Heidi M Waldrip
(PhD)
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
(Employee information on this page comes from the REE Directory. Please contact your front office staff to update the REE Directory.)
Publications
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will take you to the publication reprint.)
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Legacy phosphorus in Alabama Hartsells soil after long-term amendment with broiler litter
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Waldrip, H., Thompson, T.N., Koziel, J.A., Watts, D.B., Torbert III, H.A. 2023. Legacy phosphorus in Alabama Hartsells soil after long-term amendment with broiler litter. Journal of Environmental Quality. 52(4):897-906. https://doi.org/10.1002/jeq2.20462.
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Condensed and hydrolyzable tannins for reducing methane and nitrous oxide emissions in dairy manure – a laboratory incubation study
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Min, B., Willis, W.M., Castleberry, B., Casey, K., Waldrip, H., Parker, D.B. 2022. Condensed and hydrolyzable tannins for reducing methane and nitrous oxide emissions in dairy manure – a laboratory incubation study. Animals. 12(20). Article 2876. https://doi.org/10.3390/ani12202876.
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Microbial community structure from southern high plains beef cattle feedyard manure and relationship with nitrous oxide emissions
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Waldrip, H., Parker, D., Miller, S., Durso, L.M., Miller, D.N., Casey, K., Woodbury, B.L., Spiehs, M.J. 2022. Microbial community structure from southern high plains beef cattle feedyard manure and relationship with nitrous oxide emissions. Agrosystems, Geosciences & Environment. 5(3). Article e20292. https://doi.org/10.1002/agg2.20292.
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Soil water extractable organic matter under long-term dryland cropping systems on the Texas High Plains
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Waldrip, H., Schwartz, R.C., He, Z., Todd, R.W., Baumhardt, R.L., Zhang, M., Parker, D.B., Brauer, D.K., Min, B. 2022. Soil water extractable organic matter under long-term dryland cropping systems on the Texas High Plains. Soil Science Society of America Journal. 1-15. https://doi.org/10.1002/saj2.20432.
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Temporal and spatial variability of methane emissions from Texas open-lot beef cattle feedyard pens
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Parker, D.B., Casey, K.D., Waldrip, H., Min, B., Woodbury, B.L., Spiehs, M.J., Campbell, T.N., Meyer, B.E., Willis, W.M. 2022. Temporal and spatial variability of methane emissions from Texas open-lot beef cattle feedyard pens. Transactions of the ASABE. 64(6):1781-1794. https://doi.org/10.13031/trans.14672.
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Environmental assessment of United States dairy farms
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Rotz, C.A., Stout, R.C., Leytem, A.B., Feyereisen, G.W., Waldrip, H., Thoma, G., Holly, M., Bjorneberg, D.L., Baker, J.M., Vadas, P.A., Kleinman, P.J. 2021. Environmental assessment of United States dairy farms. Journal of Cleaner Production. 315. Article 128153. https://doi.org/10.1016/j.jclepro.2021.128153.
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Antibiotic resistance, antimicrobial residues and bacterial community diversity in pasture-raised poultry, swine and beef cattle manures
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Rothrock Jr, M.J., Min, B., Castleberry, B., Waldrip, H., Parker, D.B., Brauer, D.K., Pitta, D., Indugu, N. 2021. Antibiotic resistance, antimicrobial residues and bacterial community diversity in pasture-raised poultry, swine and beef cattle manures. Journal of Animal Science. https://doi.org/10.1093/jas/skab144
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The potential role of two red seaweeds that promote anti-methanogenic activity and rumen fermentation profiles under laboratory conditions
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Environmental assessment of United States dairy farms
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Rotz, C.A., Stout, R.C., Leytem, A.B., Feyereisen, G.W., Waldrip, H., Thoma, G., Holly, M., Bjorneberg, D.L., Baker, J.M., Vadas, P.A., Kleinman, P.J. 2021. Environmental assessment of United States dairy farms[abstract]. American Dairy Science Association Abstracts. P.1.
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The effect of plant tannins on methane and nitrous oxide emissions from dairy manure under laboratory conditions
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Min, B., Parker, D.B., Casey, K., Willis, W.M., Castleberry, B., Meyer, B.E., Robbe, H.A., Waldrip, H. 2020. The effect of plant tannins on methane and nitrous oxide emissions from dairy manure under laboratory conditions [abstract]. 2020 ASAS-CSAS-WSASAS Virtual Annual Meeting and Trade Show. Paper No. PSXI-25.
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Prevalence of antibiotic resistance genes and bacterial community diversity from feces of pasture-raised broiler and layer chickens, swine, and beef cattle in the Southeastern USA
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Min, B., Castleberry, B., Rothrock Jr, M.J., Rutherford, L., Waldrip, H., Parker, D.B., Brauer, D.K., Pitta, D.W., Indugu, N. 2020. Prevalence of antibiotic resistance genes and bacterial community diversity from feces of pasture-raised broiler and layer chickens, swine, and beef cattle in the Southeastern USA [abstract]. 2020 ASAS-CSAS-WSASAS Virtual Annual Meeting and Trade Show. Paper No. PSXI-23.
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Dietary mitigation of enteric methane emissions from ruminants: A review of plant tannin mitigation options
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Min, B., Solaiman, S., Waldrip, H., Parker, D.B., Todd, R.W., Brauer, D.K. 2020. Dietary mitigation of enteric methane emissions from ruminants: A review of plant tannin mitigation options. Animal Nutrition. 6(3):231-246. https://doi.org/10.1016/j.aninu.2020.05.002.
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Toward modeling of nitrous oxide emissions following precipitation, urine and feces deposition on beef cattle feedyard surfaces
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Parker, D.B., Casey, K.D., Hales, K., Waldrip, H., Min, B., Cortus, E., Woodbury, B.L., Spiehs, M.J., Meyer, B.E., Willis, W.M. 2020. Toward modeling of nitrous oxide emissions following precipitation, urine and feces deposition on beef cattle feedyard surfaces. Transactions of the ASABE. 63(5):1371-1384. https://doi.org/10.13031/trans.13847.
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Preface of animal manure: production, characteristics, environmental concerns and management
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Pagliari, P., He, Z., Waldrip, H.M. 2020. Preface. In: Waldrip, H.M., Pagliari, P.H., He, Z., editors. Animal Manure: Production, Characteristics, Environmental Concerns and Management. ASA Special Publication 67. Madison, WI: ASA and SSSA. p. i-vii. https://doi.org/10.2134/asaspecpub67.frontmatter.
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Advances and outlook of manure production and management
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He, Z., Pagliari, P., Waldrip, H.M. 2020. Advances and outlook of manure production and management. In: Waldrip, H.M., Pagliari, P.H., He, Z., editors. Animal Manure: Production, Characteristics, Environmental Concerns and Management. ASA Special Publication 67. Madison, WI: ASA and SSSA. p. 373-383. https://doi.org/10.2134/asaspecpub67.c28.
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Selected soil antibiotic resistance gene profile changes following manure application and rainfall
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Meyers, M.A., Durso, L.M., Gilley, J.E., Waldrip, H., Castleberry, B., Millmier, S.A. 2020. Selected soil antibiotic resistance gene profile changes following manure application and rainfall. Environmental Quality. 49(3):754–761. https://doi.org/10.1002/jeq2.20060.
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Associative effects of wet distiller's grains, plus solubles and tannin-rich peanut skin supplementation on in vitro rumen fermentation, greenhouse gas emissions, and microbial changes
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Min, B., Castleberry, B., Allen, H.K., Parker, D.B., Waldrip, H., Brauer, D.K., Willis, W.M. 2019. Associative effects of wet distiller's grains, plus solubles and tannin-rich peanut skin supplementation on in vitro rumen fermentation, greenhouse gas emissions, and microbial changes. Journal of Animal Science. 97(11):4668-4681. https://doi.org/10.1093/jas/skz317.
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Nitrous oxide emissions from an open-lot beef cattle feedyard in Texas
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Parker, D.B., Casey, K.D., Waldrip, H.M., Min, B.R., Woodbury, B.L., Spiehs, M.J., Willis, W. 2019. Nitrous oxide emissions from an open-lot beef cattle feedyard in Texas. Transactions of the ASABE. 62(5):1173-1183. https://doi.org/10.13031/trans.13396.
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How does long-term crop management affect soil organic matter in the Texas High Plains?
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Waldrip, H., Schwartz, R.C., He, Z., Todd, R.W., Baumhardt, R.L., Parker, D.B., Zhang, M. 2019. How does long-term crop management affect soil organic matter in the Texas High Plains? [abstract]. 74th SWCS International Annual Conference, July 28-31, 2019, Pittsburg, Pennsylvania. Paper No. 14.
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Modern animal manure management: production, characteristics, and environmental concerns
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Waldrip, H., He, Z., Pagliari, P. 2019. Modern animal manure management: production, characteristics, and environmental concerns [abstract]. ASA-CSSA-SSSA International Annual Meeting, November 10-13, 2019, San Antonio, TX. Paper No. 40-5.
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Nitrogen and phosphorus characteristics of beef and dairy manure
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Pagliari, P., Wilson, M., Waldrip, H., He, Z. 2019. Nitrogen and phosphorus characteristics of beef and dairy manure. In: Waldrip, H.M., Pagliari, P.H., He, Z., editors. Animal Manure: Production, Characteristics, Environmental Concerns, and Management. ASA Special Publication 67. Madison, WI: American Society of Agronomy and Soil Science Society of America. p. 45-62.
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Associative effect of wet-distiller's grain plus soluble and tannin-rich peanut skin supplementation on in vitro rumen fermentation, greenhouse gas emissions, and microbiome changes
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Empirical model of annual nitrous oxide emissions from open-lot beef cattle feedyard pens (Version 2)
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Parker, D.B., Casey, K.D., Cortus, E.L., Min, B., Waldrip, H., Woodbury, B.L., Spiehs, M.J. 2019. Empirical model of annual nitrous oxide emissions from open-lot beef cattle feedyard pens (Version 2). In: Proceedings of the 2019 ASABE Annual International Meeting, July 5-7, 2019, Boston, Massachusetts. Paper No. 1900299. p. 1-18.
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Whole farm modeling: A systems approach to understanding and managing livestock for greenhouse gas mitigation, economic viability and environmental quality
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Ahmed, M., Ahmad, S., Waldrip, H., Ramin, M., Raza, M. 2019. Whole farm modeling: A systems approach to understanding and managing livestock for greenhouse gas mitigation, economic viability and environmental quality. In: Waldrip, H.M., Pagliari, P.H., He, Z., editors. Animal Manure: Production, Characteristics, Environmental Concerns, and Management. ASA Special Publication 67. Madison, WI: American Society of Agronomy and Soil Science Society of America. p. 345-371.
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Balancing personal-professional responsibilities
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Sengupta, A., Waldrip, H. 2018. Balancing personal-professional responsibilities. CSA News. 63(12):36-38. https://doi.org/10.2134/csa2018.63.1226.
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Nitrous oxide from beef cattle feedyards: Understanding effects of microbial community structure, climate and manure properties
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Diurnal measurements of methane emissions from a feedyard pen surface in Texas during Spring
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Empirical model of annual nitrous oxide emissions from open-lot beef cattle feedyard pens in the southern high plains
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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.
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Tetracycline and sulfonamide antibiotic resistance genes in soils from Nebraska organic farming operations
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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.
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How do temperature and rainfall affect nitrous oxide emissions from open-lot beef cattle feedyard pens?
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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.
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Identifying challenges and opportunities for improved nutrient management through U.S.D.A's Dairy Agroecosystem Working Group
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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.
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Identifying challenges and opportunities for improved nutrient management through U.S.D.A's Dairy Agroecosystem Working Group
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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.
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Nitrous oxide from beef cattle feedyards: Understanding effects of microbial community structure, climate and manure properties on denitrification
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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.
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Phosphorus distribution in soils treated with bioenergy co-product materials following corn growth
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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.
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Unscrambling nitrous oxide production in beef cattle feedyard manure: Effect of temperature and water content on denitrification rates
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Impact of management practices on water extractable organic carbon and nitrogen from 12-year poultry litter amended soils
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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.
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Temporal nitrous oxide emissions from beef cattle feedlot manure following a simulated rainfall event
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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.
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Nitrous oxide emissions from southern high plains beef cattle feedyards: Measurement and Modeling
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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.
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How well do we understand nitrous oxide emissions from open-lot cattle systems?
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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.
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Diurnal variation in greenhouse fluxes from a feedyard pen surface
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Improved chamber systems for rapid, real-time nitrous oxide emissions from manure and soil
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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.
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Spatial variability in nitrous oxide and methane emissions from beef cattle feedyard pen surfaces
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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.
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Applied and environmental chemistry of animal manure: A review
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He, Z., Pagliari, P.H., Waldrip, H.M. 2016. Applied and environmental chemistry of animal manure: A review. Pedosphere. 26:779-816.
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Urease inhibitor for reducing ammonia emissions from an open-lot beef cattle feedyard in the Texas High Plains
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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.
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Nitrous oxide emissions from open-lot cattle feedyards: A review
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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.
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Reactive N emissions from beef cattle feedlots
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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.
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Estimating emissions from beef and dairy production systems
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Waldrip, H. 2016. Estimating emissions from beef and dairy production systems. ENVR 3092/6092 Fundamentals of Air Quality. Meeting Abstract. CDROM.
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Phosphorus concentrations in sequentially fractionated soil samples as affected by digestion methods
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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.
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Legacy phosphorus in calcareous soils: effects of long-term poultry litter application
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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.
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Predicting greenhouse gas emissions from beef cattle feedyard manure
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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.
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Legacy phosphorus in calcareous soils: Effects of long-term poultry litter application
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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.
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Phosphorus concentrations in sequentially fractionated soil samples as affected by digestion methods
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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.
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Nitrogen sustainability and beef cattle feedyards: II. Ammonia emissions
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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.
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Process-based modeling of ammonia and nitrous oxide emissions from open lot beef and dairy facilities
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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.
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Legacy phosphorus in calcareous soils: effects of long-term poultry litter application on phosphorus distribution in Texas Blackland Vertisol
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Ammonia and nitrous oxide model for open lot cattle production systems
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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.
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Nitrogen sustainability and beef cattle feedyards: introduction and influence of pen surface conditions and diet
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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
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Potential traceable markers of organic matter in organic and conventional dairy manure using ultraviolet–visible and solid-state 13C nuclear magnetic resonance spectroscopy
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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.
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Organic and inorganic soil phosphorus after long-term poultry litter amendment: effects of litter rate and land-use type
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Can surface-applied zeolite reduce ammonia losses from feedyard manure? A laboratory study
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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.
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Composition of whole and water extractable organic matter of cattle manure affected by management practices
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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.
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Towards sustainability: nitrogen emissions from beef feedyards
- (Literature Review)
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Predicting greenhouse gas emissions from beef cattle feedyard manure
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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.
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Can surface-applied zeolite reduce ammonia losses from feedyard manure? A laboratory study
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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.
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Greenhouse gas emissions from beef cattle feedlot pen surfaces in Texas
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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.
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Biochar effects on phosphorus pools in three soils from Minnesota
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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.
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Nutrient management and environmental and societal issues affecting sustainability of feedlot finishing systems
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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.
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Mitigating greenhouse gas emissions from beef cattle housing
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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.
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Methane emissions from a beef cattle feedyard during winter and summer on the southern High Plains of Texas
- (Peer Reviewed Journal)
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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.
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Process-based modeling of ammonia emission from beef cattle feedyards with the integrated farm systems model
- (Peer Reviewed Journal)
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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.
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Methane emissions from a beef cattle feedyard: measurements and models
- (Other)
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Soil amino compound and carbohydrate contents influenced by organic amendments
- (Book / Chapter)
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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.
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Greenhouse gas emissions from cattle systems: factors affecting emissions and mitigation strategies
- (Abstract Only)
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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.
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Feed management for beef feedlots to reduce air emissions
- (Other)
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Characterization of organic matter in beef feedyard manure by Ultraviolet-Visible and Fourier transform infrared spectroscopies
- (Peer Reviewed Journal)
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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.
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Characterization of organic matter in beef feedyard manure by ultraviolet-visible and Fourier transform infrared spectroscopies
- (Abstract Only)
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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.
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Impact of management practices on water extractable organic carbon and nitrogen from a poultry litter-amended soil
- (Abstract Only)
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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.
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Effects of long-term poultry litter application on inorganic and enzyme hydrolyzable P of Texas Blackland Vertisol
- (Abstract Only)
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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.
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Phoshatase activities and their effects on phosphorus availability in soils amended with livestock manures
- (Book / Chapter)
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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.
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Soil Enzyme Activities as Affected by Manure Types, Application Rates and Management Practices
- (Book / Chapter)
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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.
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Greenhouse gas emissions from beef cattle feedlot pen surfaces in
Texas during fall
- (Abstract Only)
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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.
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Prediction of nitrogen excretion by beef cattle: a meta-analysis
- (Peer Reviewed Journal)
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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.
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Estimation of ammonia emissions from beef cattle feedyards using process-based model manure-dndc
- (Peer Reviewed Journal)
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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.
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Process models vs empirical models
- (Proceedings)
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Waldrip, H. 2013. Process models vs empirical models. Western Dairy Air Quality Symposium. 1:1.
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Ammonia emissions from open lot dairies: lessons learned from beef cattle feedyards
- (Proceedings)
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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.
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Nutrient management and environmental and societal issues affecting sustainability of feedlot finishing systems
- (Abstract Only)
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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.
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Estimation of ammonia emissions from two commercial beef cattle feedyards in the southern high plains with process-based models
- (Proceedings)
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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.
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Ammonia emissions and emission factors: a summary of investigations at beef cattle feedyards on the southern high plains
- (Proceedings)
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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.
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Arrhenius equation for modeling feedyard ammonia emissions using temperature and diet crude protein
- (Peer Reviewed Journal)
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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.
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Estimation of ammonia emissions from two commercial beef cattle feedyards in the southern high plains with process-based modeling.
- (Abstract Only)
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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.
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Analysis of carbon functional groups in mobile humic acid and recalcitrant calcium humate extracted from eight US soils
- (Peer Reviewed Journal)
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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.
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Effects of organic dairy manure on soil phosphatase activity, available soil phosphorus, and growth of sorghum-sudangrass
- (Peer Reviewed Journal)
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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.
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Effects of organic dairy manure amendment on soil phosphatase activities
- (Abstract Only)
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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.
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Estimation of ammmonia emissions from beef cattle feedyards in the Southern Plains with process-based modeling
- (Abstract Only)
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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.
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Characterization of ammonium sorption by beef feedyard manure
- (Peer Reviewed Journal)
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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.
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Estimation of ammonia emissions from beef cattle feedyards in the southern high plains with process-based modeling
- (Abstract Only)
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Capillary electrophoresis application in metal speciation and complexation characterization
- (Book / Chapter)
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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.
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Application of capillary electrophoresis in agricultural and soil chemistry research
- (Book / Chapter)
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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.
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Impacts of humic product application on yields of potato and other field crops
- (Abstract Only)
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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.
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Effect of Poultry Manure Amendment on Soil Phosphatase Activity
- (Abstract Only)
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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.
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Enzymatic Quantification of Phytate in Animal Manure
- (Peer Reviewed Journal)
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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.
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Soil Phosphorus Dynamics in Response to Poultry Manure Amendment
- (Abstract Only)
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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
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Enzymatic Quantification of Phytate in Poultry Manure
- (Abstract Only)
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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
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EFFECTS OF DRYING ON PHOSPHORUS DISTRIBUTION IN POULTRY MANURE
- (Peer Reviewed Journal)
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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
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