Effect of out-wintering pad design on cow hoof health. K. O'Driscoll*1,2, L. Boyle1, P. French1, and A. Hanlon2, Moorepark Dairy Production Research Centre, Fermoy, Co. Cork, Ireland, 2University College Dublin, Dublin, Ireland.
Correlation between tarsal lesions on dairy cows housed in free-stalls and culling rate, somatic cell count, percent mature cows, and milk production by stall base. W. K. Fulwider*, T. Grandin, D. J. Garrick, T. E. Engle, W. D. Lamm, N. L. Dalsted, and B. E. Rollin, Colorado State University, Fort Collins.
Effect of body condition score at calving on production and reproduction performance in dairy herds of Argentina. J. Grigera*1, F. Busso2, F. Bargo1, and C. Corbellini2, 1Elanco Animal Health, ACBSCR, 2INTA Pergamino.
Ration sorting in freestall dairy herds. M. I. Endres* and L. A. Espejo, University of Minnesota, St. Paul.
The effect of breed and feeding a split ration to lactating hair sheep on ewe body temperature in the tropics. R. W. Godfrey*, M. C. Vinson, and R. C. Ketring, University of the Virgin Islands, Agricultural Experiment Station, St. Croix, US Virgin Islands.
Effects of heat stress on production, lipid metabolism and somatotropin variables in lactating cows. M. L Rhoads*1, R. P. Rhoads1, S. R. Sanders1, S. H. Carroll1, W. J. Weber2, B. A. Crooker2, R. J. Collier1, M. J. VanBaale1, and L. H. Baumgard1, 1University of Arizona, 2University of Minnesota, St. Paul.
Effect of encapsulated niacin on resistance to acute thermal stress in lactating Holstein cows. R. B. Zimbelman*, J Muumba, L. H. Hernandez, J. B. Wheelock, G. Shwartz, M. D. O'Brien, L. H. Baumgard, and R. J. Collier, University of Arizona.
Effect of level of production and intensive cooling in summer on productive and reproductive performance of high yielding dairy cows. I. Flamenbaum*1 and E. Ezra2, 1Ministry of Agriculture, Extension Service, Beit-Dagan, Israel, 2Israel Cattle Breeders Association, Caesarea, Israel.
Reducing freestall availability without limiting feed access during dry period does not affect subsequent milk yield. J. M. Velasco*, K. K. Fried, T. F. Gressley, E. D. Reid, T. C. Hausman, and G. E. Dahl, University of Illinois, Urbana.
Using ear canal temperature to predict vaginal temperature. B. H. Carter*, T. H. Friend, M. A. Tomaszewski, J. R. Fisher, and G. M. Bingham, Texas A&M University, College Station.
Future of pasture-based systems in the U.S. L. D. Muller, Pennsylvania State University, University Park.
Effects of N solubility on metabolisable protein value of grass silage. P. Huhtanen*1, M. Rinne2, and J. Nousiainen3, Cornell University, Ithaca, NY, 2MTT-Agrifood Research, Finland, 3Valio Ltd., Finland.
Ruminal metabolism of N labelled ammonium-N and grass silage soluble non-ammonia-N. S. Ahvenjarvi*1, A. Vanhatalo1, P. Huhtanen , and A. N. Hristov2, 1MTT Agrifood Research Finland, Jokioinen, Finland, 2University of Idaho, Moscow.
The aerobic stability of forage maize silage preserved with microbial inoculant with and without preservatives. J. K. Margerison*1, S. A. Hall2, and D. Wilde3, 1Massey University, Palmerston North, New Zealand, 2University of Plymouth, Plymouth, UK, 3Alltech Ltd, Stamford, Lincs, UK.
Effect of corn hybrid and processing on ruminal and intestinal digestion using the mobile bag technique. F. W. Harrelson*1, N. F. Meyer1, G. E. Erickson1, T. J. Klopfenstein1, and W. A. Fithian2, 1University of Nebraska, Lincoln, 2Golden Harvest Seeds, Inc., Waterloo, NE.
Ruminal L-dopa degradability and in vitro fermentation kinetics of Mucuna pruriens and soybean meal treated with or without L-dopa. S. K. Chikagwa-Malunga*, A. T. Adesogan, S. C. Kim, N. J. Szabo, R. C. Littell, and N. Krueger, University of Florida, Gainesville.
Study internal molecular-structural changes of flaxseeds affected by dry roasting at various conditions in relation to rumen degradation kinetics of dairy cattle. K. Doiron* and P. Yu, University of Saskatchewan, Saskatoon, SK, Canada.
Microbial characteristics, microbial nitrogen flow, and urinary purine derivative excretion in steers fed at two levels of intake. G. I. Crawford*, M. K. Luebbe, J. R. Benton, T. J. Klopfenstein, and G. E. Erickson, University of Nebraska, Lincoln.
Ruminant Nutrition Nitrogen Metabolism/Immunology Chair: Chad Mueller, Oregon State University 217 B