Projects

DEVELOP TECHNOLOGIES TO PROTECT AIR QUALITY, MAINTAIN PRODUCTION EFFICIENCY & ENHANCE USE OF MANURE FROM SOUTHN GREAT PLAINS BEEF & DAIRY AG Appropriated (D)   Accession Number: 419829

AIR QUALITY: REDUCING EMISSIONS FROM CATTLE FEEDLOTS AND DAIRIES (TX AND KS)- CONTINUED Reimbursable (R)   Accession Number: 420572

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

Arrhenius equation for modeling feedyard ammonia emissions using temperature and diet crude protein - (Peer Reviewed Journal) - (14-Jan-13)

Estimation of ammonia emissions from two commercial beef cattle feedyards in the southern high plains with process-based modeling. - (Abstract Only) - (04-Dec-12)

Effects of sensor location and the atmospheric stability on the accuracy of an inverse-dispersion technique for lagoon gas emission measurements - (Proceedings) - (30-Nov-12)

The carbon-footprint of cattle feeding: A North American perspective - (Proceedings) - (22-Nov-12)

Estimation of ammmonia emissions from beef cattle feedyards in the Southern Plains with process-based modeling - (Abstract Only) - (19-Jul-12)

Inverse-dispersion technique for assessing lagoon gas emissions - (Proceedings)

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 - (Peer Reviewed Journal)

Waldrip, H., Todd, R.W., Cole, N.A. 2012. Characterization of ammonium sorption by beef feedyard manure [abstract]. Transactions of the ASABE. 55(4):1609-1619.

Ammonia emissions from cattle feeding operations. - (Experiment Station)

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 - (Abstract Only) - (17-May-12)

Nitrogen enrichment and species change in shortgrass prairie adjacent to a cattle feedyard - (Abstract Only) - (17-May-12)

Estimation of ammonia emissions from beef cattle feedyards in the southern high plains with process-based modeling - (Abstract Only) - (17-May-12)

Accuracy of lagoon gas emissions using an inverse dispersion method - (Proceedings)

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 - (Proceedings)

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 - (Government Publication)

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 - (Peer Reviewed Journal)

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 - (Peer Reviewed Journal)

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 - (Other) - (15-Nov-11)

Ammonia emissions from cattle-feeding operations. Part 2: abatement. - (Experiment Station)

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. - (Experiment Station)

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 - (Government Publication)

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 - (Popular Publication)

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 - (Abstract Only)

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 - (Proceedings)

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 - (Abstract Only)

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 - (Proceedings) - (20-Apr-11)

Methane and ammonia emissions from New Mexico dairy lagoons in summer - (Other) - (20-Apr-11)

Research Update: The USDA-ARS-Conservation and Production Research Laboratory, Bushland, Texas - (Proceedings)

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 - (Abstract Only)

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 - (Peer Reviewed Journal)

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 - (Research Notes)

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 - (Abstract Only)

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 - (Peer Reviewed Journal)

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 - (Peer Reviewed Journal)

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 - (Peer Reviewed Journal)

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 - (Proceedings)

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 - (Abstract Only)

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 - (Abstract Only)

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 - (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.

Diel and seasonal dynamics of ammonia emissions from cattle feedyards - (Abstract Only)

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 - (Proceedings)

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 - (Proceedings)

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 - (Abstract Only)

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 - (Proceedings)

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 - (Abstract Only)

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 - (Peer Reviewed Journal)

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 - (Abstract Only)

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 - (Abstract Only)

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)

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)

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.

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.

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

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 Only)

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)

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 Only)

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)

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)

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)

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 Only)

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 Only)

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 Only)

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 Only)

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 Only)

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)

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)

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 Only)

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 Only)

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 Only)

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)

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)

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)

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)

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 - (Peer Reviewed Journal)

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 - (Abstract Only)

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)

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 Only)

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) - (24-May-02)

VEGETATION CHANGES IN A NATIVE SHORTGRASS PASTURE ADJACENT TO A BEEF CATTLEFEEDYARD - (Abstract Only) - (21-Oct-01)

ALFALFA REFERENCE ET MEASUREMENT AND PREDICTION - (Proceedings) - (14-Nov-00)

THE BOWEN RATIO-ENERGY BALANCE METHOD EVALUATED IN THE SEMIARID ADVECTIVE ENVIRONMENT OF THE SOUTHERN HIGH PLAINS - (Abstract Only) - (05-Jul-00)

SOIL TEMPERATURE AND WATER EVAPORATION OF SMALL STEEL AND PLASTIC LYSIMETERS REPLACED DAILY - (Peer Reviewed Journal) - (11-May-00)

THE BOWEN RATIO-ENERGY BALANCE METHOD FOR ESTIMATING LATENT HEAT FLUX OF IRRIGATED ALFALFA EVALUATED IN A SEMI-ARID, ADVECTIVE ENVIRONMENT - (Peer Reviewed Journal) - (17-Mar-00)

STOMATAL RESPONSE OF ALFALFA TO INCREASING WATER DEFICIT - (Abstract Only) - (01-Nov-99)

NITRATE LEACHING IN IRRIGATED CORN AND SOYBEAN IN A SEMI-ARID CLIMATE - (Peer Reviewed Journal) - (15-Aug-99)

LATENT HEAT FLUX OF IRRIGATED ALFALFA MEASURED BY WEIGHING LYSIMETER AND BOWEN RATIO-ENERGY BALANCE - (Other) - (12-Jul-98)

EVAPOTRANSPIRATION OF IRRIGATED ALFALFA IN A SEMI-ARID ENVIRONMENT - (Other) - (12-Jul-98)

EVAPOTRANSPIRATION OF IRRIGATED FESCUE GRASS IN A SEMI-ARID ENVIRONMENT - (Other) - (12-Jul-98)

CANOPY SURFACE AND STOMATAL RESISTANCES OF ALFALFA IN A SEMI-ARID, ADVECTIVE ENVIRONMENT - (Abstract Only) - (12-Jun-98)