Mary E. Drewnoski

Mary E. Drewnoski

Associate Professor
Beef Systems Specialist

Ph.D., North Carolina State University, Animal Science & Nutrition, 2009
M.S., North Carolina State University, Animal Science, 2006
B.S., Berea College, Agriculture and Natural Resources, 2004

Dr. Mary Drewnoski joined the Department of Animal Science in 2014 and currently serves as an Assistant Professor and Extension Beef Systems Specialist. She earned her B.S., in Agriculture and Natural Resources from Berea College (Ky.), before earning both her M.S., (Animal Science) and Ph.D., (Animal Science and Nutrition) from North Carolina State University. Prior to Nebraska, Dr. Drewnoski served as a postdoctoral research associate in feedlot nutrition at Iowa State University (2009-12) and as a assistant professor of beef nutrition at University of Idaho (2012-14).

Her research and extension program focus is on the utilization of crop residues and cover crop forage for backgrounding calves and feeding beef cows. Dr. Drewnoski also serves on an interdisciplinary team evaluating economical systems for integrated crop and livestock production in Nebraska.


Peer Reviewed Extension Publications

  • Drewnoski, M. E., B. E. Anderson, P. J. Kononoff, and M. E. Reynolds. 2019. Nitrates in Livestock Feeding. NebGuide G1779.
  • Drewnoski. M. 2019. Frequently Asked Questions about Grazing Corn Residue Fields with Excessive Downed Corn. BeefWatch Electronic Newsletter. November.
  • Drewnoski. M. and D. Redfearn. 2019. Annual Forage Options for July or August Planting. BeefWatch Electronic Newsletter. July
  • Drewnoski, M. E. and D. D. Redfearn. 2018. Nutrient Removal by Cows Grazing Corn Residue. CropWatch Electronic Newsletter. November.
  • Drewnoski, M. E. and D. Redfearn. 2018. Reducing Nitrate Concerns When Grazing Forage Cover Crops. CropWatch Electronic Newsletter. July.
  • Drewnoski, M. E. 2017. Wintering Growing Calves Using Corn Residue: The Value of Bypass Protein. BeefWatch Electronic Newsletter. October.
  • Drewnoski, M. E. 2017. Studies Show Minimal Soil Compaction with Winter Grazing. 2017. CropWatch Electronic Newsletter. October.
  • Drewnoski, M and D. Redfearn. 2015. Annual Cool-Season Forages for Late-fall or Early-Spring Double-Crop. NebGuide G2262.

Non-Peer-Reviewed Educational Publications


Proceeding papers


Research Reports

Refereed Journal Articles

Profile pic of Mary Drewnoski
Areas of Expertise
Beef Cattle
Ruminant Nutrition

Professional Highlights

2019-Present - Associate Professor, Beef Systems Extension Specialist, University of Nebraska-Lincoln
2014-2019 - Assistant Professor, Beef Systems Extension Specialist, University of Nebraska-Lincoln
2012-2014 - Assistant Professor, Beef Nutrition, University of Idaho
2009-2012 - Postdoctoral Research Associate, Feedlot Nutrition, Iowa State University