Publications (Clicking on the reprint icon will take you to the publication reprint.)

Ammonia emissions from feedlot surface of beef deep-bedded monoslope facilities - (Proceedings)

Spiehs, M.J., Woodbury, B.L., Doran, B.E., Eigenberg, R.A., Kohl, K.D. 2010. Ammonia emissions from feedlot surface of beef deep-bedded monoslope facilities. In: Proceedings of the American Society of Agricultural and Biological Engineers. International Symposium on Air Quality and Manure Management for Agriculture. September 13-16, 2010, Dallas, Texas. 2010 CDROM.

Long term effects of annual additions of animal manure on soil chemical, physical, and biological properties in the Great Plains - (Proceedings)

Spiehs, M.J., Woodbury, B.L., Tarkalson, D.D., Wienhold, B.J., Eigenberg, R.A. 2010. Long term effects of annual additions of animal manure on soil chemical, physical, and biological properties in the Great Plains. 2010. In: Proceedings of the American Society of Agricultural and Biological Engineers. International Symposium on Air Quality and Manure Management for Agriculture, September 13-16, 2010, Dallas, Texas. 2010 CDROM.

Effect of Wind Tunnel Air Velocity on VOC Flux from Standard Solutions and CAFO Manure/Wastewater - (Peer Reviewed Journal)

Parker, D.B., Caraway, E.A., Rhoades, M.B., Cole, N.A., Todd, R.W., Casey, K.D. 2010. Effect of Wind Tunnel Air Velocity on VOC Flux from Standard Solutions and CAFO Manure/Wastewater. Transactions of the ASABE. 53(3):831-845.

Odor Production and Escherichia coli Concentrations in Manure Slurries of Feedlot Steers Fed 0 or 40% Corn Wet Distillers Grains with Solubles - (Abstract Only)

Varel, V.H., Wells, J., Berry, E.D., Miller, D.N. 2010. Odor Production and Escherichia coli Concentrations in Manure Slurries of Feedlot Steers Fed 0 or 40% Corn Wet Distillers Grains with Solubles. In: Proceedings of the 110th General Meeting of the American Society for Microbiology, May 23-27, 2010, San Diego, CA. 2010 CDROM.

Manure odor potential and Escherichia coli concentrations in manure slurries of feedlot steers fed 40% corn wet distillers grains     - (Peer Reviewed Journal)

Varel, V.H., Wells, J., Berry, E.D., Miller, D.N. 2010. Manure odor potential and Escherichia coli concentrations in manure slurries of feedlot steers fed 40% corn wet distillers grains. Journal of Environmental Quality. 39(4):1498-1506.

Hoops and Mono-Slopes: What We Have Learned About Management and Performance - (Proceedings)

Doran, B., Euken, R., Spiehs, M.J. 2010. Hoops and Mono-Slopes: What We Have Learned About Management and Performance. In: Feedlot Forum 2010, Iowa Beef Center at Iowa State University, Dec. 8, 2009 and Feb. 11, 2010, Ames, IA. pp. 8-16.

Nutrient Excretion and Odorant Production in Manure from Cattle Fed Corn Wet Distillers Grains With Solubles     - (Peer Reviewed Journal)

Spiehs, M.J., Varel, V.H. 2009. Nutrient Excretion and Odorant Production in Manure from Cattle Fed Corn Wet Distillers Grains With Solubles. Journal of Animal Science 87:2977-2984. Online. Journal of Animal Science doi:10.2527/jas.2008-1584.

Ammonia Emissions From Feedlot Surface of Beef Deep-Bedded Monoslope Facilities - (Abstract Only)

Spiehs, M.J., Woodbury, B.L., Eigenberg, R.A., Doran, B.E., Kohl, K.D. 2009. Ammonia Emissions From Feedlot Surface of Beef Deep-Bedded Monoslope Facilities. [abstract] In: Proceedings of 238th American Chemistry Society National Meeting, Aug. 16-20, 2009, Washington, DC. Abstract 62, p. 101.

Diet Effect on the Type and Spatial Distribution of Odorous Emissions from Beef Cattle - (Abstract Only)

Woodbury, B.L., Eigenberg, R.A., Varel, V.H., Spiehs, M.J. 2009. Diet Effect on the Type and Spatial Distribution of Odorous Emissions from Beef Cattle. [abstract] In: Proceedings of 238th American Chemistry Society National Meeting, Aug. 16-20, 2009, Washington, DC. Abstract 65, p. 101.

Methane Emission by Goats Consuming Condensed Tannin-containing Forage at Different Frequencies - (Abstract Only)

Puchala, R., Animut, G., Goetsch, A.L., Sahlu, T., Varel, V.H., Wells, J. 2009. Methane Emission by Goats Consuming Condensed Tannin-containing Forage at Different Frequencies [abstract]. Journal of Animal Science 87 (E-Supplement 2):483.

The Value of Manure in Feedlot Operations - (Other)

Spiehs, M.J. 2009. The Value of Manure in Feedlot Operations. University of Minnesota Special Publication. In: Beef Cattle Program Proceedings, Research and Extension Reports, 2009 CDROM.

Odorant production and persistence of Escherichia coli in manure slurries from cattle fed zero, twenty, forty, or sixty percent wet distillers grains with solubles - (Peer Reviewed Journal)

Varel, V.H., Wells, J., Berry, E.D., Spiehs, M.J., Miller, D.N., Ferrell, C.L., Shackelford, S.D., Koohmaraie, M. 2008. Odorant production and persistence of Escherichia coli in manure slurries from cattle fed zero, twenty, forty, or sixty percent wet distillers grains with solubles. Journal of Animal Science 86:3617-3627.

Ruminal Methane Emissions by Goats Consuming Dry Hay of Condensed Tannin-Containing Lespedeza With or Without Polyethylene Glycol, Alfalfa, or Sorghum-Sudangrass - (Abstract Only)

Puchala, R., Animut, G., Goetsch, A.L., Patra, A.K., Sahlu, T., Varel, V.H., Wells, J. 2008. Ruminal Methane Emissions by Goats Consuming Dry Hay of Condensed Tannin-Containing Lespedeza With or Without Polyethylene Glycol, Alfalfa, or Sorghum-Sudangrass [abstract]. In: Proceedings of 9th International Conference on Goats, Aug. 31 - Sept. 5, 2008, Queretaro, Mexico. Abstract 73, pp. 98-99.

Odorant production and persistence of generic E. coli in manure slurries from cattle fed 0, 20, 40, and 60% wet distillers grains with solubles (WDGS). - (Abstract Only)

Varel, V.H., Wells, J., Berry, E.D., Spiehs, M.J., Miller, D.N., Ferrell, C.L., Shackelford, S.D., Koohmaraie, M. 2008. Odorant production and persistence of generic E. coli in manure slurries from cattle fed 0, 20, 40, and 60% wet distillers grains with solubles (WDGS)[abstract]. Journal of Animal Science 86(E-Suppl. 2)/Journal of Dairy Science 91(E-Suppl. 1):325.

Heat production and efficiency of energy utilization in finishing steers fed diets containing wet distillers grains with solubles (WDGS) - (Abstract Only)

Spiehs, M.J., Ferrell, C.L., Nienaber, J.A., Brown Brandl, T.M., Shackelford, S.D. 2008. Heat production and efficiency of energy utilization in finishing steers fed diets containing wet distillers grains with solubles (WDGS)[abstract]. Journal of Animal Science 86(E-Suppl. 2)/Journal of Dairy Science 91(E-Suppl. 1):583.

Cellulolytic Bacteria from the Rumen - (Research Notes)

(28-Jan-08)

Methane emission by goats consuming diets with different levels of condensed tannins from lespedeza - (Peer Reviewed Journal)

Animut, G., Puchala, R., Goetsch, A.L., Patra, A.K., Sahlu, T., Varel, V.H., Wells, J. 2008. Methane emission by goats consuming diets with different levels of condensed tannins from lespedeza. Animal Feed Science and Technology 144:212-227.

Methane emission by goats consuming different sources of condensed tannins - (Peer Reviewed Journal)

Animut, G., Puchala, R., Goetsch, A.L., Patra, A.K., Sahlu, T., Varel, V.H., Wells, J. 2008. Methane emission by goats consuming different sources of condensed tannins. Animal Feed Science and Technology 144:228-241.

Effect of N-(n-butyl) Phosphoric Triamide (NPBT) and a Linalool or Pine Oil Extract on Urea Concentration, Odorants, and Coliform Bacteria in Cattle Feedlot Manure - (Proceedings)

Varel, V.H., Wells, J., Berry, E.D. 2007. Effect of N-(n-butyl) Phosphoric Triamide (NPBT) and a Linalool or Pine Oil Extract on Urea Concentration, Odorants, and Coliform Bacteria in Cattle Feedlot Manure. In CDRom Proceedings: American Society of Agri Engineers Special Meetings, Sept. 15-19, 2007, Broomfield, CO. CDRom 701P0907cd.

COMBINATION OF A UREASE INHIBITOR AND A PLANT ESSENTIAL OIL TO CONTROL COLIFORM BACTERIA, ODOUR PRODUCTION, AND AMMONIA LOSS FROM CATTLE WASTE - (Peer Reviewed Journal)

Varel, V.H., Wells, J., Miller, D.N. 2007. Combination of a urease inhibitor and a plant essential oil to control coliform bacteria, odour production, and ammonia loss from cattle waste. Journal of Applied Microbiology 102:472-477. doi:10.1111/j.1365-2672.2006.03120.x

THE INFLUENCE OF OSCILLATING DIETARY PROTEIN CONCENTRATIONS ON FINISHING CATTLE. I. FEEDLOT PERFORMANCE AND ODOROUS COMPOUND PRODUCTION - (Peer Reviewed Journal)

Archibeque, S.L., Miller, D.N., Freetly, H.C., Berry, E.D., Ferrell, C.L. 2007. The influence of oscillating dietary protein concentrations on finishing cattle. I. Feedlot performance and odorous compound production. Journal of Animal Science. 85(6):1487-1495.

THE INFLUENCE OF OSCILLATING DIETARY PROTEIN CONCENTRATIONS ON FINISHING CATTLE. II. NUTRIENT RETENTION AND AMMONIA EMISSIONS - (Peer Reviewed Journal)

Archibeque, S.L., Freetly, H.C., Cole, N.A., Ferrell, C.L. 2007. The influence of oscillating dietary protein concentrations on finishing cattle. II. Nutrient retention and ammonia emissions. Journal of Animal Science. 85(6):1496-1503.

INFLUENCE OF THYMOL AND A UREASE INHIBITOR ON COLIFORM BACTERIA, ODOR, UREA, AND METHANE FROM A SWINE PRODUCTION MANURE PIT - (Peer Reviewed Journal)

Varel, V.H., Wells, J. 2007. Influence of thymol and a urease inhibitor on coliform bacteria, odor, urea, and methane from a swine production manure pit. Journal of Environmental Quality 36(3):773-779.

NET PORTAL AND HEPATIC FLUX OF NUTRIENTS IN GROWING WETHERS FED HIGH CONCENTRATE DIETS WITH OSCILLATING PROTEIN CONCENTRATIONS - (Peer Reviewed Journal)

Archibeque, S.L., Freetly, H.C., Ferrell, C.L. 2007. Net portal and hepatic flux of nutrients in growing wethers fed high-concentrate diets with oscillating protein concentrations. Journal of Animal Science. 85(4):997-1005.

INFLUENCE OF GENOTYPE AND DIET ON STEER PERFORMANCE, MANURE ODOR, AND CARRIAGE OF PATHOGENIC AND OTHER FECAL BACTERIA. III. ODOROUS COMPOUND PRODUCTION - (Peer Reviewed Journal)

Miller, D.N., Berry, E.D., Wells, J.E., Ferrell, C.L., Archibeque, S.L., Freetly, H.C. 2006. Influence of genotype and diet on steer performance, manure odor, and carriage of pathogenic and other fecal bacteria. III. Odorous compound production. Journal of Animal Science. 84:2533-2545.

EFFECTS OF FEEDING STEAM-ROLLED CORN IN LIEU OF DRY-ROLLED CORN ON THE ODOR OF FINISHING BEEF STEER MANURE - (Abstract Only)

Archibeque, S.L., Miller, D.N., Parker, D.B., Freetly, H.C., Ferrell, C.L. 2006. Effects of feeding steam-rolled corn in lieu of dry-rolled corn on the odor of finishing beef steer manure [abstract]. Journal of Animal Science 84(Suppl. 1):154-155.

METHANE EMISSION BY GOATS CONSUMING DIETS WITH DIFFERENT LEVELS OF CONDENSED TANNIN-CONTAINING LESPEDEZA AND SORGHUM-SUDANGRASS - (Abstract Only)

Animut, G., Puchala, R., Goetsch, A., Sahlu, T., Detweiler, G., Patra, A., Varel, V., Wells, J. 2006. Methane emission by goats consuming diets with different levels of condensed tannin-containing lespedeza and sorghum-sudangrass [abstract]. Journal of Animal Science 84(Suppl. 1):26.

INFLUENCE OF THYMOL ON COLIFORM BACTERIA, VFA, AND METHANE PRODUCTION FROM PULL-PLUG SWINE MANURE PITS - (Abstract Only)

Varel, V.H., Wells, J. 2006. Influence of thymol on coliform bacteria, VFA, and methane production from pull-plug swine manure pits [abstract]. Journal of Animal Science 84(Suppl. 1):292-293.