The Yu Biogeochemistry Lab in the Department of Natural Resources and Environmental Sciences at the University of Illinois at Urbana-Champaign is seeking a PhD student to begin Fall 2022. The position will be fully funded through a combination of research and teaching assistantships. We are specifically looking for applicants interested in the interactions between hydrology and nitrogen biogeochemistry in US midwestern agroecosystems. The selected individual will lead efforts in examining water age/sources and nitrogen dynamics in a mesoscale agricultural watershed in central Illinois using water isotopes, nitrate isotopes, high-frequency nitrate sensor, and existing long-term (3 decades) river hydrology and chemistry data. Candidates from diverse disciplinary backgrounds are welcome. Interested candidates are encouraged to contact Dr. Zhongjie Yu at zjyu@illinois.edu with the following attachments: (1) a brief statement of research interests and experience, (2) resume/CV, and (3) contact information for 2 professional references. The Yu lab is motivated to maintain a diverse and inclusive lab environment; students from under-represented groups are encouraged to apply. Official applications are due March 15, 2022.