Projects

CONSERVATION OF MANURE NUTRIENTS AND ODORANT REDUCTION IN SWINE AND CATTLE CONFINEMENT FACILITIES Appropriated (D)   Accession Number: 409551

Publications

Remote Sensing Methods for Identifying Potential Emissions from Feedlot Surfaces - (Abstract) - (03-Aug-09)

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.

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

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.

EMI-Sensor Data to Identify Areas for Potential Emissions of Volatile Fatty Acids from Feedlot Surfaces - (Proceedings/Symposium)

Woodbury, B.L., Eigenberg, R.A., Varel, V.H., Spiehs, M.J. 2009. EMI-Sensor Data to Identify Areas for Potential Emissions of Volatile Fatty Acids from Feedlot Surfaces. In: Proceedings of the American Society of Agricultural & Biological Engineers. June 21-24, 2009. Reno, NV. ASABE Paper No. 96161. St. Joseph, Mich.:ASABE.

Feeding Distiller's Byproducts May Enhance Reduced Sulfur Emissions from Cattle Feedlots - (Abstract)

Miller, D.N., Varel, V.H., Woodbury, B.L., Spiehs, M.J. 2009. Feeding Distiller's Byproducts May Enhance Reduced Sulfur Emissions from Cattle Feedlots. ASA-CSSA-SSSA Annual Meeting, November 1-5, 2009, Pittsburgh, Pennsylvania. 2009 CDROM. Session 151 Poster 1.

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

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.

Prevalence and Level of Escherichia coli O157:H7 in Feces and on Hides of Feedlot Steers Fed Diets With or Without Wet Distillers Grains with Solubles - (Peer Reviewed Journal)

Wells, J., Shackelford, S.D., Berry, E.D., Kalchayanand, N., Guerini, M.N., Varel, V.H., Arthur, T.M., Bosilevac, J.M., Freetly, H.C., Wheeler, T.L., Ferrell, C.L., Koohmaraie, M. 2009. Prevalence and Level of Escherichia coli O157:H7 in Feces and on Hides of Feedlot Steers Fed Diets With or Without Wet Distillers Grains with Solubles. Journal of Food Protection 72(8):1624-1633.

Prevalence and Level of Escherichia coli O157:H7 in Feces and On Hides of Feedlot Steers Fed Diets With or Without Wet Distillers Grains With Solubles - (Abstract)

Wells, J., Shackelford, S.D., Berry, E.D., Kalchayanand, N., Varel, V.H., Arthur, T.M., Bosilevac, J.M., Freetly, H.C., Wheeler, T.L., Ferrell, C.L., Koohmaraie, M. 2009. Prevalence and Level of Escherichia coli O157:H7 in Feces and On Hides of Feedlot Steers Fed Diets With or Without Wet Distillers Grains With Solubles [abstract]. Microbial Ecology 57(3):583-584.

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)

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.

Effects of distillers grains on feedlot performance of crossbred steers - (Abstract)

Ferrell, C.L., Shackelford, S.D., Varel, V.H. 2008. Effects of distillers grains on feedlot performance of crossbred steers [abstract]. Journal of Animal Science. 86 (E-Supplement 2):583.

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)

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.

Cellulolytic Bacteria from the Rumen - (Research Notes) - (28-Jan-08)

Viability of zoonotic pathogens Escherichia coli and Salmonella in swine manure slurries with and without a urease inhibitor and thymol - (Peer Reviewed Journal)

Wells, J., Varel, V.H. 2008. Viability of zoonotic pathogens Escherichia coli and Salmonella in swine manure slurries with and without a urease inhibitor and thymol. Letters in Applied Microbiology 46:477-482.

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/Symposium)

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

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.

BEEF CATTLE - MANURE MANAGEMENT - (Book/Chapter)

Cole, N.A., Brown, M.S., Varel, V.H. 2007. Beef Cattle - Manure Management. In: Bell, A.W., Pond, W.G., editors. Encyclopedia of Animal Science. Taylor and Francis, 1(1):1-4.

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

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)

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.

EFFECTS OF ESSENTIAL OILS ON VIABILITY OF ESCHERICHIA COLI O157:H7 IN TREATED BEEF CATTLE MANURE SLURRIES AND ON PREVALENCE FROM TREATED FEEDLOT SURFACES - (Abstract)

Wells, J., Berry, E.D., Varel, V.H. 2006. Effects of essential oils on viability of Escherichia coli O157:H7 in treated beef cattle manure slurries and on prevalence from treated feedlot surfaces [abstract]. Journal of Animal Science 84(Suppl 1):356-357.

INCORPORATION OF THYMOL INTO CORNCOB GRANULES FOR REDUCTION OF ODOR AND PATHOGENS IN FEEDLOT CATTLE WASTE - (Peer Reviewed Journal)

Varel, V.H., Miller, D.N., Berry, E.D. 2006. Incorporation of thymol into corncob granules for reduction of odor and pathogens in feedlot cattle waste. Journal of Animal Science. 84(2):481-487.

EFFECTS OF COMMON FORAGE PHENOLIC ACIDS ON ESCHERICHIA COLI O157:H7 VIABILITY IN BOVINE FECES - (Peer Reviewed Journal)

Wells, J.E., Berry, E.D., Varel, V.H. 2005. Effects of common forage phenolic acids on Escherichia coli O157:H7 viability in bovine feces. Applied and Environmental Microbiology. 71(12)7974-7979.

VIABILITY OF SALMONELLA ENTERICA TYPHIMURIUM AND ESCHERICHIA COLI O157:H7 IN FINISHING SWINE MANURE SLURRIES WITH AND WITHOUT A UREASE INHIBITOR AND A PLANT ESSENTIAL OIL - (Abstract)

Wells, J., Varel, V.H. 2005. Viability of Salmonella enterica Typhimurium and Escherichia coli O157:H7 in finishing swine manure slurries with and without a urease inhibitor and a plant essential oil [abstract]. Journal of Animal Science. 83(Supplement 1):301-302.

PLANT OILS AND UREASE INHIBITORS AS SOLUTIONS FOR ENVIRONMENTAL ISSUES ASSOCIATED WITH CONFINED ANIMAL FEEDING OPERATIONS - (Abstract)

Varel, V.H., Wells, J. 2005. Plant oils and urease inhibitors as solutions for environmental issues associated with confined animal feeding operations. Proceedings of the 2005 Conference on Gastrointestinal Function. p. 28.

MICROBIAL ACTIVITIES AND FEEDLOT EMISIONS - (Abstract)

Miller, D.N., Berry, E.D., Varel, V.H. 2004. Microbial activities and feedlot emisions. Procedings of the International Annual Meetings of the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, October 31 - November 4, 2004, Seattle, WA, 2004 CDROM.

EUGENOL STIMULATES LACTATE ACCUMULATION YET INHIBITS VOLATILE FATTY ACID PRODUCTION AND ELIMINATES COLIFORM BACTERIA IN CATTLE AND SWINE WASTE - (Peer Reviewed Journal)

Varel, V.H., Miller, D.L. 2004. Eugenol stimulates lactate accumulation yet inhibits volatile fatty acid production and eliminates coliform bacteria in cattle and swine waste. Journal of Applied Microbiology. 97:1001-1005.

COMBINATION OF A UREASE INHIBITOR AND A PLANT ESSENTIAL OIL FOR CONTROL OF FECAL COLIFORMS AND EMISSIONS OF ODOR AND AMMONIA FROM CATTLE WASTE - (Abstract)

Varel, V.H., Wells, J., Miller, D.N. 2004. Combination of a urease inhibitor and a plant essential oil for control of fecal coliforms and emissions of odor and ammonia from cattle waste [abstract]. Journal of Animal Science 82(Suppl. 1):302.

EFFECT OF PLANT PHENOLICS ON ESCHERICHIA COLI O157:H7 SURVIVAL IN BOVINE FECES - (Abstract)

Wells, J.E., Berry, E.D., Miller, D.N., Varel, V.H. 2004. Effect of plant phenolics on Escherichia coli O157:H7 survival in bovine feces. In: Proceedings of the 104th General Meeting of the American Society for Microbiology, May 23-27, 2004, New Orleans, Louisiana. 2004 CDROM.

METABOLIC AND MICROBIAL RESPONSES IN WESTERN CROSSBRED AND MEISHAN GROWING PIGS FED A HIGH-FIBER DIET - (Peer Reviewed Journal)

Yen, J. T., Varel, V. H., Nienaber, J. A. 2004. Metabolic and microbial responses in western crossbred and Meishan growing pigs fed a high-fiber diet. Journal of Animal Science. 82:1740-1755.

LOWER DIGESTIVE TRACT MICROBIOLOGY - (Book/Chapter)

Varel, V.H., Wells, J. 2005. Lower digestive tract microbiology. In: Pond, W.G., Bell, A.W., editors. Encyclopedia of Animal Science. Marcel Dekker,Inc., New York, NY. p. 585-587.

DIFFERENCES IN FEEDLOT SURFACE MOISTURE AND MANURE CONTENT CONTROL ODOR COMPOUND PRODUCTION, DUST POTENTIAL, GREENHOUSE GAS EMISSION, AND NUTRIENT CONTENT - (Abstract)

MILLER, D.N., BERRY, E.D., VAREL, V.H. DIFFERENCES IN FEEDLOT SURFACE MOISTURE AND MANURE CONTENT CONTROL ODOR COMPOUND PRODUCTION, DUST POTENTIAL, GREENHOUSE GAS EMISSION, AND NUTRIENT CONTENT. CD-ROM. Denver, CO.: AMERICAN SOCIETY OF AGRONOMY, CROP SCIENCE SOCIETY OF AMERICA, AND SOIL SOCIETY OF AMERICA ANNUAL MEETING. 2003.

PLANT OILS THYMOL AND EUGENOL AFFECT CATTLE AND SWINE WASTES EMISSIONS DIFFERENTLY - (Peer Reviewed Journal)

Varel, V.H., Miller, D.N., Lindsay, A.D. 2004. Plant oils thymol and eugenol affect cattle and swine wastes emissions differently. Water Science and Technology 50(4):207-213.

GI TRACT: ANIMAL/MICROBIAL SYMBIOSIS - (Book/Chapter)

Wells, J., Varel, V.H. 2005. Gi tract: Animal/microbial symbiosis. In: Pond, W.G., Bell, A.W., editors. Encyclopedia of Animal Science. Marcel Dekker,Inc., New York, NY. p. 449-452.

SWINE MANURE COMPOSITION AFFECTS THE BIOCHEMICAL ORIGINS, COMPOSITION, AND ACCUMULATION OF ODOROUS COMPOUNDS - (Peer Reviewed Journal)

MILLER, D.N., VAREL, V.H. SWINE MANURE COMPOSITION AFFECTS THE BIOCHEMICAL ORIGINS, COMPOSITION, AND ACCUMULATION OF ODOROUS COMPOUNDS. JOURNAL OF ANIMAL SCIENCE. 2003. v. 81. p. 2131-2138.

SLOW-RELEASE THYME OIL GRANULES FOR CONTROL OF ODOR AND PATHOGENS IN FEEDLOT CATTLE WASTE - (Abstract)

VAREL, V.H., MILLER, D.N., BERRY, E.D. SLOW-RELEASE THYME OIL GRANULES FOR CONTROL OF ODOR AND PATHOGENS IN FEEDLOT CATTLE WASTE. JOURNAL OF ANIMAL SCIENCE. 2003. v. 81(SUPP.1): ABSTRACT P. 77.