, Dr. DeRouchey’s environmental extension program assists livestock producers with regulations, nutrient management plans, new animal waste handling technology.

He received his Bachelor of Science degree from South Dakota State University before coming to K-State for both his master’s and Ph.D. studies. Dr. DeRouchey has been part of the K-State faculty since 2001.

Learn more about Dr. DeRouchey’s research.

Jaymelynn Farney

Jaymelynn Farney is an assistant professor in the Animal Sciences and Industry Department at K-State. As a beef systems specialist, Dr. Farney is part of the K-State team on the Great Plains Grazing Project, researching the resilience and vulnerability of beef cattle production in the Southern Great Plains under changing climate, land use, and markets. Among other subjects, she studies cover crops and forage production for the project.

Dr. Farney received her Bachelor of Science degree from K-State in 2007, and her Master’s Degree from Oklahoma State University in 2009. She returned to K-State for her Ph.D. studies, where she earned her doctorate in 2012. 

Get more details about Dr. Farney and her work.

Zifei Liu

Dr. Zifei Liu is an Assistant Professor in K-State’s Department of Biological and Agricultural Engineering. He is an air-quality specialist, whose projects involve smoke management for prescribed burning. Dr. Liu’s work promotes science-based information on smoke management and smoke impact, and he provides educational workshops on this subject. He also has livestock projects, including better waste management for producers, investigations on livestock emissions, life cycle assessment of environmental impact of livestock emissions, and comparing footprints of different feed and management systems.

Dr. Liu has been a faculty member since 2012. Before joining K-State, he spent two years at Michigan State University, as a post doc working with animal nutritionists on dietary strategies for mitigating air emissions from livestock operations.

Discover more about Dr. Liu’s research.

Justin Waggoner

Justin Waggoner is an associate professor and extension specialist in the Department of Animal Sciences and Industry at K-State whose work examines the influence of nutrition and management practices on cattle health and performance. Dr. Waggoner is part of the Great Plains Grazing project as a beef systems specialist, studying the resilience and vulnerability of beef cattle production in the Southern Great Plains under changing climate, land use, and markets. His work specifically focuses on topics such as nutrition and supplementation, ammoniation of forages, and the nutrition and management of early-weaned calves.

A native of Kansas, Dr. Waggoner attended KSU for his B.S. and M.S. degrees in Animal Science. He received his Ph.D. in Ruminant Nutrition from New Mexico State University.

Learn more about Dr. Waggoner.