Projects

Minimizing the Environmental Impact of Livestock Manures Using Integrated Management Regimens Appropriated (D)   Accession Number: 409412

Air Quality: Odor, Dust, and Gaseous Emissions from Concentrated Animal Feeding Operations in the Southern Great Plains Reimbursable (R)   Accession Number: 411193

Ammonia and Methane Emissions in Beef Cattle Feedyards: Federal Air Quality Initiative Reimbursable (R)   Accession Number: 415056

Publications

Continuously measured annual ammonia emissions from Southern High Plains beef cattle feedyards - (Abstract)

Todd, R.W., Cole, N.A., Parker, D.B., Casey, K.D. 2008. Continuously measured annual ammonia emissions from Southern High Plains beef cattle feedyards [abstract]. 2008 Joint Meeting of American Society of Agronomy, Soil Science Society of America, and Crop Science Society of America, October 5-9, 2008, Houston, Texas. Paper No. 533-10. 2008 CDROM.

Ammonia concentration and modeled emission rates from a beef cattle feedyard - (Proceedings/Symposium)

Rhoades, M., Auvermann, B., Cole, N.A., Todd, R.W., Parker, D., Caraway, E., Shuster, G., Spears, J. 2008. Ammonia concentration and modeled emission rates from a beef cattle feedyard. In: Proceedings of 2008 Annual International Meeting of the American Society of Agricultural and Biological Engineers International, June 29-July 2, 2008, Providence, Rhode Island. Meeting Presentation Paper Number 084445.

Effect of wind tunnel air velocity on VOC flux rates from CAFO manure and wastewater - (Proceedings/Symposium)

Parker, D., Caraway, E., Rhoades, M., Donnell, C., Spears, J., Cole, N.A., Todd, R.W., Casey, K.D. Effect of wind tunnel air velocity on VOC flux rates from CAFO manure and wastewater. In: Proceedings of 2008 Annual International Meeting of the American Society of Agricultural and BIological Engineers International, June 29-July 2, 2008, Providence, Rhode Island. Meeting Presentation Paper Number 083897.

Ammonia emissions from a beef cattle feedyard on the Southern High Plains - (Peer Reviewed Journal)

Todd, R.W., Cole, N.A., Clark, R.N., Flesch, T.K., Harper, L.A., Baek, B. 2008. Ammonia emissions from a beef cattle feedyard on the Southern High Plains. Atmospheric Environment. 42:6797-6805. [doi:10.1016/j.atmosenv.2008.05.013]

Soil nitrogen distribution and deposition on shortgrass prairie adjacent to a beef cattle feedyard - (Peer Reviewed Journal)

Todd, R.W., Cole, N.A., Clark, R.N., Rice, W.C. 2008. Soil nitrogen distribution and deposition on shortgrass prairie adjacent to a beef cattle feedyard. Biology and Fertility of Soils. 44:1099-1102. [DOI 10.1007/s00374-008-0286-2]

Challenges in using flux chambers to measure ammonia and VOC emissions from open feedlot pen surfaces and retention ponds - (Abstract)

Cole, N.A., Todd, R.W., Parker, D.B., Rhoades, M.B., Caraway, E. 2008. Challenges in using flux chambers to measure ammonia and VOC emissions from open feedlot pen surfaces and retention ponds [abstract]. Abstracts of American Dairy Science Association and American Society of Animal Science Joint Meeting, July 7-11, 2008, Indianapolis, Indiana. No. 310. 2008 CDROM.

Auditing and assessing air quality in concentrated feeding operations - (Peer Reviewed Journal)

Cole, N.A., Todd, R.W., Auvermann, B., Parker, D. 2008. Auditing and assessing air quality in concentrated feeding operations. The Professional Animal Scientist. 24(2008):1-22.

Fungal and bacterial community structure downwind of a cattle feedyard - (Abstract)

Rice, W.C., Todd, R.W. 2007. Fungal and bacterial community structure downwind of a cattle feedyard [abstract]. ASA-CSSA-SSSA Annual International Meetings, November 4-7, 2007, New Orleans, Louisiana. 292-16. 2007 CDROM.

Opportunities to enhance performance and efficiency through nutrient synchrony in concentrate-fed ruminants - (Peer Reviewed Journal)

Cole, N.A., Todd, R.W. 2008. Opportunities to enhance performance and efficiency through nutrient synchrony in concentrate-fed ruminants. Journal of Animal Science Electronic Supplement. 86(E. Suppl.):E318-E333. Available: http://jas.fass.org/cgi/content/full/86/14_suppl/E318.

Ammonia emissions from open lot beef cattle feedyards on the Southern High Plains - (Proceedings/Symposium)

Todd, R.W., Cole, N.A., Clark, R.N. 2007. Ammonia emissions from open lot beef cattle feedyards on the Southern High Plains. In: Proceedings of the 16th Annual International Emission Inventory Conference, May 14-17, 2007. Raleigh, North Carolina. Available: http://www.epa.gov/ttn/chief/conference/ei16/session5/todd.pdf

Auditing and assessing nutrient management for air quality. - (Abstract)

Cole, N.A., Todd, R.W., Auvermann, B., Parker, D. 2007. Auditing and assessing nutrient management for air quality [abstract]. In: Journal of Animal Science Abstracts from 2007 Joint Meeting, of American Society of Animal Science, July 8-12, 2007, San Antonio, Texas. Volume 85, Supplement 1, p. 595.

Determining ammonia emissions from a cattle feedlot with an inverse dispersion technique - (Peer Reviewed Journal)

Flesch, T.K., Wilson, J.D., Harper, L.A., Todd, R.W., Cole, N.A. 2007. Determining ammonia emissions from a cattle feedlot with an inverse dispersion technique. Agriculture and Forest Meteorology. 144:139-155.

Use of fat and zeolite to reduce ammonia emissions from beef cattle feedyards. - (Proceedings/Symposium)

Cole, N.A., Todd, R.W., Parker, D.B. 2007. Use of fat and zeolite to reduce ammonia emissions from beef cattle feedyards. In: Proceedings of the ASABE International Symposium on Air Quality and Waste Management for Agriculture, September 16-19, 2007, Broomfield, Colorado. 2007 CD-ROM.

Flux-gradient estimates of ammonia emissions from beef cattle feedyard pens - (Proceedings/Symposium)

Todd, R.W., Cole, N.A., Harper, L.A., Flesch, T.K. 2007. Flux-gradient estimates of ammonia emissions from beef cattle feedyard pens. In: Proceedings of the ASABE International Symposium on Air Quality and Waste Management for Agriculture, September 16-19, 2007, Broomfield, Colorado. 2007 CD-ROM.

Challenges in using flux chambers to measure ammonia emissions from simulated open feedlot pen surfaces and retention ponds. - (Proceedings/Symposium)

Cole, N.A., Todd, R.W., Parker, D.B., Rhoades, M.B. 2007. Challenges in using flux chambers to measure ammonia emissions from simulated open feedlot pen surfaces and retention ponds. In: Proceedings of the ASABE International Symposium on AIr Quality and Waste Management for Agriculture, September 16-19, 2007, Broomfield, Colorado. 2007 CD-ROM.

Evaporation from cattle feedyard pens estimated by Bowen ratio-energy balance. - (Abstract)

Todd, R.W., Cole, N.A., Auvermann, B., Clark, R.N. 2006. Evaporation from cattle feedyard pens estimated by Bowen ratio-energy balance [abstract]. In: Proceedings of ASA-CSSA-SSSA Annual International Meeting, November 12-16, 2006, Indianapolis, Indiana. 2006 CDROM.

Environmental effects of the application of synthetic urine to feedlot surfaces - response of microbial populations. - (Abstract)

Rice, W.C., Cole, N.A., Todd, R.W. 2006. Environmental effects of the application of synthetic urine to feedlot surfaces - response of microbial populations [abstract]. In: Proceedings of ASA-CSSA-SSSA Annual International Meeting, November 12-16, 2006, Indianapolis, Indiana. 2006 CDROM.

AMMONIA AND HYDROGEN SULFIDE FLUX AND DRY DEPOSITION VELOCITY ESTIMATES USING VERTICAL GRADIENT METHOD AT A COMMERCIAL BEEF CATTLE FEEDLOT - (Peer Reviewed Journal)

Baek, B., Todd, R.W., Cole, N.A., Koziel, J. 2006. Ammonia and hydrogen sulfide flux and dry deposition velocity estimates using vertical gradient method at a commercial beef cattle feedlot. International Journal Global Environmental Issues. 6(2-3):189-203.

SOIL NITROGEN AND CARBON DISTRIBUTION ON NATIVE SHORTGRASS PRAIRIE ADJACENT TO A CATTLE FEEDYARD - (Abstract)

Todd, R.W., Cole, N.A., Clark, R.N., Rice, W.C. 2005. Soil nitrogen and carbon distribution on native shortgrass prairie adjacent to a cattle feedyard [abstract]. Agronomy Abstracts, ASA-CSSA-SSSA Annual Meeting, November 6-10, 2005, Salt Lake City, Utah. 2005 CDROM.

MICROBIAL POPULATIONS ASSOCIATED WITH SOIL DEPTH, SOIL PHOSPHORUS, AND VEGETATION CHANGES DOWNWIND OF A CATTLE FEEDYARD - (Abstract)

Rice, W.C., Todd, R.W. 2005. Microbial populations associated with soil depth, soil phosphorus, and vegetation changes downwind of a cattle feedyard [abstract]. Agronomy Abstracts, ASA-CSSA-SSSA Annual Meeting, November 6-10, 2005, Salt Lake City, Utah. 2005 CDROM.

REDUCING CRUDE PROTEIN IN BEEF CATTLE DIET REDUCES AMMONIA EMISSIONS FROM ARTIFICIAL FEEDYARD SURFACES - (Peer Reviewed Journal)

Todd, R.W., Cole, N.A., Clark, R.N. 2006. Reducing crude protein in beef cattle diet reduces ammonia emissions from artificial feedyard surfaces. Journal of Environmental Quality. 35:404-411.

SUMMARY OF ON-GOING RESEARCH AT USDA-ARS-CONSERVATION AND PRODUCTION RESEARCH LAB, BUSHLAND, TX - (Abstract)

Cole, N.A., Todd, R.W. 2005. Summary of on-going research at USDA-ARS Conservation and Production Research Lab, Bushland, TX. In: Proceeding of Plains Nutrition Council Spring Conference, April 14-15, 2005, San Antonio, Texas. p. 90-92.

AMMONIA AND GASEOUS NITROGEN EMISSIONS FROM A COMMERCIAL BEEF CATTLE FEEDYARD ESTIMATED USING THE FLUX-GRADIENT METHOD AND N:P RATIO ANALYSIS - (Proceedings/Symposium)

Todd, R.W., Cole, N.A., Harper, L.A., Flesch, T.K., Baak, B.H. 2005. Ammonia and gaseous nitrogen emissions from a commercial beef cattle feedyard estimated using the flux-gradient method and N:P ratio analysis. In: State of the Science Animal Manure and Waste Management, January 4-7, 2005, San Antonio, Texas. 2005 CDROM.

AMMONIA AND HYDROGEN SULFIDE FLUX AND DRY DEPOSITION VELOCITY ESTIMATES USING VERTICAL GRADIENT METHOD AT A COMMERCIAL BEEF CATTLE FEEDLOT - (Proceedings/Symposium)

Baak, B.H., Todd, R.W., Cole, N.A., Koziel, J.A. 2005. Ammonia and hydrogen sulfide flux and dry deposition velocity estimates using vertical gradient method at a commercial beef cattle feedlot. In: State of the Science Animal Manure and Waste Management, January 4-7, 2005, San Antonio, Texas. 2005 CDROM.

INFLUENCE OF DIETARY CRUDE PROTEIN CONCENTRATION AND SOURCE ON POTENTIAL AMMONIA EMISSIONS FROM BEEF CATTLE MANURE - (Peer Reviewed Journal)

Cole, N.A., Clark, R.N., Todd, R.W., Richardson, C.R., Gueye, A., Greene, L.W., McBride, K. 2005. Influence of dietary crude protein concentration and source on potential ammonia emissions from beef cattle manure. Journal of Animal Science. 83:722-731.

ASSIMILATION VERSUS ACCUMULATION OF MACRO- AND MICRONUTRIENTS IN SOILS: RELATIONS TO LIVESTOCK AND POULTRY FEEDING OPERATIONS - (Peer Reviewed Journal)

Cole, N.A., Schwartz, R.C., Todd, R.W. 2005. Assimilation versus accumulation of macro- and micronutrients in soils: relations to livestock and poultry feeding operations. Journal of Applied Poultry Research. 14:393-405.

(806)356-5750 - (Abstract)

Todd, R.W., Cole, N.A., Harper, L.A., Flesch, T.K., Clark, R.N. 2004. Flux-gradient estimates of ammonia emissions from a beef cattle feedyard [abstract]. Agronomy Abstracts, ASA-CSSA-SSSA Annual Meeting, Seattle, Washington. 2004 CDROM.

AIR-QUALITY AND GLOBAL-CHANGE GAS EMISSIONS IN A BEEF FEEDING OPERATION - (Abstract)

Harper, L.A., Flesch, T.K., Todd, R.W., Cole, N.A. 2004. Air-quality and global-change gas emissions in a beef feeding operation [abstract]. American Society of Agronomy Meetings. Paper No. 3805. CDROM.

ASSIMILATION VS. ACCUMULATION OF MACRO- AND MICRO-NUTRIENTS IN SOILS: RELATIONS TO LIVESTOCK FEEDING OPERATIONS - (Abstract)

Cole, N.A., Schwartz, R.C., Todd, R.W. 2004. Assimilation vs. accumulation of macro- and micro-nutrients in soils: relations to livestock feeding operations [abstract]. Journal of Animal Science Supplement. 82(1):80.

ASSIMILATION VS. ACCUMULATION OF MACRO- AND MICRO-NUTRIENTS IN SOILS: RELATIONS TO LIVESTOCK FEEDING OPERATIONS - (Proceedings/Symposium)

Cole, N.A., Schwartz, R.C., Todd, R.W. 2004. Assimilation vs. accumulation of macro- and micro-nutrients in soils: relations to livestock feeding operations. Extension Workshop held at the American Society of Animal Science Annual Meeting, July 26, 2004, St. Louis, Missouri. p. 36-51

AMMONIA FROM LIVESTOCK OPERATIONS: MEASUREMENT TECHNOLOGIES AND EMISSIONS - (Proceedings/Symposium)

Harper, L.A., Cole, N.A., Flesch, T.K., Sharpe, R.R., Todd, R.W., Wilson, J.D. 2004. Ammonia from livestock operations: Measurement technologies and emissions. Proceeding of Plains Nutrition Council Symposium. p. 27-50.

A COMPARISON OF AMMONIA EMISSION RATES FROM AN AGRICULTURAL AREA SOURCE USING DISPERSON MODELING: GAUSSIAN VERSUS BACKWARD-LAGRANGIAN STOCHASTIC. - (Proceedings/Symposium)

Price, J., Lacey, R., Shaw, B., Cole, N.A., Todd, R.W., Capareda, S., Parnell, C. 2004. A comparison of ammonia emission rates from an agricultural area source using disperson modeling: gaussian versus backward-lagrangian stochastic. In: Proceedings of American Society of Agricultural Engineers 2004 Annual International Meeting, August 1-4, 2004, Ottawa, Ontario, Canada. Paper No. 044199.

INFLUENCE OF DIETARY CRUDE PROTEIN ON POTENTIAL AMMONIA EMISSIONS FROM BEEF CATTLE MANURE - (Proceedings/Symposium)

Cole, N.A., Clark, R.N., Todd, R.W., Richardson, R., Gueye, A., Greene, L.W., Mcbride, K. 2003. Influence of dietary crude protein on potential ammonia emissions from beef cattle manure. International Conference on Air Pollution from Agricultural Operations. p. 183-188.

INFLUENCE OF DIETARY CRUDE PROTEIN ON POTENTIAL AMMONIA EMISSIONS FROM BEEF CATTLE MANURE - (Abstract)

Cole, N. A., Clark, R. N., Todd, R. W., Richardson, C. R., Gueye, A., Greene, L. W., Mcbride, K. Influence of Dietary Crude Protein on Potential Ammonia Emissions From Beef Cattle Manure. Journal of Animal Science. 2003. v. 81(Suppl.1). p. 110. Abstract No. 436.

VEGETATION AND SOIL CHANGES IN SHORTGRASS PRAIRIE NEAR A BEEF CATTLE FEEDYARD - (Proceedings/Symposium)

Todd, R.W., Wenxuan, G., Stewart, B.A., Robinson, C. 2003. Vegetation and soil changes in shortgrass prairie near a beef cattle feedyard. In: American Water Resources Association 2003 Spring Specialty Conference Proceedings, May 12-14, 2003, Kansas City, Missouri. 2003 CDROM.

LONG-TERM CHANGES IN SHORTGRASS PRAIRIE ADJACENT TO A BEEF CATTLE FEEDYARD - (Abstract)

Todd, R.W., Wenxuan, G., Stewart, B.A., Robinson, C. 2003. Long-term changes in shortgrass prairie adjacent to a beef cattle feedyard. In: Society for Range Management 56th Annual Meeting, February 2-6, 2003, Casper, Wyoming.

EFFECTS OF TALLER WHEAT RESIDUE AFTER STRIPPER HEADER HARVEST ON WIND RUN, IRRADIANT ENERGY INTERCEPTION, AND EVAPORATION - (Proceedings/Symposium) - (24-May-02)