Page Banner

United States Department of Agriculture

Agricultural Research Service

Related Topics

Richard W Todd (Rick)
Livestock Nutrient Management Research
Soil Science

Phone: (806) 356-5728
Fax: (806) 356-5750

CONSERVATION AND PRODUCTION RESEARCH LABORATORY
P.O. DRAWER 10 (2300 EXPERIMENT STATION RD - SHIP)
BUSHLAND , TX 790120010

Projects
Decreasing Greenhouse Gas Emission from Beef Cattle Production in the Southern Great Plains
General Cooperative Agreement (A)
  Accession Number: 429652
Develop Technologies to Protect Air Quality, Maintain Production Efficiency and Enhance Use of Manure from Southern Great Plains Beef and Dairy Agriculture
Appropriated (D)
  Accession Number: 428835
Resilience and Vulnerability of Beef Cattle Production in the Southern Great Plains Under Changing Climate, Land Use and Markets
Reimbursable (R)
  Accession Number: 428997
Resilience and Vulnerability of Beef Cattle Production in the Southern Great Plains under Changing Climate, Land Use and Markets
Reimbursable (R)
  Accession Number: 429025

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Urease inhibitor for reducing ammonia emissions from an open-lot beef cattle feedyard in the Texas High Plains -
Nitrous Oxide Emissions from Open-Lot Cattle Feedyards: A Review -
Waldrip, H., Todd, R.W., Parker, D.B., Cole, N.A., Rotz, C.A., Casey, K. 2016. Nitrous Oxide Emissions from Open-Lot Cattle Feedyards: A Review. Journal of Environmental Quality. DOI: 10-2134/JEQ2016.04.0140.
Pasture-scale methane emissions of grazing cattle -
Todd, R.W., Moffet, C., Neel, J.P., Turner, K.E., Steiner, J.L., Cole, N.A. 2016. Pasture-scale methane emissions of grazing cattle. Proceedings of the Great Plains Grazing Field Research Symposium, June 14, 2016, Stillwater, OK. p.46.
Reactive N emissions from beef cattle feedlots -
Todd, R.W., Waldrip, H., Parker, D.B., Cole, N.A. 2016. Reactive N emissions from beef cattle feedlots. American Society of Animal Science Annual Meeting 1(2016):44.
Pasture-scale measurement of methane emissions of grazing cattle -
Predicting greenhouse gas emissions from beef cattle feedyard manure -
Waldrip, H., Casey, K., Todd, R.W., Cole, N.A. 2015. Predicting greenhouse gas emissions from beef cattle feedyard manure [abstract]. In: ASA-CSSA-SSSA Annual Meeting. Emissions from Livestock Production: I. November 16, 2015, Minneapolis, MN. 96-3.
Nitrogen sustainability and beef cattle feedyards: II. Ammonia emissions -
Waldrip, H., Cole, N.A., Todd, R.W. 2015. Nitrogen sustainability and beef cattle feedyards: II. Ammonia emissions. Professional Animal Scientist. 31(5):395-411.
Process-based modeling of ammonia and nitrous oxide emissions from open lot beef and dairy facilities -
Bonifacio, H.F., Rotz, C.A., Leytem, A.B., Waldrip, H., Todd, R.W. 2015. Process-based modeling of ammonia and nitrous oxide emissions from open lot beef and dairy facilities. Transactions of the ASABE. 58:827-846.
Ammonia losses and nitrogen partitioning at the southern High Plains open lot dairy -
Todd, R.W., Cole, N.A., Hagevoort, R., Casey, K.D., Auvermann, B.W. 2015. Ammonia losses and nitrogen partitioning at the southern High Plains open lot dairy. Atmospheric Environment. 110:75-83 http://dx.doi.org/10.1016/j.atmosenv.2015.02.069.
Ammonia and nitrous oxide model for open lot cattle production systems -
Bonifacio, H.F., Rotz, C.A., Leytem, A.B., Waldrip, H., Todd, R.W. 2015. Ammonia and nitrous oxide model for open lot cattle production systems{Abstract}. Waste to Worth. p 72819.
Nitrogen sustainability and beef cattle feedyards: introduction and influence of pen surface conditions and diet -
Waldrip, H., Cole, N.A., Todd, R.W. 2015. Nitrogen sustainability and beef cattle feedyards: introduction and influence of pen surface conditions and diet. The Professional Animal Scientist 2015. 31:89-100 doi:10.15232/pas.2014-01361
Can surface-applied zeolite reduce ammonia losses from feedyard manure? A laboratory study -
Waldrip, H., Todd, R.W., Cole, N.A. 2015. Can surface-applied zeolite reduce ammonia losses from feedyard manure? A laboratory study. Trans.ASABE 58(1):137-145.
Development of knowledge and tools to enhance resilience of beef grazing systems for sustainable animal protein production -
Steiner, J.L., Engle, D.M., Xiao, X., Saleh, A., Tomlinson, P., Rice, C.W., Cole, N.A., Coleman, S.W., Osei, E., Basara, J., Middendorf, G., Gowda, P., Todd, R.W., Moffet, C., Swamy, A., Starks, P.J. 2014. Development of knowledge and tools to enhance resilience of beef grazing systems for sustainable animal protein production. Annals of the New York Academy of Sciences. 1328:10-17.
Using greenfeed to measure GHG emissions and energy losses by cattle -
Towards sustainability: nitrogen emissions from beef feedyards -
Predicting greenhouse gas emissions from beef cattle feedyard manure -
Waldrip, H., Casey, K.D., Todd, R.W., Cole, N.A. 2014. Predicting greenhouse gas emissions from beef cattle feedyard manure. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No.100-15.
Can surface-applied zeolite reduce ammonia losses from feedyard manure? A laboratory study -
Waldrip, H., Todd, R.W., Cole, N.A. 2014. Can surface-applied zeolite reduce ammonia losses from feedyard manure? A laboratory study. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No.260-6.
Greenhouse gas emissions from beef cattle feedlot pen surfaces in Texas -
Casey, K.D., Waldrip, H., Todd, R.W., Cole, N.A. 2014. Greenhouse gas emissions from beef cattle feedlot pen surfaces in Texas. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No.96-1.
Nutrient management and environmental and societal issues affecting sustainability of feedlot finishing systems -
Cole, N.A., Todd, R.W., Waldrip, H., Hales Paxton, K.E. 2014. Nutrient management and environmental and societal issues affecting sustainability of feedlot finishing systems. Journal of Animal Science. 91-E-SUPPL. 2/J.
Mitigating greenhouse gas emissions from beef cattle housing -
Cole, N.A., Todd, R.W., Waldrip, H., Shreck, A., Hales Paxton, K.E. 2014. Mitigating greenhouse gas emissions from beef cattle housing. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No.93-2.
Methane emissions from a beef cattle feedyard during winter and summer on the southern High Plains of Texas -
Todd, R.W., Cole, N.A., Waldrip, H. 2014. Methane emissions from a beef cattle feedyard during winter and summer on the southern High Plains of Texas. Journal of Environmental Quality. 43:1125-1130.
Process-based modeling of ammonia emission from beef cattle feedyards with the integrated farm systems model -
Waldrip, H., Rotz, C.A., Hafner, S.D., Todd, R.W., Cole, N.A. 2014. Process-based modeling of ammonia emission from beef cattle feedyards with the integrated farm systems model. Journal of Environmental Quality. 43:1159-1168.
Ammonia losses from a southern high plains dairy during summer -
Todd, R.W., Cole, N.A., Hagevoort, R., Casey, K.D. 2014. Ammonia losses from a southern high plains dairy during summer. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No.260-8.
Methane emissions from a beef cattle feedyard: measurements and models -
Greenhouse gas emissions from cattle systems: factors affecting emissions and mitigation strategies -
Cole, N.A., Todd, R.W., Waldrip, H., Hales Paxton, K.E. 2014. Greenhouse gas emissions from cattle systems: factors affecting emissions and mitigation strategies. Alberta Institute of Agrologists Annual Conference, April 1-3,2014, Banff, Canada. 1;6636.
Feed management for beef feedlots to reduce air emissions -
Characterization of organic matter in beef feedyard manure by Ultraviolet-Visible and Fourier transform infrared spectroscopies -
Waldrip, H., He, Z., Todd, R.W., Hunt, J.F., Rhoades, M.B., Cole, N.A. 2014. Characterization of organic matter in beef feedyard manure by Ultraviolet-Visible and Fourier transform infrared spectroscopies. Journal of Environmental Quality. 43:690-700.
Characterization of organic matter in beef feedyard manure by ultraviolet-visible and Fourier transform infrared spectroscopies -
Waldrip, H., He, Z., Todd, R.W., Hunt, J.F., Rhoades, M.B., Cole, N.A. 2014. Characterization of organic matter in beef feedyard manure by ultraviolet-visible and Fourier transform infrared spectroscopies. ASA-CSSA-SSSA Annual Meeting Abstracts. poster number 1105.
Optimal sensor locations for the backward Lagrangian stochastic technique in measuring lagoon gas emission -
Ro, K.S., Stone, K.C., Johnson, M.H., Hunt, P.G., Flesch, T., Todd, R.W. 2014. Optimal sensor locations for the backward Lagrangian stochastic technique in measuring lagoon gas emission. Journal of Environmental Quality. DOI: 10.02134/jeq2013.05.0163.
Greenhouse gas emissions from beef cattle feedlot pen surfaces in Texas during fall -
Casey, K.D., Vaddella, V., Waldrip, H., Todd, R.W., Faulkner, W.B. 2013. Greenhouse gas emissions from beef cattle feedlot pen surfaces in Texas during fall. Biological Engineering (ASABE). 1:1620819.
Prediction of nitrogen excretion by beef cattle: a meta-analysis -
Waldrip, H., Todd, R.W., Cole, N.A. 2013. Prediction of nitrogen excretion by beef cattle: a meta-analysis. Journal of Animal Science. 91:4290-4302.
Estimation of ammonia emissions from beef cattle feedyards using process-based model manure-dndc -
Waldrip, H., Todd, R.W., Cole, N.A., Li, C., Salas, W. 2013. Estimation of ammonia emissions from beef cattle feedyards using process-based model manure-dndc. Transactions of the ASABE. 56(3):1103-1114.
Seasonal methane emissions from a beef cattle feedyard on the U.S. southern High Plains -
Todd, R.W., Cole, N.A. 2013. Seasonal methane emissions from a beef cattle feedyard on the U.S. southern High Plains.5th Greenhouse Gases and Animal Agriculture Conference, June 23-26, 2013, Dublin, Ireland. Advances in Animal Biosciences, Cambridge University Press, 4(2):504.
Methane and ammonia emmissions from beef feeding in a U.S. southern High Plains region -
Flesch, T.K., Todd, R.W., Cole, N.A., Wilson, J.D. 2013. Methane and ammonia emmissions from beef feeding in a U.S. southern High Plains region. 5th Greenhouse Gases and Animal Agriculture Conference, June 23-26, 2013, Dublin, Ireland. Advances in Animal Biosciences, Cambridge University Press, 4(2):469.
Ammonia emissions from open lot dairies: lessons learned from beef cattle feedyards -
Todd, R.W., Cole, N.A., Auvermann, B.W., Waldrip, H. 2013. Ammonia emissions from open lot dairies: lessons learned from beef cattle feedyards. Western Dairy Air Quality Symposium. 1:1.
Nutrient management and environmental and societal issues affecting sustainability of feedlot finishing systems -
Cole, N.A., Todd, R.W., Waldrip, H., Hales Paxton, K.E., Macdonald, J.C. 2013. Nutrient management and environmental and societal issues affecting sustainability of feedlot finishing systems. American Society of Animal Science meeting, Indianapolis, Indiana, July 9-13, 2013. Journal of Animal Science, 91:E-Supplement 2.
Estimation of ammonia emissions from two commercial beef cattle feedyards in the southern high plains with process-based models -
Waldrip, H., Rotz, C.A., Li, C., Todd, R.W., Salas, W.G., Cole, N.A. 2013. Estimation of ammonia emissions from two commercial beef cattle feedyards in the southern high plains with process-based models. Proceedings of the National Conference on Livestock and Poultry Environmental quality; from Waste to Worth:spreading science and solutions. 1:85.
Ammonia emissions and emission factors: a summary of investigations at beef cattle feedyards on the southern high plains -
Todd, R.W., Cole, N.A., Waldrip, H. 2013. Ammonia emissions and emission factors: a summary of investigations at beef cattle feedyards on the southern high plains. 2013 Livestock and Poultry Environmental Learning Center Conference Waste to Worth. 1:86.
Effects of corn processing method and dietary inclusion of wet distillers grains with solubles on enteric methane emissions of finishing cattle. -
Cole, N.A., Hales Paxton, K.E., Todd, R.W., Macdonald, J.C. 2013. Effects of corn processing method and dietary inclusion of wet distillers grains with solubles on enteric methane emissions of finishing cattle. 2013 Livestock and Poultry Environmental Learning Center Conference, Waste to Worth. 1:18.
Arrhenius equation for modeling feedyard ammonia emissions using temperature and diet crude protein -
Todd, R.W., Cole, N.A., Aiken, R.M., Waldrip, H. 2013. Arrhenius equation for modeling feedyard ammonia emissions using temperature and diet crude protein. Journal of Environmental Quality. 42(3):666-671. doi:10.2134/jeq2012.0371.
Estimation of ammonia emissions from two commercial beef cattle feedyards in the southern high plains with process-based modeling. -
Waldrip, H., Rotz, C.A., Li, C., Todd, R.W., Salas, W.G., Cole, N.A. 2013. Estimation of ammonia emissions from two commercial beef cattle feedyards in the southern high plains with process-based modeling.2013 Livestock and Poultry Environmental Learning Center Conference, Waste to Worth. 1:91.
Effects of sensor location and the atmospheric stability on the accuracy of an inverse-dispersion technique for lagoon gas emission measurements -
Ro, K.S., Johnson, M.H., Stone, K.C., Hunt, P.G., Flesh, T., Todd, R.W., Trabue, S.L. 2013. Effects of sensor location and the atmospheric stability on the accuracy of an inverse-dispersion technique for lagoon gas emission measurements. In: Guideline on Air Quality Models: The path forward, March 19-21, 2013, Raleigh, North Carolina.
The carbon-footprint of cattle feeding: A North American perspective -
Cole, N.A., Todd, R.W., Hales Paxton, K.E. 2012. The carbon-footprint of cattle feeding: A North American perspective. American Society of Animal Science Proceedings. 01;28.
Estimation of ammmonia emissions from beef cattle feedyards in the Southern Plains with process-based modeling -
Waldrip, H., Todd, R.W., Cole, N.A., Li, C., Salas, W.H., Rotz, C.A. 2012. Estimation of ammmonia emissions from beef cattle feedyards in the Southern Plains with process-based modeling. ASA-CSSA-SSSA Annual Meeting Abstracts. 1:1.
Inverse-dispersion technique for assessing lagoon gas emissions -
Ro, K.S., Johnson, M.H., Stone, K.C., Hunt, P.G., Todd, R.W., Flesch, T. 2012. Inverse-dispersion technique for assessing lagoon gas emissions. In: Proceedings of the American Society of Agricultural and Biological Engineers Annual International Meeting, July 29-August 1, 2012, Dallas, Texas, Paper #12-1337658. 8 pp.
Characterization of ammonium sorption by beef feedyard manure -
Waldrip, H., Todd, R.W., Cole, N.A. 2012. Characterization of ammonium sorption by beef feedyard manure. Transactions of the ASABE. 55(4):1609-1619.
Ammonia emissions from cattle feeding operations. -
Preece, S.L., Cole, N.A., Todd, R.W., Auvermann, B.W. 2012. Ammonia emissions from cattle-feeding operations. Texas A&M Agrilife Extension. E-632. p.1-15.
Ammonia emissions from beef cattle feedyard: a summary of seven years of research -
Nitrogen enrichment and species change in shortgrass prairie adjacent to a cattle feedyard -
Estimation of ammonia emissions from beef cattle feedyards in the southern high plains with process-based modeling -
Accuracy of lagoon gas emissions using an inverse dispersion method -
Ro, K.S., Johnson, M.H., Stone, K.C., Hunt, P.G., Todd, R.W., Flesch, T. 2012. Accuracy of lagoon gas emissions using an inverse dispersion method. In: Proceedings of the International Symposium on Emissions of Gas and Dust from Livestock, June 10-12, 2012, Saint-Malo, France.
Nutritional management of feedlot cattle to optimize performance and minimize environmental impact -
Cole, N.A., Hales, K.E., Todd, R.W., Parker, D.B., Brown, M.S., Macdonald, J.C. 2012. Nutritional management of feedlot cattle to optimize performance and minimize environmental impact. 4th International Symposium of Beef Cattle Production, July 7-10,2012, Viscosa, Brazil. p.1-49.
Phase feeding crude protein to decrease ammonia emissions from finishing beef cattle -
Cole, N.A., Todd, R.W. 2012. Phase feeding crude protein to decrease ammonia emissions from finishing beef cattle. Available: www.ars.usda.gov/SP2UserFiles/Program/212.
Standardization of flux chamber and wind tunnel flux measurements for quantifying volatile organic compound and ammonia emissions from area sources at animal feeding operations -
Parker, D.B., Ham, J., Woodbury, B.L., Cai, L., Spiehs, M.J., Rhoades, M., Trabue, S.L., Casey, K., Todd, R.W., Cole, N.A. 2013. Standardization of flux chamber and wind tunnel flux measurements for quantifying volatile organic compound and ammonia emissions from area sources at animal feeding operations. Atmospheric Environment. 66:72-83.
Measuring gas emissions from animal waste lagoons with an inverse-dispersion technique -
Ro, K.S., Johnson, M.H., Stone, K.C., Hunt, P.G., Flesch, T., Todd, R.W. 2013. Measuring gas emissions from animal waste lagoons with an inverse-dispersion technique. Atmospheric Environment. 66:101-106.
Assessment and mitigation of greenhouse gas emissions from feedlots -
Ammonia emissions from cattle-feeding operations. Part 2: abatement. -
Sakirkin, S., Todd, R.W., Cole, N.A., Avermann, B.W. 2011. Ammonia emissions from cattle-feeding operations. Part 2: abatement. Texas Agricultural Experiment Station Bulletin, Air Quality Education in Animal Agriculture, Issues: Abatement, December, 2011. p. 1-11.
Ammonia emissions from cattle-feeding operations. Part 1: issues and emissions. -
Sakirkin, S.L., Cole, N.A., Todd, R.W., Auvermann, B.W. 2012. Ammonia emissions from cattle-feeding operations. Part 1: issues and emissions. Texas Agricultural Experiment Station Bulletin, Air Quality Education in Animal Agriculture, Issues: Ammonia, December, 2011. p. 1-11.
Dietary management to decrease methane emissions from beef feedlots -
Cole, N.A., Todd, R.W., Hales, K.E. 2012. Dietary management to decrease methane emissions from beef feedlots. Available:www.ars.usdagov/SP2UserFiles/Program/212.
Temperature, diet control ammonia loss from feedyards -
Todd, R.W. 2011. Temperature, diet control ammonia loss from feedyards. Popular Publication. American Society of Agronomy. https://www.agronomy.org/.
Standardization of flux chambers and wind tunnels for area source emission measurements at animal feeding operations -
Parker, D.B., Ham, J., Woodbury, B.L., Cai, L., Spiehs, M.J., Trabue, S.L., Casey, K., Todd, R.W., Cole, N.A. 2011. Standardization of flux chambers and wind tunnels for area source emission measurements [abstract]. In: Proceedings 242nd American Chemical Society National Meeting, Denver, CO; Aug. 28-Sept. 1, 2011. Abstract no. 142.
Standardization of flux chamber and wind tunnel flux measurements for quantifying emissions from area sources at animal feeding operations -
Parker, D.B., Ham, J., Woodbury, B.L., Cai, L., Spiehs, M.J., Rhoades, M., Trabue, S.L., Todd, R.W., Cole, N.A. 2011. Standardization of flux chamber and wind tunnel flux measurements for quantifying emissions from area sources at animal feeding operations. In: Proceeding of the American Society of Agricultural and Biological Engineers (ASABE) Annual International Meeting, August 7-10, 2011, Louisville, Kentucky. Paper No. 1111166.
Validity of using backward Lagrangian Stochastic technique in measuring trace gas emission from treatment lagoon -
Ro, K.S., Johnson, M.H., Stone, K.C., Hunt, P.G., Todd, R.W., Flesch, T. 2011. Validity of using backward Lagrangian Stochastic technique in measuring trace gas emission from treatment lagoon [abstract]. In: Proceedings of the American Society of Agronomy-Crop Science Society of America-Soil Science Society of America Annual Meeting, October 16-19, 2011, San Antonio, Texas.
Methane and ammonia emissions from New Mexico dairy lagoons in summer -
Methane and ammonia emissions from New Mexico dairy lagoons in summer -
Research Update: The USDA-ARS-Conservation and Production Research Laboratory, Bushland, Texas -
Cole, N.A., Hales, K.E., Todd, R.W. 2011. Research Update: The USDA-ARS-Conservation and Production Research Laboratory, Bushland, Texas. In: Proceeding of 2011 Plains Nutrition Council Spring Conference, April 14-15, 2011, San Antonio, Texas. p. 64-72.
Ammonia emissions from a commercial feedyard measured using passive samplers and a box model -
Cole, N.A., Todd, R.W., Parker, D.B., Rhoades, M., Mason, A.M. 2011. Ammonia emissions from a commercial feedyard measured using passive samplers and a box model [abstract]. Journal of Animal Science. 89, E-Suppl.1:757.
Daily, monthly, seasonal, and annual ammonia emissions from Southern High Plains cattle feedyards -
Todd, R.W., Cole, N.A., Rhoades, M.B., Parker, D.B., Casey, K. 2011. Daily, monthly, seasonal, and annual ammonia emissions from Southern High Plains cattle feedyards. Journal of Environmental Quality. 40:1-6.
Water requirements and management of maize under drip and sprinkler irrigation. 1999 annual report for Agricultural Technology Utilization and Transfer (ATUT) project -
Evett, S.R., Howell, T.A., Schneider, A.A., Todd, R.W., Mustafa, A.A., Abou-Zeid, W. 2011. Water requirements and management of maize under drip and sprinkler irrigation. 1999 annual report for Agricultural Technology Utilization and Transfer (ATUT) project. Scientific and Technical Review. pp 1-16.
Nutrition - An effective tool for mitigating ammonia emissions from dairy and feedlot operations -
Hristov, A., Hanigan, M., Cole, N.A., Todd, R.W., McAllister, T., Ndegwa, P., Rotz, C.A. 2011. Nutrition - An effective tool for mitigating ammonia emissions from dairy and feedlot operations [abstract]. Journal of Animal Science Supplement 89, E-Suppl. 2:143-144.
Methane emissions from Southern High Plains dairy wastewater lagoons in the summer -
Todd, R.W., Cole, N.A., Casey, K.D., Hagevoort, R., Auvermann, B.W. 2011. Methane emissions from Southern High Plains dairy wastewater lagoons in the summer. Animal Feed Science And Technology. 166-167:575-580.
Review: Ammonia emissions from dairy farms and beef feedlots -
Hristov, A., Hanigan, M., Cole, N.A., Todd, R.W., McAllister, T., Ndegwa, P., Rotz, C.A. 2011. Review: Ammonia emissions from dairy farms and beef feedlots. Canadian Journal of Animal Science. 91:1-35.
Continuous ammonia emission measurements from a commercial beef feedyard in Texas -
Rhoades, M.B., Parker, D.B., Cole, N.A., Todd, R.W., Caraway, E.A., Auvermann, B.W., Topliff, D.R., Schuster, G.L. 2010. Continuous ammonia emission measurements from a commercial beef feedyard in Texas. Transactions of the ASABE. 53(6):1823-1831.
Methane emissions from a New Mexico dairy lagoon system -
Todd, R.W., Cole, N.A., Casey, K.D., Hagevoort, R., Auvermann, B.W. 2010. Methane emissions from a New Mexico dairy lagoon system. In: Proceeding of the 2010 International Symposium on Air Quality and Waste Management for Agriculture, September 13-16, 2010, Dallas, Texas. ASABE Publication No. 711P0510cd. doi: http://asae.frymulti.com/azdez.asp?search=1&JID=1&AID=32618&CID=isaq2010&v=&i=&T=1
Influence of Feedlot Manure Applications on Soil Microbial Communities Associated with Short Grass Prairie and Conservation Reserve Program Grassland -
Rice, W.C., Todd, R.W. 2010. Influence of Feedlot Manure Applications on Soil Microbial Communities Associated with Short Grass Prairie and Conservation Reserve Program Grassland [abstract}. 13th International Symposium on Microbial Ecology. August 22-27, 2010, Seattle, Washington. 2010 Flashdrive.
Temperature dependence of feedyard ammonia emissions: The Arrhenius equation -
Todd, R.W., Cole, N.A., Aiken, R.M. 2010. Temperature dependence of feedyard ammonia emissions: The Arrhenius equation [abstract]. In: ASA-CSSA-SSSA 2010 International Annual Meeting Abstracts. October 31-November 4, 2010, Long Beach, California. Paper 266-8. 2010 CDROM.
Effect of Wind Tunnel Air Velocity on VOC Flux from Standard Solutions and CAFO Manure/Wastewater -
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.
Diel and seasonal dynamics of ammonia emissions from cattle feedyards -
Todd, R.W., Cole, N.A., Clark, R.N. 2009. Diel and seasonal dynamics of ammonia emissions from cattle feedyards [abstract]. 2009 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America International Annual Meetings, November 1-5, 2009, Pittsburgh, Pennsylvania. 2009 CDROM.
Effect of feeding distiller's grains on dietary crude protein and ammonia emissions from beef cattle feedyards -
Todd, R.W., Cole, N.A., Parker, D.B., Rhoades, M., Casey, K. 2009. Effect of feeding distiller's grains on dietary crude protein and ammonia emissions from beef cattle feedyards. In: Proceedings of the Texas Animal Manure Management Issues Conference, September 29-30, 2009, Round Rock, Texas. p. 37-44.
Nitrogen and phosphorus balance of beef cattle feedyards -
Cole, N.A., Todd, R.W. 2009. Nitrogen and phosphorus balance of beef cattle feedyards. In: Proceedings of the Texas Animal Manure Management Issues Conference, September 29-30, 2009, Round Rock, Texas. p. 17-24.
Response of native short grass prairie and Conservation Reserve Program grassland soil microbial communities to feedyard cattle manure applications -
Rice, W.C., Todd, R.W. 2009. Response of native short grass prairie and Conservation Reserve Program grassland soil microbial communities to feedyard cattle manure applications [abstract]. 2009 Agronomy Society of America, Crop Science Society of America, and Soil Science Society of America International Annual Meetings, November 1-5, 2009, Pittsburgh, Pennsylvania. 2009 CDROM.
Comparison of ammonia emissions determined using different sampling methods -
Paris, C.S., Parker, D.B., Cole, N.A., Todd, R.W., Caraway, E.A., Rhoades, M.B., Baniya, B., Brown, T.B. 2009. Comparison of ammonia emissions determined using different sampling methods. In: Proceedings of the Texas Animal Manure Management Issues Conference, September 28-30, 2009, Round Rock, Texas. p. 83-90.
Monthly, seasonal, and annual ammonia emissions from Southern High Plains cattle feedyards -
Todd, R.W., Cole, N.A., Rhoades, M.B., Parker, D.B. 2009. Monthly, seasonal, and annual ammonia emissions from Southern High Plains cattle feedyards [abstract]. In: Proceedings of the 2009 American Chemical Society annual meeting, August 17-20, 2009, Washington, D.C. Paper No. 210. 2009 CDROM.
Chemical composition of pen surface layers of beef cattle feedyards -
Cole, N.A., Mason, A., Todd, R.W., Rhoades, M., Parker, D. 2009. Chemical composition of pen surface layers of beef cattle feedyards. Professional Animal Scientist. 25:541-552.
Effects of urine application on chemistry of feedlot pen surfaces -
Cole, N.A., Mason, A., Todd, R.W., Parker, D.B. 2009. Effects of urine application on chemistry of feedlot pen surfaces [abstract]. Journal of Animal Science Supplement. 87:E-Suppl. 2, p. 148.
Continuously measured annual ammonia emissions from Southern High Plains beef cattle feedyards -
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 Reprint Icon -
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 Reprint Icon -
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 -
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.
Soil nitrogen distribution and deposition on shortgrass prairie adjacent to a beef cattle feedyard -
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.
Challenges in using flux chambers to measure ammonia and VOC emissions from open feedlot pen surfaces and retention ponds -
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 -
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 -
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 Reprint Icon -
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 Reprint Icon -
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. -
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 Reprint Icon -
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. -
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 -
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. -
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. -
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. -
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 -
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.
MICROBIAL POPULATIONS ASSOCIATED WITH SOIL DEPTH, SOIL PHOSPHORUS, AND VEGETATION CHANGES DOWNWIND OF A CATTLE FEEDYARD -
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.
SOIL NITROGEN AND CARBON DISTRIBUTION ON NATIVE SHORTGRASS PRAIRIE ADJACENT TO A CATTLE FEEDYARD -
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.
REDUCING CRUDE PROTEIN IN BEEF CATTLE DIET REDUCES AMMONIA EMISSIONS FROM ARTIFICIAL FEEDYARD SURFACES -
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 -
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 HYDROGEN SULFIDE FLUX AND DRY DEPOSITION VELOCITY ESTIMATES USING VERTICAL GRADIENT METHOD AT A COMMERCIAL BEEF CATTLE FEEDLOT -
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.
AMMONIA AND GASEOUS NITROGEN EMISSIONS FROM A COMMERCIAL BEEF CATTLE FEEDYARD ESTIMATED USING THE FLUX-GRADIENT METHOD AND N:P RATIO ANALYSIS -
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.
INFLUENCE OF DIETARY CRUDE PROTEIN CONCENTRATION AND SOURCE ON POTENTIAL AMMONIA EMISSIONS FROM BEEF CATTLE MANURE -
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 -
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.
AIR-QUALITY AND GLOBAL-CHANGE GAS EMISSIONS IN A BEEF FEEDING OPERATION -
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.
(806)356-5750 -
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.
ASSIMILATION VS. ACCUMULATION OF MACRO- AND MICRO-NUTRIENTS IN SOILS: RELATIONS TO LIVESTOCK FEEDING OPERATIONS -
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 -
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 -
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. -
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 -
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.
VEGETATION, PHOSPHORUS, AND DUST GRADIENTS DOWNWIND FROM A CATTLE FEEDYARD -
Todd, R.W., Guo, W., Stewart, B.A., Robinson, C. 2004. Vegetation, phosphorus, and dust gradients downwind from a cattle feedyard. Journal of Range Management. 57:291-299
INFLUENCE OF DIETARY CRUDE PROTEIN ON POTENTIAL AMMONIA EMISSIONS FROM BEEF CATTLE MANURE -
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 -
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 -
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 -
VEGETATION CHANGES IN A NATIVE SHORTGRASS PASTURE ADJACENT TO A BEEF CATTLEFEEDYARD -
ALFALFA REFERENCE ET MEASUREMENT AND PREDICTION -
THE BOWEN RATIO-ENERGY BALANCE METHOD EVALUATED IN THE SEMIARID ADVECTIVE ENVIRONMENT OF THE SOUTHERN HIGH PLAINS -
SOIL TEMPERATURE AND WATER EVAPORATION OF SMALL STEEL AND PLASTIC LYSIMETERS REPLACED DAILY -
THE BOWEN RATIO-ENERGY BALANCE METHOD FOR ESTIMATING LATENT HEAT FLUX OF IRRIGATED ALFALFA EVALUATED IN A SEMI-ARID, ADVECTIVE ENVIRONMENT -
STOMATAL RESPONSE OF ALFALFA TO INCREASING WATER DEFICIT -
NITRATE LEACHING IN IRRIGATED CORN AND SOYBEAN IN A SEMI-ARID CLIMATE -
EVAPOTRANSPIRATION OF IRRIGATED FESCUE GRASS IN A SEMI-ARID ENVIRONMENT -
LATENT HEAT FLUX OF IRRIGATED ALFALFA MEASURED BY WEIGHING LYSIMETER AND BOWEN RATIO-ENERGY BALANCE -
EVAPOTRANSPIRATION OF IRRIGATED ALFALFA IN A SEMI-ARID ENVIRONMENT -
CANOPY SURFACE AND STOMATAL RESISTANCES OF ALFALFA IN A SEMI-ARID, ADVECTIVE ENVIRONMENT -
Last Modified: 5/2/2016
Footer Content Back to Top of Page