Meet Dr. Ryon S. Walker

Laura Haley  |  9/13/2016 5:36:43 PM

Walker PicjpgDr. Ryon S. Walker is an assistant professor and researcher at the Hill Farm Research Station in Homer. He is also the beef coordinator in the Northwest Region and offers both the Master Cattleman program and an Artificial Insemination course each year. Dr. Walker can be reached at rswalker@agcenter.lsu.edu or via phone at 318.927.2578 Ext. 205.

Education/Training

Professional Experience

08/2010-present: Assistant Professor, Beef Cattle Research Project Leader, Louisiana State University Agricultural Center, Hill Farm Research Station

08/2007-07/2010: Associate Extension Professor, Beef Cattle Extension Specialist, University of Minnesota, North Central Research and Outreach Center

08/2004-07/2007: Assistant Extension Professor, Beef Cattle Extension Specialist, University of Minnesota, North Central Research and Outreach Center

09/2001-08/2004: Ph.D Graduate Research Associate, Colorado State University

01/1998-08/2000: M.Agr. Graduate Research Assistant, Texas A&M University

09/1995-12/1997: Undergraduate Research Assistant, Texas A&M University

Awards/Grants

Walker, R.S., R.M. Martin. 2013. Performance and economic impact of feeding baleage to

backgrounded cattle. Louisiana Beef Industry Council Beef Promotion and Research Program.

Walker, R. S., J. Miller, and C. Navarre. 2011. Mixed Cooperia control and performance of

weaned stocker calves on late spring/summer grass. Boehringer Ingelheim Vetmedica.

Cox, R. and R. S. Walker. 2010. Evaluation of Fatty Acid Composition, Retail Shelf Stability,

and Consumer Acceptance of Beef Enhanced with Natural Antioxidants from Forage-

Finished Cattle. Grant-In-Aid Research, Artistry, and Scholarship from Office of Vice President for Research, University of Minnesota.

Walker, R. S. 2009. Northwest Minnesota Beef Improvement Program. Minnesota

Department of Agriculture, Tru-Test Inc., and For-Most Livestock Equipment.

Walker, R. S., R. Mathison, T. Salzer, B. Staskivige, and P. R. Peterson. 2008. Methods to Establish Grazing of Annual Forages for Beef Cows on Winter Feeding Areas. Minnesota Department of Agriculture.

Walker, R. S., A. DiCostanzo. 2008. Alternative and Pasture Based Livestock Operations.

MN Agriculture Experiment Station.

Mathison, R. and R. S. Walker. 2008. Evaluating Forage Quality of Fall Grazing Systems

Comparing Stockpiled vs Windrowed Annual Forages. Midwest Forage Association.

DiCostanzo, A., R. S. Walker, G. Crawford, L. Weddle-Schott, and B. Funnell. 2008.

Managing Feed Intake in Beef Cattle Herds to Reduce TB Transmission Risk.

Minnesota Rapid Agriculture Response Fund.

DiCostanzo, A., L. Weddle-Schott, G. Crawford, and R. S. Walker. 2008. Assessment of the

Value of Spayed Heifers for Marketing. Minnesota Rapid Agriculture Response Fund.

Walker, R. S. and S. Wells. 2008. Education and Outreach on Bovine Tuberculosis

Management and Eradication. Minnesota Rapid Agriculture Response Fund.

Walker, R. S., L. Weddle-Schott, G. Crawford, and A. DiCostanzo. 2008. Coordinate and

Implement Education & Outreach on Best Management Practices for Reducing the Risk

of Bovine TB. Minnesota Department of Agriculture.

Publications/Presentations/Patents

Refereed Journal Articles

Anderson, J.E., R.S. Walker, K. Harborth, M. Garcia, and C.C. Williams. 2016. Effects of weaning method and preconditioning period on calf performance, haptoglobin concentrations, feedlot health, and performance, and carcass traits. Prof. Anim. Sci. (Accepted).

Gentry, G., R.S. Walker, and L. Gentry. 2016. Impacts of incorporation of follicle stimulating hormone into an estrous synchronization protocol for timed artificial insemination of crossbred beef cattle. Anim. Reprod. Sci. doi:10.1016/j.an.reprosci.2016.02.021.

Martin, R.M., R.S. Walker, M.T. Kearney, and C.C. Williams. 2015. Effects of feeding baleage to beef calves on performance, rumen fermentation, and metabolic response during the fall backgrounding period. Prof. Anim. Sci. 31:324-332.

Walker, R.S., R.M. Martin, and B. Buttrey. 2015. Effects of residual feed intake and dam

body weight on replacement heifer intake, efficiency, performance, and metabolic response. J. Anim. Sci. 93:3602-3612.

Pitman, W.D., Walker, R.S., G. Scaglia, B. Buckley, M.W. Alison, K.J. Han, J. Gurie, G. Gentry. 2015. Calf response to summer legumes as a creep grazing option in

Bermudagrass Pastures. J. Agric. Sci. Vol 7, No 8:8-17.

Walker, R.S., D. LaMay, and B. Buttrey. 2015. Evaluating the effects of late gestation supplementation on timed-artificial insemination pregnancy rates and body composition in beef cattle. Prof. Anim. Sci. 31:255-263.

Walker, R. S., R. M. Martin, G. T. Gentry, and L. R. Gentry. 2015. Impact of cow size on dry matter intake, residual feed intake, metabolic response, and cow performance. J. Anim. Sci. 93:672-684.

Walker, R. S., B. Buttrey, J. Gurie, and G. T. Gentry. 2014. Evaluating heat detector patch response to determine gonadotropin-releasing hormone use at timed artificial insemination on pregnancy rates in beef cattle. Prof. Anim. Sci. 30:613-619.

Walker, R.S., J.E. Miller, C.J. Monlezun, D. LaMay, C. Navarre, D. Ensley. 2013. Gastrointestinal nematode infection and performance of weaned stocker calves in response to anthelmintic control strategies. Vet. Parisitology 197:152-159.

Walker, R.S., D. LaMay, J.R. Davis, and C.A. Bandyk. 2013. Case Study: Method of feeding a liquid protein supplement with low- to medium quality hay impacts hay waste and cow performance. Prof. Anim. Sci. 29:552-558.

Lamb, G.C., C.R. Dahlen, K. A. Vonnehamme, G. R. Hansen, J. D. Arseneau, G. A. Perry, R.S. Walker, J. Clement, J. D. Arthington. 2008. Influence of a CIDR Prior to Bull-Breeding on Pregnancy Rates and Subsequent Calving Distribution. Anim. Reprod. Sci. 108:269.

Conference Proceedings

Walker, R.S. 2014. Effect of cow size on offspring feed intake and efficiency. In Proc.

University of Florida Beef Cattle Short Course, p. 51-57.

Kelzer, J.M., R.S. Walker, R.B. Cox, S.L. Bird, and R.D. Mathison. 2011. Evaluation of annual

ryegrass (Lolium multiflorum) in two fall grazing systems on forage quality and stocker calf performance in a forage-based finishing system in northern Minnesota. Proceedings, U of M Beef Cow/Calf Conference – BR-1101.

Mathison, R.D. and R.S. Walker. 2011. Grazing management of annual ryegrass in mixture with

turnips or rape. Proceedings, U of M Beef Cow/Calf Conference – BR-1102.

Popular Press Articles

Holmes, J. and R.S. Walker. 2015. Body Condition Scoring System (BCS) for Beef Cattle. Fact

Sheet. LSU AgCenter Communications. http://

Walker, R.S. 2015. The Perfect Cow – Part 2. The LA Cattlemen Magazine, Vol 48, No 8. Pg.

Walker, R.S. 2015. The Perfect Cow – Part 1. The LA Cattlemen Magazine, Vol 48, No 7. Pg.

11.

Walker, R.S. 2015. Impact of Cow Size on Efficiency. Louisiana Agriculture Magazine. Vol 58.

pg. 24-25.

Walker, R.S. 2015. Heifer Development – Target Breeding Weight. NE LA Pasture to Market

Newsletter, Jan. – Feb: http://cms.lsuagcenter.net/MCMS/RelatedFiles/%7BB7BCAD5A-46D3-4645-9B31-0717B0553422%7D/Mar_Apr_2015.pdf

Martin, R.M. and R.S. Walker. 2014. Performance of feeding baleage to backgrounded cattle.

The LA Cattlemen Magazine. Vol 47, p. 34.

Walker, R.S. 2012. Supplements may increase cow fertility – radio interview with LSU

AgCenter. http://www.lsuagcenter.com/NR/rdonlyres/E41D06CC-695A-437D-9F82-8FB366DD7059/89156/CattleSupplementation.mp3

Walker, R.S. 2011. Cow size study examines raising more efficienct cattle – radio interview

with LSU AgCenter. http://www.lsuagcenter.com/NR/rdonlyres/07139EF1-2EED-4B15-8A44-34EFEDBF0023/81823/CowSizeStudy.mp3

Walker, R.S. 2011. Study looks at method of feeding protein supplement to cattle – radio

interview with LSU AgCenter. http://www.lsuagcenter.com/NR/rdonlyres/5EFBAD20-11F0-449D-A6F7-F37975BB61CF/81815/ProteinSupplementCattle.mp3

Walker, R.S. 2010. Impacts of body condition on cow production. MN Farm Guide: Sept. 8,

2010. http://www.minnesotafarmguide.com/news/livestock/impacts-of-body-condition-on-cow- production/article_8d1b63ad-00b9-5c80-9bda-bd1a17fd068a.html

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