Dr. Doug Tolleson



Associate Professor & Rangeland Scientist


Rangeland vegetation monitoring, grazing and fire management


Ph.D. Rangeland Ecology and Management, Texas A&M University
M.S. Physiology of Reproduction, Texas A&M University
B.S. Animal Science, Texas A&M University


(325) 387-3168




Visit Website


Texas A&M AgriLife Research – Sonora
P.O. Box 918
Sonora, TX 76950-0918

Doug Tolleson is associate professor and rangeland scientist at the Texas A&M Agrilife Research Sonora Research Station. Dr Tolleson was an extension specialist and research scientist at the University of Arizona V Bar V Ranch Experiment Station near Camp Verde Arizona from 2008 to 2016. Prior to obtaining his Ph.D. in Rangeland Ecology and Management at Texas A&M University in 2007, he was Director of the Grazingland Animal Nutrition Laboratory here in the Department of Ecosystem Science and Management. Dr Tolleson conducts research on rangeland vegetation monitoring with which to inform grazing and fire management efforts and employs near infrared reflectance spectroscopy to study grazing animal nutrition and physiology.

Contact Us

We have moved! After a restructuring that occurred in January 2020, our department and the Department of Wildlife and Fisheries Sciences disbanded. From the restructuring, two new departments were formed. Visit the new departmental sites for up-to-date information. 

Learn More:
Ecology and Conservation Biology
Rangeland Wildlife and Fisheries Management

Advising for ESSM:
Advising for students in the legacy ESSM programs is now situated under AGLS Advising Center 7

Undergraduate Advising | Ann Pool
Graduate Advising | Amanda Ray

Department Resources

College of Ag and Life Sciences

Back to top