Area of Focus

Integrated Forage, Crop, and Beef Systems

Research Interests

• Develop management, production, and utilization strategies for annual forages used as cover crops
• Evaluate the influence of crop residue management systems on cover crop establishment
• Create unique crop residue management systems that facilitate use of cover crops

Extension Interests

• Enhance the use of crop residues and cover crops into existing beef production systems
• Implement economical crop residue harvest and grazing methods

Journal Articles

• Drewnoski, M., J. Parsons, H. Blanco, D. Redfearn, K. Hales, J. MacDonald. 2018. Can cover crops pull double duty: Conservation and profitable forage production in the Midwestern US? Journal of Animal Science. doi:10.1093/jas/sky026/4904372
• Schmer, M., R. Brown, V. Jin, R. Mitchell, and D. Redfearn. 2017. Corn residue utilization by livestock in the USA. Agriculture and Environmental Letters.
• Redfearn, D., J. Parsons, and M. Drewnoski. 2016. Multidisciplinary research and extension team development and evolution: Processes, outcomes, and strategies. Agriculture and Environmental Letters.
• Scasta, J. D., D.M. Engle, S.D. Fuhlendorf, D.D. Redfearn, and T.G. Bidwell. 2015. Meta-analysis of exotic forages as invasive plants in complex multi-functioning landscapes. Invasive Plant Science and Management 8:292-306.
• Bidwell, T., D. Redfearn, and B. Reavis. 2013. Native hay meadow management. Oklahoma Cooperative Extension Service, Oklahoma State University Extension Facts, NREM-2891.
• Redfearn, D. and J. Edwards. 2013. Spring-planted oat for grazing or hay production. Oklahoma Cooperative Extension Service, Oklahoma State University Extension Facts, PSS-2160.
• Wyatt, W.E., B.C. Venuto, J.M. Gillespie, D.C. Blouin, and D.D. Redfearn. 2012. Effects of year-round stocking rates and stocking methods on performance of cow-calf pairs grazing dallisgrass-common bermudagrass pastures overseeded with annual ryegrass. Professional Animal Scientist 28:417-432.
• Nelson, C.J., D.D. Redfearn, and J. H. Cherney. 2012. Forage harvest management. Chapter 4. In C.J. Nelson (ed.) Conservation Outcomes from Pastureland and Hayland Practices:  Assessment, Recommendations, and Knowledge Gaps. Allen Press, Lawrence, KS.
• Redfearn, D.D. 2012. Assessing drought damage in perennial grass pastures. Oklahoma Cooperative Extension Service, Oklahoma State University Extension Facts, PSS-2593.
• Redfearn, D.D. 2012. Pasture recovery following drought. Oklahoma Cooperative Extension Service, Oklahoma State University Extension Facts, PSS-2592.
• Wyatt, W.E., B.C. Venuto, J.M. Gillespie, D.C. Blouin, and D.D. Redfearn. 2012. Effects of year-round stocking rates and stocking methods on performance of cow-calf pairs grazing dallisgrass-common bermudagrass pastures overseeded with annual ryegrass. Professional Animal Scientist 28:417-432.
• Redfearn, D., and C. Rice. 2011. Bermudagrass pasture management. Oklahoma Cooperative Extension Service, Oklahoma State University Extension Facts, PSS-2591.
• Redfearn, D. 2010. Fertilizing cool-season grasses. In B. Arnall and D. Redfearn (ed.) Oklahoma Forage and Pasture Fertility Handbook. Oklahoma Cooperative Extension Service (E-1021).
• Redfearn, D. 2010. Fertilizing warm-season-season grasses. In B. Arnall and D. Redfearn (ed.) Oklahoma Forage and Pasture Fertility Handbook. Oklahoma Cooperative Extension Service (E-1021).
• Redfearn, D. 2010. Hay production and grazing. In B. Arnall and D. Redfearn (ed.) Oklahoma Forage and Pasture Fertility Handbook. Oklahoma Cooperative Extension Service (E-1021).
• Redfearn, D. 2010. Legume fertility.  In B. Arnall and D. Redfearn (ed.) Oklahoma Forage and Pasture Fertility Handbook. Oklahoma Cooperative Extension Service (E-1021).
• Redfearn, D., B. Arnall, H. Zhang, and C. Rice. 2010. Fertilizing bermudagrass hay and pasture.  Oklahoma Cooperative Extension Service, Oklahoma State University Extension Facts, PSS-2263.
• Edwards, J., J. Warren, and D. Redfearn. 2009. Sod-seeding small grains into bermudagrass pasture. Oklahoma Cooperative Extension Service, Oklahoma State University Extension Facts, PSS-3035.
• Redfearn, D. 2009. Realistic expectations for switchgrass in Oklahoma. p. 6-7. In D. Redfearn and J.L. Caddel (ed.) Switchgrass Production Guide for Oklahoma. Oklahoma Cooperative Extension Service (E-1012).
• Redfearn, D. 2009. Stand establishment. p. 8-15. In D. Redfearn and J.L. Caddel (ed.) Switchgrass Production Guide for Oklahoma. Oklahoma Cooperative Extension Service (E-1012).
• Santillano-Cazares, J., A.A. Hopkins, C.L. Goad, D.D. Redfearn, and J.L. Caddel. 2008. Winter grazing can be beneficial to tall fescue seed production in Oklahoma. Online. Forage and Grazinglands doi:10.1094/FG-2008-1007-01-RS.
• Philipp, D., K.J. Moore, J.F. Pedersen, R.J. Grant, D.D. Redfearn, and R.B. Mitchell. 2007. Ensilage performance of sorghum hybrids varying in extractable sugars. Biomass and Bioenergy 31 (7):492-496.

Book Chapters

• Redfearn, D.D., and C.J. Nelson. 2018. Grasses for Southern Areas. pp. 103-115. In: M. Collins et al., editors, Forages: An introduction to grassland agriculture. Volume I, 7th edition, Wiley/Blackwell Publishing.
• Nelson, C.J., D.D. Redfearn, and J. H. Cherney. 2012. Forage harvest management. Chapter 4. In C.J. Nelson (ed.) Conservation Outcomes from Pastureland and Hayland Practices: Assessment, Recommendations, and Knowledge Gaps. Allen Press, Lawrence, KS.
• Berdahl, J.D., and D.D. Redfearn. 2007. Grasses for arid and semi-arid areas. p. 221-244. In R.F Barnes, C.J. Nelson, M. Collins, and K.J. Moore (ed.) Forages: The Science of Grassland Agriculture, 6th edition, Volume II, Iowa State University Press, Ames, IA.