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ARS Home » Plains Area » Bushland, Texas » Conservation and Production Research Laboratory » Livestock Nutrient Management Research » People & Locations » Heidi Waldrip
Heidi M Waldrip
Livestock Nutrient Management Research
Research Soil Scientist

Phone: (806) 356-5764
Fax: (806) 356-5750
Room 6

CONSERVATION & PRODUCTION RESEARCH LAB
P.O. DRAWER 10 (2300 EXPERIMENT STATION RD-SHIP)
BUSHLAND , TX 79012
Projects
Improved Practices to Conserve Air Quality, Maintain Animal Productivity, and Enhance Use of Manure and Soil Nutrients of Cattle Production Systems for the Southern Great Plains
In-House Appropriated (D)
  Accession Number: 431554

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Nitrous oxide from beef cattle feedyards: Understanding effects of microbial community structure, climate and manure properties -
Diurnal measurements of methane emissions from a feedyard pen surface in Texas during Spring -
Empirical model of annual nitrous oxide emissions from open-lot beef cattle feedyard pens in the southern high plains -
Parker, D.B., Cortus, E.L., Casey, K.D., Marek, G.W., Heflin, K.R., Waldrip, H. 2018. Empirical model of annual nitrous oxide emissions from open-lot beef cattle feedyard pens in the southern high plains [abstract]. ASABE Annual International Meeting. Paper #1800508.
Tetracycline and sulfonamide antibiotic resistance genes in soils from Nebraska organic farming operations -
Cadenas, M., Durso, L.M., Miller, D.N., Waldrip, H., Castleberry, B., Drijber, R.A., Wortman, C. 2018. Tetracycline and sulfonamide antibiotic resistance genes in soils from Nebraska organic farming operations. Frontiers in Microbiology. 9:1283.
How do temperature and rainfall affect nitrous oxide emissions from open-lot beef cattle feedyard pens? -
Parker, D.B., Waldrip, H., Casey, K.D., Woodbury, B.L., Spiehs, M.J., Webb, K., Willis, W.M. 2018. How do temperature and rainfall affect nitrous oxide emissions from open-lot beef cattle feedyard pens? Transactions of the ASABE. 61(3): 1049-1061. doi:10.13031/trans.12788.
Identifying challenges and opportunities for improved nutrient management through U.S.D.A's Dairy Agroecosystem Working Group -
Holly, M.A., Kleinman, P.J., Bryant, R.B., Bjorneberg, D.L., Church, C., Baker, M.E., Boggess, M.V., Chintala, R., Feyereisen, G.W., Gamble, J.D., Leytem, A.B., Reed, K., Rotz, C.A., Vadas, P.A., Waldrip, H., Brauer, D.K. 2018. Identifying challenges and opportunities for improved nutrient management through U.S.D.A's Dairy Agroecosystem Working Group. Journal of Dairy Science. 101:1-10. https://doi.org/10.3168/jds.2017-13819.
Identifying challenges and opportunities for improved nutrient management through U.S.D.A's Dairy Agroecosystem Working Group -
Holly, M.A., Kleinman, P.J., Bryant, R.B., Bjorneberg, D.L., Rotz, C.A., Baker, J.M., Boggess, M.V., Brauer, D.K., Chintala, R., Feyereisen, G.W., Gamble, J.D., Leytem, A.B., Reed, K., Vadas, P.A., Waldrip, H. 2018. Identifying challenges and opportunities for improved nutrient management through U.S.D.A's Dairy Agroecosystem Working Group. Journal of Dairy Science. 101(7):6632-6641. https://doi.org/10.3168/jds.2017-13819.
Nitrous oxide from beef cattle feedyards: Understanding effects of microbial community structure, climate and manure properties on denitrification -
Waldrip, H., Parker, D.B., Miller, S., Miller, D.N., Durso, L.M., Casey, K., Todd, R.W., Cortus, E. 2018 [abstract]. Nitrous oxide from beef cattle feedyards: Understanding effects of microbial community structure, climate and manure properties on denitrification. ASABE Annual International Meeting. Paper #1801295.
Phosphorus distribution in soils treated with bioenergy co-product materials following corn growth -
Pagliari, P.H., Strock, J.S., Johnson, J.M., Waldrip, H. 2018. Phosphorus distribution in soils treated with bioenergy co-product materials following corn growth. Agronomy Journal. 110(3):850-858. doi:10.2134/agronj2017.04.0239.
Unscrambling nitrous oxide production in beef cattle feedyard manure: Effect of temperature and water content on denitrification rates -
Impact of management practices on water extractable organic carbon and nitrogen from 12-year poultry litter amended soils -
He, Z., Zhang, M., Zhao, A., Waldrip, H.M., Pagliari, P.H., Harmel, R.D. 2017. Impact of management practices on water extractable organic carbon and nitrogen from 12-year poultry litter amended soils. Open Journal of Soil Science. 7:259-277.
Temporal nitrous oxide emissions from beef cattle feedlot manure following a simulated rainfall event -
Parker, D.B., Waldrip, H., Casey, K.D., Todd, R.W., Willis, W.M., Webb, K. 2017. Temporal nitrous oxide emissions from beef cattle feedlot manure following a simulated rainfall event. Journal of Environmental Quality. 46:733-740 doi:10.2134/jeq2017.02.0042.
Nitrous oxide emissions from southern high plains beef cattle feedyards: Measurement and Modeling -
Waldrip, H., Todd, R.W., Parker, D.B., Casey, K.D. 2017. Nitrous oxide emissions from southern high plains beef cattle feedyards: Measurement and modeling. Transactions of the ASABE. 60: 1209-1221. doi: 10.13031/trans.12085.
How well do we understand nitrous oxide emissions from open-lot cattle systems? -
Waldrip, H., Casey, K., Todd, R.W., Parker, D.B., Rotz, C.A., Cole, N.A. 2017. How well do we understand nitrous oxide emissions from open-lot cattle systems?. Waste to Worth Conference. Pg. 74413. Available at https://articles.extension.org/pages/74413/how-well-do-we-understand-nitrous-oxide-emissions-from-open-lot-cattle-systems.
Diurnal variation in greenhouse fluxes from a feedyard pen surface -
Improved chamber systems for rapid, real-time nitrous oxide emissions from manure and soil -
Parker, D.B., Todd, R.W., Waldrip, H., Webb, K., Willis, W.M., Meyer, B.E., Marek, G.W., Casey, K.D., Auvermann, B., Marek, T., Pemberton, B. 2017. Improved chamber systems for rapid, real-time nitrous oxide emissions from manure and soil. Transactions of the ASABE. 60:(4)1235-1258. doi:10.13031/trans.1215a.
Spatial variability in nitrous oxide and methane emissions from beef cattle feedyard pen surfaces -
Casey, K., Waldrip, H., Parker, D.B., Todd, R.W. 2017. Spatial variability in nitrous oxide and methane emissions from beef cattle feedyard pen surfaces. Waste to Worth Conference, April 18-21, 2017, Raleigh, NC.
Applied and environmental chemistry of animal manure: A review -
He, Z., Pagliari, P.H., Waldrip, H.M. 2016. Applied and environmental chemistry of animal manure: A review. Pedosphere. 26:779-816.
Urease inhibitor for reducing ammonia emissions from an open-lot beef cattle feedyard in the Texas High Plains -
Parker, D.B., Rhoades, M.B., Koziel, J.A., Baek, B., Waldrip, H., Todd, R.W. 2016. Urease inhibitor for reducing ammonia emissions from an open-lot beef cattle feedyard in the Texas High Plains. Applied Engineering in Agriculture. 32(6):823-832. doi:10.13031/aea.32.11897.
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.
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.
Estimating emissions from beef and dairy production systems -
Waldrip, H. 2016. Estimating emissions from beef and dairy production systems. ENVR 3092/6092 Fundamentals of Air Quality. Meeting Abstract. CDROM.
Phosphorus concentrations in sequentially fractionated soil samples as affected by digestion methods -
Do Nascimento, C.A.C., Pagliari, P.H., Schmitt, D., He, Z., Waldrip, H. 2015. Phosphorus concentrations in sequentially fractionated soil samples as affected by digestion methods. Scientific Reports. 5:17967(13 pages). DOI:10.1038/srep17967.
Legacy phosphorus in calcareous soils: effects of long-term poultry litter application -
Waldrip, H., Pagliari, P.H., He, Z., Harmel, R.D., Cole, N.A., Zhang, M. 2015. Legacy phosphorus in calcareous soils: effects of long-term poultry litter application. Soil Science Society of America Journal. 79(2015):1601-1614.
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.
Legacy phosphorus in calcareous soils: Effects of long-term poultry litter application -
Waldrip, H., Pagliari, P.H., Harmel, R.D., He, Z., Cole, N.A. 2016. Legacy phosphorus in calcareous soils: Effects of long-term poultry litter application [abstract]. In: ASA-CSSA-SSSA Annual Meeting. Environmental Implications of Using Poultry Litter in Agriculture. November 18, 2015, Minneapolis, MN. 388-1.
Phosphorus concentrations in sequentially fractionated soil samples as affected by digestion methods -
Do Nascimento, C., Pagiliari, P.H., Schmidt, D., He, Z., Waldrip, H. 2016. Phosphorus concentrations in sequentially fractionated soil samples as affected by digestion methods [abstract]. In: ASA-CSSA-SSSA Annual Meeting. Nutrient Management & Soil & Plant Analysis Poster Session. November 18, 2015, Minneapolis, MN. 420-11.
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.
Legacy phosphorus in calcareous soils: effects of long-term poultry litter application on phosphorus distribution in Texas Blackland Vertisol -
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
Potential traceable markers of organic matter in organic and conventional dairy manure using ultraviolet–visible and solid-state 13C nuclear magnetic resonance spectroscopy -
He, Z., Zhang, M., Cao, X., Li, Y., Mao, J., Waldrip, H.M. 2015. Potential traceable markers of organic matter in organic and conventional dairy manure using ultraviolet–visible and solid-state 13C nuclear magnetic resonance spectroscopy. Organic Agriculture. 5:113-122.
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.
Composition of whole and water extractable organic matter of cattle manure affected by management practices -
He, Z., Waldrip, H. 2015. Composition of whole and water extractable organic matter of cattle manure affected by management practices. Soil Science Society of America Special Publication, Madison, WI. Book Chapter. 382(2015):41-60. doi:10.2136/sssaspecpub62.2014.0034.
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.
Biochar effects on phosphorus pools in three soils from Minnesota -
Pagliari, P., Waldrip, H., Strock, J., Roiger, A. 2014. Biochar effects on phosphorus pools in three soils from Minnesota. ASA-CSSA-SSSA Proceedings. 99-12.
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.
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.
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.
Methane emissions from a beef cattle feedyard: measurements and models -
Soil amino compound and carbohydrate contents influenced by organic amendments -
He, Z., Olk, D.C., Waldrip, H.M. 2014. Soil amino compound and carbohydrate contents influenced by organic amendments. In: He, Z., Zhang, H., editors. Applied Manure and Nutrient Chemistry for Sustainable Agriculture and Environment. Amsterdam, the Netherlands: Springer. p. 69-82.
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.
Effects of long-term poultry litter application on inorganic and enzyme hydrolyzable P of Texas Blackland Vertisol -
Pagliari, P., Waldrip, H., He, Z., Harmel, R.D., Zhang, M. 2013. Effects of long-term poultry litter application on inorganic and enzyme hydrolyzable P of Texas Blackland Vertisol. ASA-CSSA-SSSA Annual Meeting Abstracts. poster number 1016.
Impact of management practices on water extractable organic carbon and nitrogen from a poultry litter-amended soil -
Zhang, M., He, Z., Waldrip, H., Pagliari, P., Harmel, R.D. 2013. Impact of management practices on water extractable organic carbon and nitrogen from a poultry litter-amended soil. ASA-CSSA-SSSA Annual Meeting Abstracts. poster number 2733.
Phoshatase activities and their effects on phosphorus availability in soils amended with livestock manures -
Waldrip, H., Acosta Martinez, V. 2014. Phoshatase activities and their effects on phosphorus availability in soils amended with livestock manures. In: He, Z., Zhang, H., editors. Applied Manure and Nutrient Chemistry for Sustainable Agriculture and Environment. New York, NY: Springer Science+Media Dordrecht. p. 123-140.
Soil Enzyme Activities as Affected by Manure Types, Application Rates and Management Practices -
Acosta Martinez, V., Waldrip, H. 2014. Soil enzyme activities as affected by manure types, application rates and management practices. In: He, Z. and Zhang, H., editors. Applied Manure and Nutrient Chemistry for Sustainable Agriculture and Environment. New York, NY: Springer Science+Business Media Dordrecht. p. 99-122.
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.
Process models vs empirical models -
Waldrip, H. 2013. Process models vs empirical models. Western Dairy Air Quality Symposium. 1:1.
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.
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.
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.
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.
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.
Analysis of carbon functional groups in mobile humic acid and recalcitrant calcium humate extracted from eight US soils -
He, Z., Cao, X., Mao, J., Ohno, T., Waldrip, H.M. 2013. Analysis of carbon functional groups in mobile humic acid and recalcitrant calcium humate extracted from eight US soils. Pedosphere. 23(6):705-716.
Effects of organic dairy manure on soil phosphatase activity, available soil phosphorus, and growth of sorghum-sudangrass Reprint Icon -
Waldrip, H., He, Z., Griffin, T.S. 2012. Effects of organic dairy manure on soil phosphatase activity, available soil phosphorus, and growth of sorghum-sudangrass. Soil Science. 177(11):629-637.
Effects of organic dairy manure amendment on soil phosphatase activities -
Waldrip, H., Griffin, T.S., He, Z. 2012. Effects of organic dairy manure amendment on soil phosphatase activities. ASA-CSSA-SSSA Annual Meeting Abstracts. 1:1.
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.
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.
Estimation of ammonia emissions from beef cattle feedyards in the southern high plains with process-based modeling -
Capillary electrophoresis application in metal speciation and complexation characterization -
Wang, Y., He, Z., Waldrip, H.M. 2012. Capillary electrophoresis application in metal speciation and complexation characterization. In: He, Z., editor. Capillary Electrophoresis: Fundamentals, Techniques and Applications. New York, NY:Nova Science. p. 117-130.
Application of capillary electrophoresis in agricultural and soil chemistry research -
He, Z., Waldrip, H.M., Yun, W. 2012. Application of capillary electrophoresis in agricultural and soil chemistry research. In: He, Z., editor. Capillary Electrophoresis: Fundamentals, Techniques and Applications. New York, NY:Nova Science. p. 131-151.
Impacts of humic product application on yields of potato and other field crops -
Olk, D.C., Mosa, A.M., Waldrip, H. 2011. Impacts of humic product application on yields of potato and other field crops. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting. Oct. 16-19, 2011, San Antonio, TX. CD-ROM.
Effect of Poultry Manure Amendment on Soil Phosphatase Activity -
Waldrip, H., He, Z., Erich, M., Honeycutt, C.W. 2008. Effect of Poultry Manure Amendment on Soil Phosphatase Activity. Soil Science Society of America Annual Meeting. October 2008. CD-ROM.
Enzymatic Quantification of Phytate in Animal Manure -
He, Z., Waldrip, H., Erich, M., Honeycutt, C.W., Senwo, Z.N. 2009. Enzymatic Quantification of Phytate in Animal Manure. Communications in Soil Science and Plant Analysis. 40:566-575.
Soil Phosphorus Dynamics in Response to Poultry Manure Amendment -
Waldrip Dail, H.M., He, Z., Erich, M., Honeycutt, C.W. 2007. Soil Phosphorus Dynamics in Response to Poultry Manure Amendment. Soil Science Society of America Annual Meeting. CD-ROM
Enzymatic Quantification of Phytate in Poultry Manure -
He, Z., Waldrip Dail, H.M., Erich, M., Honeycutt, C.W., Senwo, Z.N. 2007. Enzymatic Quantification of Phytate in Poultry Manure. International Symposium on Soil and Plant Analysis. Page 54
EFFECTS OF DRYING ON PHOSPHORUS DISTRIBUTION IN POULTRY MANURE -
Waldrip Dail, H.M., He, Z., Erich, M.S., Honeycutt, C.W. 2007. Effects of drying on phosphorus distribution in poultry manure. Communications in Soil Science and Plant Analysis. 38:1879-1895