Education
- Ph.D.,
University of Kentucky, 1974
- M.S., University of Kentucky, 1972
- B.S., Iowa State University, 1969
Research Interests
- Swine systems
management
- Segregated
early weaning in swine
- Composting
livestock mortalities
Outreach Programs
- Ongoing
farm visits and consultations
- Represent the Southern Experiment Station in directing and hosting the
University of Minnesota Pork Conference
- Host field days at the Southern Experiment Station
Awards
Minnesota
Honorary State FFA Degree, 1992
Affiliations
Links
Southern
Research and Outreach Center
Selected Publications
- Refereed Articles -
Baidoo, S.K., Q.M. Yang, and R.D. Walker. 2003. Effects of phytase on apparent digestibility of organic phosphorus and nutrients in maize-soya bean meal based diets for sows. Anim. Feed Sci. Tech. 104:133-141.
Johnston, L.J., J.E. Pettigrew, S.K. Baidoo, G.C. Shurson, and R.D. Walker. 2003. Efficacy of sucrose and milk chocolate product and dried porcine solubles to increase feed intake and improve performance of lactating sows. J. Anim. Sci. 81:2475-2481.
Yang, H., J.E. Pettigrew, L.J. Johnston, G.C. Shurson, and R.D. Walker. 2000. Lactational and subsequent reproductive responses of lactating sows to dietary lysine (protein) concentration. J. Anim. Sci. 78:348-357.
Yang,
H., J.A. Kerber, J.E. Pettigrew, L.J. Johnston, and RD Walker. 1997.
Evaluation of milk chocolate product as a substitute for whey in pig
starter diets. J. Anim. Sci. 75:423.
Richert,
B.T., M.D. Tokach, R.D. Goodband, J.L. Nelssen, J.E. Pettigrew, R.D.
Walker, and L.J. Johnston. 1996. Valine requirement of the high producing
sow. J. Anim. Sci. 74:1307-1313.
Johnston,
L.J., J.E. Pettigrew, M.E. Wilson, R.D. Walker, and B. Crooker. 1995.
Influence of dietary molasses on reproductive performance of lactating
sows. University of Minnesota: Recent Advances of Swine Production and
Health. Vol. 5, p. 15.
Mankell,
K.O., K.A. Janni, R.D. Walker, ME Wilson, J.E. Pettigrew, L.D. Jacobson,
and W.F. Wilcke. 1995. Dust suppression in swine feed using soybean
oil. J. Anim. Sci. 73:981-985.
- Proceedings and Invited Lectures -
Koketsu, Y., L. Johnston, R. Walker, H. Yang, J. Pettigrew, and G. Dial. 1999. Benchmarking in swine herds. PigCHAMP publication. University of Minnesota. St. Paul. pp. 84-87.
Drum, S.,
R.D. Walker, M. Mellencamp, and W. Marsh. 1997. Do benefits from SEW
continue through finishing? 1997 Swine Day Proc. p 51-65. University
of Minnesota.
Drum,
S., R.D. Walker, W.E. Marsh, and M.A. Mellencamp, 1996. Effects of segregated
early weaning on growth performance of pigs from nursery to slaughter.
Conf. of Research Workers in Animal Diseases, Chicago, IL.
Walker,
R.D. 1995. Segregated early weaning and finishing pig performance. 1995
Swine Day Proc. p 2-14. University of Minnesota.
Pettigrew,
J.E., R.D. Walker, and M.E. White. 1995. The early weaned pig: The role
of age at weaning, health status and diet. Canadian Society of Animal
Science, 1995 Conf., Ottawa, Canada.
- Abstracts -
Anil, L., S.S. Anil, J. Deen, S.K. Baidoo, and R.D. Walker 2005. Evaluation of the effect of group size and structure of gestation housing on production performance and removal of sows in pens with electronic sow feeders (ESFs). J. Anim. Sci. Vol. 83, Suppl. 1 (Abstr.).
Anil, L., S.S. Anil, J. Deen, S.K. Baidoo, and R.D. Walker. 2005. Evaluation of the effect of group size and structure on welfare of gestating sows in pens with electronic sow feeders (ESFs). J. Anim. Sci. Vol. 83, Suppl. 1 (Abstr.).
Anil, S.S., L. Anil., J. Deen., S.K. Baidoo, and R.D. Walker. 2005. Analysis of the association between farrowing and lactation factors and sow removal. J. Anim. Sci. Vol. 83, Suppl. 1 (Abstr.).
Anil, S.S., L. Anil., J. Deen., S.K. Baidoo and R.D. Walker. 2005. Analysis of the association between farrowing and subsequent breeding performance with lactation feed intake. J. Anim. Sci. Vol. 83, Suppl. 1 (Abstr.).
Anil, L., J. Deen, S.S. Anil, S.K. Baidoo, and R.D. Walker. 2005. The effect of housing systems on sow longevity and performance – A comparison of stalls and pens with electronic sow feeders (ESF). J. Anim. Sci. Vol. 83, Suppl. 2 (Abstr.).
Walker, R.D., D. Goetz, and S. Baidoo. 2005. Farrowing performance of sows housed in gestation crates vs. pens containing electronic sow feeders. J. Anim. Sci. Vol. 83, Suppl. 2 (Abstr.).
Marubashi, T., T. Suzuki, H. Miyazaki, R.D. Walker, K.H. Choi, and Y. Koketsu. 1999. The effect of Bacillus subtilis C-3102 (Calsporin) intake on growth performance and micro-flora of pigs. J. Anim. Sci. Vol. 77, Suppl. 1, No. 55 (Abstr.).
Yang, H., J.E. Pettigrew, L.J. Johnston, G.C. Shurson, and R.D. Walker. 1999. Lysine requirement for maximal lactation and subsequent reproductive performance of multiparous sows. J. Anim. Sci. Vol. 77, Suppl. 1, No. 263 (Abstr.).
Johnston,
L.J., J.E. Pettigrew, and R.D. Walker. 1998. Effect of sucrose/milk
chocolate product (MCP) blend on feed intake and performance of lactating
sows. J. Anim. Sci. Vol. 76, Suppl. 2, No. 89 (Abstr.).
Augenstein,
M.L., L.J. Johnston, J.E. Pettigrew, R.D. Walker, and R. Rose. 1995.
Use of ethylamine in simple starter diets to improve utilization of
soybean meal by newly weaned pigs. J. Anim. Sci. 73, Suppl. 1, p. 71 (Abstr.).
Yang,
H., J.A. Kerber, J.E. Pettigrew, L.J. Johnston, and R.D. Walker. 1995.
Evaluation of milk chocolate product as a substitute for whey in pig
starter diets. J. Anim. Sci. 73, Suppl. 1, p. 76 (Abstr.).
Johnston,
L.J., J.E. Pettigrew, M.E. Wilson, R.D. Walker, and B.S. Crooker. 1994.
Influence of dietary molasses on reproductive performance of lactating
sows. J. Anim. Sci. Vol. 72, Suppl. 1:334 (Abstr.).
Mankell,
K.O., K.A. Janni, R.D. Walker, M.E. Wilson, J.E. Pettigrew, L.D. Jacobson,
and W.F. Wilcke. 1994. Dust suppression in swine feed using soybean
oil. J. Anim. Sci. Suppl. 1., Vol. 72, p. 42 (Abstr.).
Richert,
B.T., R.D. Goodband, M.D. Tokach, J.L. Nelssen, L.J. Johnston, R.D.
Walker, J.E. Pettigrew, and S.A. Blum. 1994. Determining the valine
requirement of high producing sows. J. Anim. Sci. Vol. 72(Suppl. 1)
p. 389 (Abstr.).
Walker,
R.D. and B.S. Wiseman. 1994. Growth performance of segregated early
weaned (SEW) pigs compared to their conventionally weaned littermates.
J. Anim. Sci. Vol. 72, Suppl. 1:377 (Abstr.).
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