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                    U.S. DEPARTMENT OF AGRICULTURE
 Soil Management and Sugarbeet Research: Fort Collins, CO
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ARS Home Plains Area Fort Collins, Colorado Center for Agricultural Resources Research Soil Management and Sugarbeet Research People & Locations







Jorge A Delgado
                        Soil Management and Sugarbeet Research

                        




                        
                        Research Soil Scientist
                        Phone: (970) 492-7260
                        
                        
                        Fax: (970) 492-7213(Employee information on this page comes from the REE Directory. Please contact your front office staff to update the REE Directory.)
                            ProjectsAgricultural Management for Long-Term Sustainability and Soil Health
                                                    In-House Appropriated
                                                                    (D)Accession Number: 441360NextGenEEF: Evaluation and Testing of Biodegradable Enhanced Efficiency Fertilizers
                                                    Non-Assistance Cooperative Agreement
                                                                    (S)Accession Number: 440593DayCent Model Development and Enhanced Efficiency Fertilizer Assessment
                                                    Non-Assistance Cooperative Agreement
                                                                    (S)Accession Number: 440605**Publications**
                                                (Clicking on the reprint icon
                                                    Reprint Icon
                                                    will take you to the publication reprint.)Global change impacts on mineral nutritional quality of cereal grains: Coordinated datasets and analyses to advance a systems-based understanding
                                                        

- (Peer Reviewed Journal)Miner, G.S., Stewart, C.E., Delgado, J.A., Ippolito, J.A., Mason, R.E., Haley, S.D., Guttieri, M.J., Ainsworth, E.A., McGrath, J.M., Beebout, S.E. 2024. Global change impacts on mineral nutritional quality of cereal grains: Coordinated datasets and analyses to advance a systems-based understanding. Field Crops Research. 310. Article e109338. https://doi.org/10.1016/j.fcr.2024.109338.Soil bacteriome resilience and reduced nitrogen toxicity in tomato by controlled release nitrogen fertilizer compared to urea
                                                        

- (Peer Reviewed Journal)Rohrbaugh, C.R., Dixon, M.M., Delgado, J.A., Manter, D.K., Vivanco, J.M. 2023. Soil bacteriome resilience and reduced nitrogen toxicity in tomato by controlled release nitrogen fertilizer compared to urea. Applied Microbiology. 3(4):1262-1276. https://doi.org/10.3390/applmicrobiol3040087.Long-term nitrogen balance of an irrigated no-till soil-corn system
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Halvorson, A.D., D'Adamo, R.E., Stewart, C.E., Floyd, B.A., Del Grosso, S.J. 2023. Long-term nitrogen balance of an irrigated no-till soil-corn system. Nutrient Cycling in Agroecosystems. 126:229-243. https://doi.org/10.1007/s10705-023-10287-9.Nitrogen management can increase potato yields and food security for climate change adaptation in the Andean region
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Barrera, V.H., Alwang, J.R., Cartagena, Y.E., Escudero, L.O., Neer, D.L., D'Adamo, R.E., Zapata, A.C. 2023. Nitrogen management can increase potato yields and food security for climate change adaptation in the Andean region. American Journal of Potato Research. https://doi.org/10.1007/s12230-023-09912-8.Potential to use narrow rows and plant populations to maximize harvested grain or silage production while increasing irrigated water and nitrogen use efficiencies in irrigated systems

- (Abstract Only)Delgado, J.A., Floyd, B.A., Brandt, A.D., D'Adamo, R.E. 2022. Potential to use narrow rows and plant populations to maximize harvested grain or silage production while increasing irrigated water and nitrogen use efficiencies in irrigated systems. In: Elevating Conservation to New Heights Abstract Book. 77th SWCS International Annual Conference, July 31-August 3, 2022, Denver, Colorado. p. 157.2021 Colorado winter wheat variety performance trials

- (Research Technical Update)Jones-Diamond, S., Johnson, J., Mason, E., Asfeld, E., Stromberger, J., Tyler, R., Meyer, R., Trujillo, W., Kaan, D., Ballard, T., Fickenscher, B., Larson, K., Mankin, K.R., Pettinger, B., Nachappa, P., Peirce, E., Roberts, R., LoGrasso, O., Pottorff, L., Miner, G.S., Delgado, J.A., Ippolito, J., Kluth, D., Stewart, C.E., Erker, B., Westra, E., Gaines, T. 2022. 2021 Colorado winter wheat variety performance trials. Technical Report TR 21-3 2021 Wheat Field Days Edition. Fort Collins, CO: Colorado State University Extension. 56p.Effects of climate change and narrow rows with higher plant densities on yields of irrigated corn

- (Abstract Only)Wheat grain micronutrients and relationships with yield and protein in the U.S. Central Great Plains
                                                        

- (Peer Reviewed Journal)Miner, G.S., Delgado, J.A., Ippolito, J.A., Johnson, J.J., Kluth, D., Stewart, C.E. 2022. Wheat grain micronutrients and relationships with yield and protein in the U.S. Central Great Plains. Field Crops Research. 279. Article e108453. https://doi.org/10.1016/j.fcr.2022.108453.Use of narrow rows in sprinkler-irrigated corn systems to increase grain yields, aboveground biomass, and water and nitrogen use efficiencies
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Floyd, B.A., Brandt, A.D., D'Adamo, R.E. 2021. Use of narrow rows in sprinkler-irrigated corn systems to increase grain yields, aboveground biomass, and water and nitrogen use efficiencies. Agronomy. 12(1). Article e82. https://doi.org/10.3390/agronomy12010082.Biochemistry and distribution of deep soil C under conservation management

- (Abstract Only)Effects of climate change on irrigated corn systems in Colorado and the potential to adapt using management practices

- (Abstract Only)Effects of nitrogen rates and tillage treatments on irrigated corn yields and nitrogen budgets, cycling, and use efficiencies

- (Abstract Only)Partnerships for Data Innovations (PDI): Facilitating data stewardship and catalyzing research engagement in the digital age
                                                        

- (Peer Reviewed Journal)Harmel, R.D., Kleinman, P.J., Eve, M.D., Ippolito, J.A., Beebout, S.E., Delgado, J.A., Vandenberg, B.C., Buser, M.D. 2021. Partnerships for Data Innovations (PDI): Facilitating data stewardship and catalyzing research engagement in the digital age. Agricultural & Environmental Letters. 6. Article e20055. https://doi.org/10.1002/ael2.20055.Conservation agriculture can help the South American Andean region achieve food security
                                                        

- (Peer Reviewed Journal)Barrera, V.H., Delgado, J.A., Alwang, J. 2021. Conservation agriculture can help the South American Andean region achieve food security. Agronomy Journal. 113(6):4494-4509. https://doi.org/10.1002/agj2.20879.Narrow rows are a potential management tool to increase grain yields, total biomass, and water and nitrogen use efficiencies in irrigated systems

- (Abstract Only)Delgado, J.A., Floyd, B.A., Brandt, A.D., D'Adamo, R.E. 2021. Narrow rows are a potential management tool to increase grain yields, total biomass, and water and nitrogen use efficiencies in irrigated systems. Soil and Water Conservation Society Proceedings. p. 152.Historical technological advances in soil and water conservation from the 1930s to the present

- (Abstract Only)Delgado, J.A. 2021. Historical technological advances in soil and water conservation from the 1930s to the present. Soil and Water Conservation Society Proceedings. p. 47.Water quality

- (Book / Chapter)Delgado, J.A. 2020. Water Quality. In: Delgado, J.A., Gantzer, C.J., Sassenrath, G.F., editors. Soil and Water Conservation: A Celebration of 75 Years. Ankeny, IA: Soil and Water Conservation Society. p. 123-139.Soil and water conservation: A celebration of 75 years

- (Book / Chapter)Delgado, J.A., Gantzer, C.J., Sassenrath, G.F. 2020. Soil and water conservation: A celebration of 75 years. Ankeny, IA: Soil and Water Conservation Society. 331 p.The future of soil, water, and air conservation

- (Book / Chapter)Delgado, J.A., Gantzer, C.J., Sassenrath, G.F. 2020. The future of soil, water, and air conservation. In: Delgado, J.A., Gantzer, C.J., Sassenrath, G.F., editors. Soil and Water Conservation: A Celebration of 75 Years. Ankeny, IA: Soil and Water Conservation Society. p. 307-331.Estimating economically optimal levels of nitrogen fertilizer in no-tillage continuous corn
                                                        

- (Peer Reviewed Journal)Villacis, A.H., Ramsey, F.A., Delgado, J.A., Alwang, J.R. 2020. Estimating economically optimal levels of nitrogen fertilizer in no-tillage continuous corn. Journal of Agricultural and Applied Economics. 52(4):613-623. https://doi.org/10.1017/aae.2020.23.Recent advances in AgCROS, a network of networks that could contribute to assessments of conservation practices across the USA and internationally

- (Abstract Only)Delgado, J.A., Vandenberg, B.C., D'Adamo, R.E., Marquez, R.D., Neer, D.L., Kaplan, N.E., Carter, J.D., Wilson, G.J., Zoch, G., Messinger, L., Nezat, C.J., Strom, T., Buser, M.D. 2020. Recent advances in AgCROS, a network of networks that could contribute to assessments of conservation practices across the USA and internationally [abstract]. Soil and Water Conservation Society 75th International Annual Conference, July 27-29, 2020. Virtual event. Abstract Book.Prácticas de agricultura de conservación promueven la productividad y sostenibilidad del sistema de producción papa-pastos en la microcuenca del río Illangama, Ecuador

- (Research Technical Update)Barrera, V., Delgado, J.A., Alwang, J., Escudero, L., Arévalo, J., Cartagena, Y. 2020. Prácticas de agricultura de conservación promueven la productividad y sostenibilidad del sistema de producción papa-pastos en la microcuenca del río Illangama, Ecuador. Agricultural Research Service Station Bulletin. 448:10-38.Soil health management practices and crop productivity
                                                        

- (Peer Reviewed Journal)Miner, G., Delgado, J.A., Ippolito, J., Stewart, C.E. 2020. Soil health management practices and crop productivity. Agricultural and Environmental Letters. https://doi.org/10.1002/ael2.20023.Potential use of cover crops for soil and water conservation, nutrient management, and climate change adaptation across the tropics
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Barrera Mosquera, V.H., Alwang, J.R., Villacís Aveiga, A., Cartagena Ayala, Y.E., Neer, D.L., Monar, C., Escudero López, L.O. 2020. Potential use of cover crops for soil and water conservation, nutrient management, and climate change adaptation across the tropics. Advances in Agronomy. 165:175-247. https://doi.org/10.1016/bs.agron.2020.09.003.Assessment of long-term effects of tillage and nitrogen management practices on irrigated corn yields and nitrogen use efficiencies

- (Proceedings)Delgado, J.A., Halvorson, A.D., Villacis-Aveiga, A., Del Grosso, S.J., Stewart, C.E., Manter, D.K., Alwang, J., Floyd, B.A., D'Adamo, R.E., Miner, G. 2020. Assessment of long-term effects of tillage and nitrogen management practices on irrigated corn yields and nitrogen use efficiencies. In: Schlegel, A.J., editors. Proceedings of Great Plains Soil Fertility Conference, March 10-11, 2020, Denver, Colorado. p. 14-18.Nitrogen fertilization and long-term no tillage impacts on soil properties and deep soil c storage under irrigation

- (Proceedings)Stewart, C.E., Manter, D.K., Delgado, J.A., Del Grosso, S.J., Calderon, F.J., Heckman, K., Snell, K. 2020. Nitrogen fertilization and long-term no tillage impacts on soil properties and deep soil c storage under irrigation. Proceedings Great Plains Soil Fertility Conference.Observational and modeling methods to inform ecosystem service markets

- (Proceedings)Del Grosso, S.J., Stewart, C.E., Delgado, J.A., Manter, D.K., Vigil, M.F. 2020. Observational and modeling methods to inform ecosystem service markets. Proceedings Great Plains Soil Fertility Conference. 18:1-265.Nitrogen (nitrate leaching) index
                                                        

- (Peer Reviewed Journal)Delgado, J.A. 2020. Nitrogen (nitrate leaching) index. International Soil and Water Conservation Research. https://doi.org/10.1201/9781003045045-43.Nitrogen (nutrient) trading tool
                                                        

- (Peer Reviewed Journal)Delgado, J.A. 2020. Nitrogen (nutrient) trading tool. International Soil and Water Conservation Research. https://doi.org/10.1201/9781003045045-44.Potential use of a new nitrogen trading tool to assess nitrogen management practices to protect groundwater quality
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Ascough II, J.C., Lighthart, N.P., Neer, D.L. 2020. Potential use of a new nitrogen trading tool to assess nitrogen management practices to protect groundwater quality. Computers and Electronics in Agriculture. 169:105195. https://doi.org/10.1016/j.compag.2019.105195.Assessing manure and inorganic nitrogen fertilization impacts on soil health, crop productivity, and crop quality in a continuous maize agroecosystem
                                                        

- (Peer Reviewed Journal)Miner, G.L., Delgado, J.A., Ippolito, J.A., Stewart, C.E., Manter, D.K., Del Grosso, S.J., Floyd, B.A., D Adamo, R.E. 2020. Assessing manure and inorganic nitrogen fertilization impacts on soil health, crop productivity, and crop quality in a continuous maize agroecosystem. Journal of Soil and Water Conservation. 75(4):481-498. https://doi.org/10.2489/jswc.2020.00148.Emerging nutrient management databases and networks of networks will have broad applicability in future machine learning and artificial intelligence applications in soil and water conservation
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Vandenberg, B.C., Neer, D.L., D Adamo, R.E. 2019. Emerging nutrient management databases and networks of networks will have broad applicability in future machine learning and artificial intelligence applications in soil and water conservation. Journal of Soil and Water Conservation. 74(6):113A-118A. https://doi.org/10.2489/jswc.74.6.113A.Conservation agriculture increases yields and economic returns
of potato, forage, and grain systems of the Andes
                                                        

- (Peer Reviewed Journal)Barrera, V., Delgado, J.A., Alwang, J., Escudero, L., Cartagena, Y., Dominquez, J., D Adamo, R.E. 2019. Conservation agriculture increases yields and economic returns of potato, forage, and grain systems of the Andes. Agronomy Journal. 111:2747-2753. https://doi.org//10.2134/agronj2019.04.0280.Nitrogen Loss and Environmental Assessment Package (NLEAP GIS 5.0): User Guide

- (Other)Ascough Ii, J.C., Delgado, J.A., Lighthart, N.P., Neer, D.L. 2019. Nitrogen Loss and Environmental Assessment Package (NLEAP GIS 5.0): User Guide. Ag Data Commons. https://data.nal.usda.gov/dataset/nleap-gis-50.Nitrogen Loss and Environmental Assessment Package (NLEAP GIS 5.0): Model

- (Other)Ascough Ii, J.C., Delgado, J.A., Lighthart, N.P., Neer, D.L., Tebbe, C.R., Shaffer, M.J. 2019. Nitrogen Loss and Environmental Assessment Package (NLEAP GIS 5.0): Model. Ag Data Commons. https://data.nal.usda.gov/dataset/nleap-gis-50.Big data analysis for sustainable agriculture
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Short, N.M., Roberts, D.P., Vandenberg, B.C. 2019. Big data analysis for sustainable agriculture. Frontiers in Sustainable Food Systems. https://doi.org/10.3389/fsufs.2019.00054.Assessment of long-term effects of different nitrogen and tillage management practices on irrigated corn yields and nitrogen uptake

- (Abstract Only)Delgado, J.A., Halvorson, A.D., Villacis-Aveiga, A., Del Grosso, S.J., Stewart, C.E., Manter, D.K., Alwang, J., Floyd, B.A., D Adamo, R.E., Miner, G. 2019. Assessment of long-term effects of different nitrogen and tillage management practices on irrigated corn yields and nitrogen uptake. Soil and Water Conservation Society Proceedings.Manure versus Inorganic N Fertilization: An Assessment of Amendment Impacts on Soil Health and Crop Quality

- (Abstract Only)Miner, G., Delgado, J.A., Ippolito, J.A., Stewart, C.E., Manter, D.K., Del Grosso, S.J., Floyd, B.A., D Adamo, R.E. 2019. Manure versus Inorganic N Fertilization: An Assessment of Amendment Impacts on Soil Health and Crop Quality. Soil and Water Conservation Society Proceedings.Conservation agriculture increases profits in an Andean region of South America
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Barrera Mosquera, V.H., Escudero López, L.O., Cartagena Ayala, Y.E., Alwang, J.R., Stehouwer, R.C., Arévalo Tenelema, J.C., D Adamo, R.E., Domínguez Andrade, J.M., Valverde, F., Alvarado Ochoa, S.P. 2019. Conservation agriculture increases profits in an Andean region of South America. Agrosystems, Geosciences & Environment. 2(1):1-8. https://doi.org/10.2134/age2018.10.0050.Data management infrastructure: building elements at Central Plains

- (Abstract Only)Kaplan, N.E., Derner, J.D., Vandenberg, B.C., Delgado, J.A., Augustine, D.J., Hoover, D.L., Smith, D.P., Gaffney, R.M. 2019. Data management infrastructure: building elements at Central Plains. Meeting Abstract. Not published.Agricultural Collaborative Research Outcomes System: AgCROS - An emerging network of networks for national food and environmental security and human health
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Vandenberg, B.C., Kaplan, N.E., Neer, D.L., Wilson, G.J., D Adamo, R.E., Carter, J.D., Ogan, L., Grow, N.O., Marquez, R.D., Arthur, D.K., Eve, M.D., Del Grosso, S.J., Johnson, J.M., Karlen, D.L., Durso, L.M., Finley, J.W., Acosta Martinez, V., Harmel, R.D., Derner, J.D. 2018. Agricultural Collaborative Research Outcomes System: AgCROS - An emerging network of networks for national food and environmental security and human health. Journal of Soil and Water Conservation. 73(6):158A-164A. https://doi.org/10.2489/jswc.73.6.158A.Long-term nitrogen fertilization rates affect crop micronutrient concentrations but not soil micronutrient availability
                                                        

- (Peer Reviewed Journal)Miner, G.L., Delgado, J.A., Ippolito, J.A., Barbarick, K.A., Stewart, C.E., Manter, D.K., Del Grosso, S.J., Halvorson, A.D., Floyd, B.A., D Adamo, R.E. 2018. Long-term nitrogen fertilization rates affect crop micronutrient concentrations but not soil micronutrient availability. Field Crops Research. 228:170-182. https://doi.org/10.1016/j.fcr.2018.08.017.Precision Conservation:  Geospatial Techniques for Agricultural and Natural Resources

- (Monograph)Delgado, J.A., Sassenrath, G.F., Mueller, T. 2018. Precision Conservation:  Geospatial Techniques for Agricultural and Natural Resources. Crop Science Society of America Monograph, 384 p.Precision conservation and precision regulation

- (Book / Chapter)Sassenrath, G.F., Delgado, J.A. 2018. Precision conservation and precision regulation. In: Delgado, J.A., Sasenrath, G.F., Mueller, T., editors. Precision Conservation: Geospatial Techniques for Agricultural and Natural Resources Conservation. Madison, WI: American Society of Agronomy and Crop Science Society of America, Inc. p. 361-384.Long-Term nitrogen fertilization rates affect crop micronutrient concentrations but not soil micronutrient availability

- (Abstract Only)Potential use of tillage, crop residue, and nitrogen management for soil and water conservation, higher yields, and increased economic returns in cropping systems of the Andes

- (Abstract Only)Nitrous oxide and ammonia emissions from cattle excrement on C3 pasture and C4-dominated shortgrass steppe
                                                        

- (Peer Reviewed Journal)Nichols, K.L., Del Grosso, S.J., Derner, J.D., Follett, R.F., Archibeque, S., Delgado, J.A., Paustian, K. 2018. Nitrous oxide and ammonia emissions from cattle excrement on C3 pasture and C4-dominated shortgrass steppe. Journal of Environmental Quality. 47:419–426. doi:10.2134/jeq2017.12.0463.Soil carbon pools in dryland agroecosystems as impacted by several years of drought
                                                        

- (Peer Reviewed Journal)Sherrod, L.A., McMaster, G.S., Delgado, J.A., Schipanski, M.E., Fonte, S.J., Montenieri, R.L., Larson, K. 2018. Soil carbon pools in dryland agroecosystems as impacted by several years of drought. Journal of Environmental Quality. doi:10.2134/jeq2017.09.0371.Potential to use nitrogen management practices to increase yields and nitrogen use efficiencies in the Northern Plains

- (Proceedings)Integrated soil health management: A framework for soil health, conservation and regeneration

- (Book / Chapter)Manter, D.K., Delgado, J.A., Moore-Kucera, J. 2018. Integrated soil health management: A framework for soil health, conservation and regeneration. In: Reicosky, D. Managing Soil Health for Sustainable Agriculture, Volume 2. Sawston, Cambridge: Burleigh Dodds Science Publishing Limited. p.69-87.Interactions of stover and nitrogen management on soil microbial community and labile carbon under irrigated no-till corn
                                                        

- (Peer Reviewed Journal)Stewart, C.E., Roosendaal, D.L., Manter, D.K., Delgado, J.A., Del Grosso, S.J. 2018. Interactions of stover and nitrogen management on soil microbial community and labile carbon under irrigated no-till corn. Soil Science Society of America Journal. doi:10.2136/sssaj2017.07.0229.A new concept: national living soil repository
                                                        

- (Peer Reviewed Journal)Manter, D.K., Delgado, J.A., Blackburn, H.D., Harmel, R.D., Perez De Leon, A.A., Honeycutt, C.W. 2017. A new concept: national living soil repository. Proceedings of the National Academy of Sciences. 114:13587–13590. https://doi.org/10.1073/pnas.1720262115.The Potential of the Nutrient Uptake and Outcome network (NUOnet) to 
Contribute to Soil and Water Conservation

- (Abstract Only)Nutrient Uptake and Outcome network (NUOnet): Connecting a Wide Range of Natural Resource Conservation Networks

- (Abstract Only)Long-term N fertilization and conservation tillage practices conserve surface but not profile SOC stocks under semi-arid irrigated corn

- (Peer Reviewed Journal)Stewart, C.E., Halvorson, A.D., Delgado, J.A. 2017. Long-term N fertilization and conservation tillage practices conserve surface but not profile SOC stocks under semi-arid irrigated corn. Soil & Tillage Research. 171:9–18. doi:10.1016/j.still.2017.04.003.Effect of management on nitrogen budgets and implications for air, soil, and water quality

- (Proceedings)Delgado, J.A. 2017. Effect of management on nitrogen budgets and implications for air, soil, and water quality. Western Nutrient Management Conference Proceedings. P. 1-9.The new Caribbean Nitrogen Index to assess nitrogen dynamics in vegetable production systems in southwestern Puerto Rico

- (Peer Reviewed Journal)Oliveras-Berrocales, M., Sotomayer-Ramirez, D., Delgado, J.A., Perez-Alegria, L.R. 2017. The new Caribbean Nitrogen Index to assess nitrogen dynamics in vegetable production systems in southwestern Puerto Rico. International Soil and Water Conservation Research. 5:69-75. doi:10.1016/j.iswcr.2017.01.001.USDA Agricultural Research Service creates Nutrient Uptake and Outcome Network (NUOnet)
                                                        

- (Peer Reviewed Journal)Delgado, J.A., Weyers, S.L., Dell, C.J., Harmel, R.D., Kleinman, P.J., Sistani, K.R., Leytem, A.B., Huggins, D.R., Strickland, T.C., Kitchen, N.R., Meisinger, J.J., Del Grosso, S.J., Johnson, J.M., Balkcom, K.S., Finley, J.W., Fukagawa, N.K., Powell, J.M., Van Pelt, R.S. 2016. USDA Agricultural Research Service creates Nutrient Uptake and Outcome Network (NUOnet) Journal of Soil and Water Conservation. 71(6):147A-148A. https://doi.org/10.2489/jswc.71.6.147A.Use of the Nitrogen Index to assess nitrate leaching and water drainage from plastic-mulched horticultural cropping systems of Florida

- (Peer Reviewed Journal)Marchi, E., Zotarelli, L., Delgado, J.A., Rowland, D., Marchie, G. 2016. Use of the Nitrogen Index to assess nitrate leaching and water drainage from plastic-mulched horticultural cropping systems of Florida. International Soil and Water Conservation Research. 4(4):237-244. doi:10.1016/j.iswcr.2016.12.001.Nitrate leaching index

- (Peer Reviewed Journal)Van Es, H.M., Delgado, J.A. 2017. Nitrate leaching index. Encyclopedia of Soil Science. In: Lal, R. editor. Encyclopedia of Soil Science. 3rd Edition. New York, NY:Taylor & Francis. p. 1535-1537.Nitrate Leaching Management

- (Peer Reviewed Journal)Meisinger, J.J., Delgado, J.A., Alva, A.K. 2017. Nitrate Leaching Management. In R. Lal, editor. Encyclopedia of Soil Science. Encyclopedia of Soil Science. Taylor & Francis, New York, NY. p. 1538-1540.Effects of Long-Term Nitrogen Management on Nitrogen Budgets of Irrigated No-till Corn

- (Abstract Only)Delgado, J.A., Halvorson, A.D., Stewart, C.E., Del Grosso, S.J., Manter, D.K., D Adamo, R.E., Floyd, B.A. 2016. Effects of Long-Term Nitrogen Management on Nitrogen Budgets of Irrigated No-till Corn. American Society of Agronomy Abstracts. ASA Abstracts CDROM, Madison WI, USA.The Guanajuato Communication about the Potential for Implementation of Conservation Practices for Climate Change Mitigation and 
Adaptation to Achieve Food Security in Mexico During the 21st Century

- (Proceedings)Delgado, J.A., Cueto, J., Figueroa, U., Peña-Cabriales, J.J. 2016. The Guanajuato Communication about the Potential for Implementation of Conservation Practices for Climate Change Mitigation and Adaptation to Achieve Food Security in Mexico During the 21st Century. Meeting Proceedings. http://www.smcsmx.org/files/congresos/2016/Memorias_XLI_CNCS.pdf.NUOnet, a Data Network Initiative Led by the USDA Agricultural Research Service

- (Abstract Only)Eve, M.D., Delgado, J.A., Weyers, S.L., Dell, C.J., Harmel, R.D. 2016. NUOnet, a Data Network Initiative Led by the USDA Agricultural Research Service. American Society of Agronomy Abstracts. CSANews 61:26-26. doi:10.2134/csa2016-61-10-11.Nitrogen Index

- (Peer Reviewed Journal)Delgado, J.A. 2016. Nitrogen Index. Encyclopedia of Soil Science. Third Edition. CRC Press. doi:10.1081/E-ESS3-120053861.Nutrient management

- (Peer Reviewed Journal)Delgado, J.A. 2016. Nutrient management. Encyclopedia of Soil Science. Third edition. CRC Press. doi:10.1081/E-ESS3-120053859.Cover Crops

- (Peer Reviewed Journal)Delgado, J.A. 2016. Cover Crops. Encyclopedia of Soil Science. Third Edition. CRC Press. doi:10.1081/E-ESS3-120054071.Emerging and established technologies to increase nitrogen use efficiency of cereals

- (Peer Reviewed Journal)Herrera, J., Rubio, G., Levy, L., Delgado, J.A., Lucho-Constantino, C., Islas-Valdez, S., Pellet, D. 2016. Emerging and established technologies to increase nitrogen use efficiency of cereals. Agronomy. 6(2):25. doi:10.3390./agronomy6020025.The Nanchang communication about the potential for the implementation of conservation practices for climate change mitigation and adaptation to achieve food security in the 21st century

- (Peer Reviewed Journal)Delgado, J.A., Li, R. 2016. The Nanchang communication about the potential for the implementation of conservation practices for climate change mitigation and adaptation to achieve food security in the 21st century. International Soil and Water Conservation Research. 4:148-150. doi:10.1016/j.iswcr.2016.05.002.myPhyloDB: a local web server for the storage and analysis of metagenomics data

- (Peer Reviewed Journal)Manter, D.K., Korsa, M.S., Tebbe, C.R., Delgado, J.A. 2016. myPhyloDB: a local web server for the storage and analysis of metagenomics data. Database: The Journal of Biological Databases and Curation. doi:10.1093/database/baw37.A nitrogen index for improving nutrient management within commercial Mexican dairy operations

- (Peer Reviewed Journal)Figueroa-Viramontes, U., Delgado, J.A., Sanchez-Duarte, J., Ochoa-Martinez, E., Nunez-Hernandez, G. 2016. A nitrogen index for improving nutrient management within commercial Mexican dairy operations. International Soil and Water Conservation Research. 4(1):1-5. doi:10.1016/j.iswcr.2016.02.005.The 4Rs for cover crops and other advances in cover crop management for environmental quality

- (Peer Reviewed Journal)Delgado, J.A., Gantzer, C.J. 2015. The 4Rs for cover crops and other advances in cover crop management for environmental quality. Journal of Soil and Water Conservation. 70(6):142A-145A. doi:10.2489/jswc.70.6.142A.Conservation strategies to adapt to projected climate change impacts in Malawi

- (Peer Reviewed Journal)Kambauwa, G., Mlamba, J., Delgado, J.A., Kabambe, V. 2015. Conservation strategies to adapt to projected climate change impacts in Malawi. Journal of Soil and Water Conservation. 70:109A-114A. doi:10.2489/jswc.70.5.109A.ARS NP212 Climate change, soils and emissions program update

- (Abstract Only)Silva, P.J., Sistani, K.R., Delgado, J.A., Walthall, C.L., Del Grosso, S.J. 2015. ARS NP212 Climate change, soils and emissions program update. Meeting Abstract. Abstract.Use of the new Nitrogen Index tier zero to assess the effects of nitrogen fertilizer on N2O emissions from cropping systems in Mexico

- (Peer Reviewed Journal)Saynes, V., Delgado, J.A., Tebbe, C., Etchevers, J.D., Lapidus, D., Otero-Arnaiz, A. 2014. Use of the new Nitrogen Index tier zero to assess the effects of nitrogen fertilizer on N2O emissions from cropping systems in Mexico. Ecological Engineering. 73:778-785.4 Rs are not enough: We need 7 Rs for nutrient management and conservation to increase nutrient use efficiency and reduce off-site transport of nutrients

- (Peer Reviewed Journal)Delgado, J.A. 2016. 4 Rs are not enough: We need 7 Rs for nutrient management and conservation to increase nutrient use efficiency and reduce off-site transport of nutrients. In: Lal, R., Stewart, B.A., editors. Soil Specific Farming: Precision Agriculture. Advances in Soil Science series. Boca Raton, FL: CRC Press. p. 89-126.A new index to assess nitrogen dynamics in potato (Solanum tuberosum L.) production systems of Bolivia

- (Peer Reviewed Journal)Saavedra, A., Delgado, J.A., Botello, R., Mamani, P., Alwang, J. 2014. A new index to assess nitrogen dynamics in potato (Solanum tuberosum L.) production systems of Bolivia. Agrociencia. Agrociencia 48: 667-678.A new nitrogen index for assessment of nitrogen management practices of Andean Mountain cropping systems of Ecuador

- (Peer Reviewed Journal)Escudero, L., Delgado, J.A., Monar, C., Valverde, F., Barrera, V., Alwang, J. 2014. A new nitrogen index for assessment of nitrogen management practices of Andean Mountain cropping systems of Ecuador. Soil Science. 179:130-140.Conservation practices for climate change mitigation and adaptation will be needed for food security in the 21st century

- (Popular Publication)Delgado, J.A. 2014. Conservation practices for climate change mitigation and adaptation will be needed for food security in the 21st century. European Soil Conservation Society. Vol 20.Annual precipitation and effects of runoff-nutrient from agricultural watersheds on water quality

- (Peer Reviewed Journal)Elrashidi, M., Seybold, C., Delgado, J.A. 2014. Annual precipitation and effects of runoff-nutrient from agricultural watersheds on water quality. Soil Science. 178:679-688.Climate change, agricultural adaptation and mitigation, and using 
the nitrogen index to increase nitrogen use efficiency

- (Proceedings)Development and testing of a new phosphorus index for Kentucky

- (Peer Reviewed Journal)Bolster, C.H., Horvath, T., Lee, B., Mehlhope, S., Higgins, S.F., Delgado, J.A. 2014. Development and testing of a new phosphorus index for Kentucky. Journal of Soil and Water Conservation. 69(3):183-196.The nitrogen index as a tool to reduce nitrogen loss to the environment

- (Proceedings)Cover crops alter the soil microbial community and increase potato tuber yield and quality

- (Abstract Only)Manter, D.K., Delgado, J.A., Dillon, M., Essah, S. 2013. Cover crops alter the soil microbial community and increase potato tuber yield and quality. American Society of Agronomy Abstracts. 1.Revising the phosphorus index for Kentucky

- (Abstract Only)Bolster, C.H., Horvath, T., Lee, B., Mehlhope, S., Higgins, S.F., Delgado, J.A. 2013. Revising the phosphorus index for Kentucky. ASA-CSSA-SSSA Annual Meeting Abstracts. Abstract.Conservation practices for climate change

- (Peer Reviewed Journal)Delgado, J.A., Nearing, M.A., Rice, C. 2013. Conservation practices for climate change. Advances in Agronomy. 121:47-115.Modeling landscape-scale nitrogen management for conservation

- (Book / Chapter)Ascough II, J.C., Delgado, J.A.  2015.  Modeling landscape-scale nitrogen management for conservation. In: GIS Applications in Agriculture, Volume Four, Conservation Planning, T. Mueller and G.F. Sassenrath (Eds.). CRC Press, Boca Raton, FL.  pp. 101–118. doi:10.1201/b18173-8.The implementation of the new Kentucky nitrogen and phosphorus index to reduce agricultural nonpoint source pollution

- (Abstract Only)Horvath, T., Bolster, C.H., Delgado, J.A. 2013. The implementation of the new Kentucky nitrogen and phosphorus index to reduce agricultural nonpoint source pollution. Kentucky Water Resources Research Institute Symposium. Presentation.Development and testing of a new phosphorus index for Kentucky

- (Proceedings)Bolster, C.H., Mehlhope, S., Horvath, T., Delgado, J.A., Higgins, S.F., Coffey, R.D., Coleman, S., Goodman, P., Lee, B., Renfro, C., Ritchey, E.L. 2013. Development and testing of a new phosphorus index for Kentucky. Kentucky Water Resources Research Institute Symposium. Abstract.Positive impacts in soil and water conservation in an Andean region of South America: Case scenarios from a USAID multidisciplinary cooperative project

- (Peer Reviewed Journal)Monar, C., Saavedra, A., Escudero, L., Delgado, J.A., Alwang, J., Barrera, V., Botello, R. 2013. Positive impacts in soil and water conservation in an Andean region of South America: Case scenarios from a USAID multidisciplinary cooperative project. Journal of Soil and Water Conservation. 68:25A-30A.The first nitrogen index app for mobile devices: using portable technology for smart agricultural management

- (Peer Reviewed Journal)Delgado, J.A., Kowalski, K.D., Tebbe, C.R. 2013. The first nitrogen index app for mobile devices: using portable technology for smart agricultural management. Computers and Electronics in Agriculture. 91:121-123.Cost effectiveness of on- and off-field conservation practices designed to reduce nitrogen in downstream water

- (Peer Reviewed Journal)Hansen, L., Delgado, J.A., Ribaudo, M., Crumpton, W. 2012. Cost effectiveness of on- and off-field conservation practices designed to reduce nitrogen in downstream water. Journal of Environmental Economics and Management. 67:162A-166A.Adapting agriculture to drought and extreme events

- (Peer Reviewed Journal)Lal, R., Delgado, J.A., Nielsen, D.C., Rice, C., Van Pelt, R.S. 2012. Adapting agriculture to drought and extreme events. Journal of Soil and Water Conservation. 67:162A-166A.Climate Change and Agriculture: Effects and Adaptation

- (Government Publication)Walthall, C.L., Hatfield, J.L., Marshall, E., Lengnick, L., Backlund, P., Adkins, S.T., Ainsworth, E.A., Booker, F.L., Blumenthal, D.M., Bunce, J.A., Burkey, K.O., Dabney, S.M., Goodrich, D.C., Lewers, K.S., Nearing, M.A., Ort, D.R., Pettigrew, W.T., Polley, H.W., Rosskopf, E.N., Srygley, R.B., Ziska, L.H., Delgado, J.A., Funk, A.J., Glenn, D.M., Morgan, J.A., White, J.W., Timlin, D.J., Mcclung, A.M. 2013. Climate Change and Agriculture: Effects and Adaption. Washington, DC: USDA Technical Bulletin 1935. 186 p.Effects of cover crops on the microbial community and its ability to suppress disease and acquire nutrients

- (Abstract Only)Barnett, B.A., Delgado, J.A., Manter, D.K. 2012. Effects of cover crops on the microbial community and its ability to suppress disease and acquire nutrients. Potato Association of America Proceedings. p. 10.Nitrogen trading tool

- (Peer Reviewed Journal)Delgado, J.A. 2012. Nitrogen trading tool. In: Sven Erik Jorgensen Editor.Encyclopedia of Environmental Management. New York, NY: CRC Press Taylor & Francis Group. P. 1772-1784.Cover crops can improve potato tuber yield and quality

- (Peer Reviewed Journal)Essah, S., Delgado, J.A., Dillon, M., Sparks, R. 2012. Cover crops can improve potato tuber yield and quality. HortTechnology. 22:185-190.Best Nitrogen Management Practices Can Reduce the Potential Flux of Nitrogen Out of the Arkansas Delta

- (Peer Reviewed Journal)Shumway, C., Delgado, J.A., Bunch, T., Hansen, L., Rubaudo, M. 2012. Best Nitrogen Management Practices Can Reduce the Potential Flux of Nitrogen Out of the Arkansas Delta. Soil Science. 177:198-209.Recent advances in precision (Target) conservation

- (Peer Reviewed Journal)Delgado, J.A., Khosla, R., Mueller, T. 2011. Recent advances in precision (Target) conservation. Journal of Soil and Water Conservation Society. 66:167A-170A.The AgES-NLEAP tool for precision nitrogen conservation management

- (Abstract Only)Ascough II, J.C., Delgado, J.A. 2011. The AgES-NLEAP tool for precision nitrogen conservation management. Soil and Water Conservation Annual Meeting, July 17-20, 2011, Washington, D.C. p.13.A new nitrogen index to elvaluate nitrogen losses in intensive forage systems in Mexico

- (Peer Reviewed Journal)Figueroa-Viramontes1, U., Delgado, J.A., Cueto-Wong, J., Núñez-Hernández, G., Reta-Sanchez1, D., Barbarick, K. 2011. A new nitrogen index to elvaluate nitrogen losses in intensive forage systems in Mexico. Agriculture, Ecosystems and Environment. 142:352-364.Soil management to mitigate climate change

- (Peer Reviewed Journal)Lal, R., Delgado, J.A., Salon, P.R., Dell, C.J., Groffman, P., Miller, N., Rotz, C.A. 2011. Soil management to mitigate climate change. Journal of Soil and Water Conservation. 66(1):276-285.Nitrogen Leaching Index

- (Peer Reviewed Journal)Delgado, J.A. 2012. Nitrogen Leaching Index. In: Sven Erik Jorgensen, Editor.  Encyclopedia of Environmental Management. New York, NY: CRC Press Taylor & Francis Group. P. 1761-1767.Preliminary assessment of the potential for nitrous oxide offsets in a cap and trade program

- (Peer Reviewed Journal)Ribaudo, M., Delgado, J.A., Livingston, M. 2011. Preliminary assessment of the potential for nitrous oxide offsets in a cap and trade program. Journal of Agricultural and Resource Economics. 40:1 - 6.A GIS Assessment to Identify and Reduce Nitrate Loads that Contribute to Hypoxia in the Gulf of Mexico

- (Abstract Only)Conservation practices to mitigate and adapt to the effects of climate change

- (Peer Reviewed Journal)Delgado, J.A., Secchi, S., Groffman, P., Nearing, M.A., Goddard, T., Reicocky, D., Lal, R., Salon, P., Kitchen, N.R., Rice, C., Towery, D. 2011. Conservation practices to mitigate and adapt to the effects of climate change. Journal of Soil and Water Conservation Society. 66(a):118A-129A.Conservation Practices to Mitigate and Adapt to Climate Change. Poster Demonstration

- (Abstract Only)Delgado, J.A., Groffman, P., Nearing, M.A., Goddard, T., Reicosky, D., Lal, R., Kitchen, N.R., Rice, C., Towery, D. 2011. Conservation Practices to Mitigate and Adapt to Climate Change. Poster Demonstration. Soil Science Society of America Annual Meeting. p. 1.Accumulation of late-applied nitrogen and root dynamics during grain filling in irrigated spring wheat

- (Peer Reviewed Journal)Herrera, J.M., Delgado, J.A., Dillon, M., Barbarick, K., Mcmaster, G.S. 2011. Accumulation of late-applied nitrogen and root dynamics during grain filling in irrigated spring wheat. Communications in Soil Science and Plant Analysis. 42:2235-2249.Conservation Practices to Mitigate and Adapt to Climate Change. Poster Demonstration

- (Abstract Only)Delgado, J.A., Groffman, P., Nearing, M.A., Goddard, T., Reicosky, D., Lal, R., Kitchen, N.R., Rice, C., Towery, D. 2011. Conservation Practices to Mitigate and Adapt to Climate Change. Poster Demonstration. Soil and Water Conservation Society. p. 1.Nitrogen in agricultural systems: Implications for conservation policy

- (Research Technical Update)Ribaudo, M., Delgado, J.A., Hansen, L., Livingston, M., Mosheim, R., Williamson, J. 2011. Nitrogen in agricultural systems: Implications for conservation policy. United States Department of Agriculture Economic Research Service Proceedings. 1.Advances in Nitrogen Management for Water Quality

- (Abstract Only)Delgado, J.A., Follett, R.F. 2011. Advances in Nitrogen Management for Water Quality. Journal of Soil and Water Conservation. 66(1):25A-26A.Drainage water management for water quality protection

- (Literature Review)Strock, J., Kleinman, P.J., King, K.W., Delgado, J.A. 2010. Drainage water management for water quality protection. Journal of Soil and Water Conservation. 65(6):131A-136A.Crop residue is key for sustaining maximum food production and for conservation of our biosphere

- (Peer Reviewed Journal)Delgado, J.A. 2010. Crop residue is key for sustaining maximum food production and for conservation of our biosphere. Journal of Soil and Water Conservation. 65:111A-116A.Chapter 14. New tools to assess nitrogen management for conservation of our biosphere

- (Book / Chapter)Delgado, J.A., Gagliardi, P.M., Shaffer, M.J., Cover, H., Hesketh, E. 2010. Chapter 14. New tools to assess nitrogen management for conservation of our biosphere. p. 373-409. In Delgado, J.A. and R.F. Follett (eds). Advances in Nitrogen Management for Water Quality. SWCS, Ankeny, IA.Chapter 15. A tiered approach to nitrogen management: A USDA perspective

- (Book / Chapter)Gross, C., Delgado, J.A., Shaffer, M., Gasseling, D., Bunch, T., Fry, R. 2010. Chapter 15. A tiered approach to nitrogen management: A USDA perspective. p. 410-424. In Delgado, J.A. and R.F. Follett (eds) Advances in Nitrogen Management for Water Quality. SWCS, Ankeny, IA.Using cover crops and cropping systems for nitrogen management

- (Book / Chapter)Dabney, S.M., Meisinger, J.J., Schomberg, H.H., Liebig, M.A., Kaspar, T.C., Delgado, J.A., Mitchell, J., Reeves, D.W. 2010. Using cover crops and cropping systems for nitrogen management. p. 230-281. In Delgado, J.A. and R.F. Follett (eds) Advances in Nitrogen Management for Water Quality, Ankeny, IA.Advances in nitrogen management for water quality

- (Book / Chapter)Delgado, J.A., Follett, R.F. (eds) 2010. Advances in nitrogen management for water quality. Soil and Water Conservation Society. pp. 1-424.Pyrosequencing reveals a highly diverse and cultivar-specific bacterial endophyte community in plant roots

- (Peer Reviewed Journal)Manter, D.K., Delgado, J.A., Holm, D., Stong, R.A. 2010. Pyrosequencing reveals a highly diverse and cultivar-specific bacterial endophyte community in plant roots. Microbial Ecology. 60:157-166.A NEW GIS NITROGEN TRADING TOOL CONCEPT FOR CONSERVATION AND  REDUCTION OF REACTIVE NITROGEN LOSSES TO THE ENVIRONMENT

- (Peer Reviewed Journal)Delgado, J.A., Gross, C., Lal, H., Cover, H., Gagliardi, P., Mckinney, S., Hesketh, E., Shaffer, M. 2010. A NEW GIS NITROGEN TRADING TOOL CONCEPT FOR CONSERVATION AND REDUCTION OF REACTIVE NITROGEN LOSSES TO THE ENVIRONMENT. Advances in Agronomy. 105:117-171.Chlorophyll Meter SPAD-502 Calibration to Evaluate Nitrogen Requirements in Forage Corn

- (Peer Reviewed Journal)Torres, A., Viramontes, U., Delgado, J.A., Hernandez, G., Cueto-Wong, J., Gil, A., Rangel, P. 2009. Chlorophyll Meter SPAD-502 Calibration to Evaluate Nitrogen Requirements in Forage Corn. Terra Latinoamerica. 27:303-309.Calculation of Manure Production and Excretion of Nitrogen, Phosphorous and Potassium by Dairy Cattle in the Comarca Lagunera

- (Peer Reviewed Journal)Viramontes, U., Hernandez, G., Delgado, J.A., Cueto-Wong, J. 2009. Calculation of Manure Production and Excretion of Nitrogen, Phosphorous and Potassium by Dairy Cattle in the Comarca Lagunera. Terra Latinoamerica. p. 128-151.15N Isotopic Crop Exchange Residue Studies Suggest that IPCC N Input Methodologies to Assess N2O-N Emissions Should be Reevaluated

- (Peer Reviewed Journal)Delgado, J.A., Del Grosso, S.J., Ogle, S. 2009. 15N Isotopic Crop Exchange Residue Studies Suggest that IPCC N Input Methodologies to Assess N2O-N Emissions Should be Reevaluated. Nutrient Cycling in Agroecosystems. (doi:10.1007/s10705-009-9300-9).Nutrient Credit Trading--a Market-based Approach for Improving Water Quality

- (Peer Reviewed Journal)Lal, H., Delgado, J.A., Gross, C., Mckinney, S., Cover, H., Shaffer, M.J., Hesketh, E. 2009. Nutrient Credit Trading--a Market-based Approach for Improving Water Quality. Environmenetal Science and Policy. (doi:10.1016/j.envsci.2009.05.003).A NEW NITROGEN INDEX: An Adaptive Management Tool for Reducing Nitrogen Losses to the Environment from Mexican Forage Production Systems

- (Abstract Only)Figueroa, V.U., Delgado, J.A., Cueto-Wong, J., Nunez, H.G., Reta, D.G., Fry, R., Barbarick, K., Gagliardi, P., Gross, C. 2009. A NEW NITROGEN INDEX: An Adaptive Management Tool for Reducing Nitrogen Losses to the Environment from Mexican Forage Production Systems. Soil and Water Conservation Society.Adaptive Management Tools for Nitrogen: Nitrogen Index, Nitrogen Trading Tool and Nitrogen Losses Environmental Assessment Package (NLEAP-GIS)

- (Abstract Only)Delgado, J.A., Gross, C., Lal, H., Cover, H., Fry, P., Gagliardi, P., Mckinney, S., Shaffer, M. 2009. Adaptive Management Tools for Nitrogen: Nitrogen Index, Nitrogen Trading Tool and Nitrogen Losses Environmental Assessment Package (NLEAP-GIS). Soil and Water Conservation Society.Adaptive management and the USDA-NRCS Nutrient Management (590) conservation practice standard

- (Abstract Only)Gross, C., Delgado, J.A., Morris, T., Kuenstler, W., Lemunyon, J., Widman, N. 2009. Adaptive management and the USDA-NRCS Nutrient Management (590) conservation practice standard. Soil and Water Conservation Society.Bias in IPCC Methodologies for Assessment of N2O emissions from Crop  Residue

- (Abstract Only)Delgado, J.A., Del Grosso, S.J., Ogle, S. 2009. Bias in IPCC Methodologies for Assessment of N2O emissions from Crop Residue. Soil Science Society of America Annual Meeting.Use of 15N labeled Urea to Study Nitrogen Use Efficiencies in a Forage Corn-Oat Rotation Grown on Clay and Sandy Clay Loam Soils of Mexico

- (Abstract Only)Cueto-Wong, J., Delgado, J.A., Figueroa, U.V., Quiroga-Garza, H.M., Trucios-Casiano, R. 2009. Use of 15N labeled Urea to Study Nitrogen Use Efficiencies in a Forage Corn-Oat Rotation Grown on Clay and Sandy Clay Loam Soils of Mexico. Soil and Water Conservation Society.NLEAP-GIS Modeling in a Mediterranean Region of Spain

- (Proceedings)De Paz, J.M., Albert, C., Delgado, J.A. 2009. NLEAP-GIS Modeling in a Mediterranean Region of Spain. Nitrogen Workshop. "Connecting Different Scales of Nitrogen Use in Agriculture". Grignani C., Acutis M, Zavattaro L., Bechini L., Bertota C., Gallina P., Sacco D (edds). Turin, Italy, June 28-July 1, 2009.15N Uptake from Manure and Fertilizer Sousrces by Three Consecutive Crops Under Controlled Conditions.

- (Peer Reviewed Journal)Quiroga-Garza, H.M., Cueto-Wong, J.A., Lindemann, W.C., Delgado, J.A. 2009. 15N Uptake from Manure and Fertilizer Sousrces by Three Consecutive Crops Under Controlled Conditions. Brazilian Journal of Soil Science. 33:1249-1258.California Nitrogen Index

- (Government Publication)Delgado, J.A., Gagliardi, P., Rau, E.J., Fry, R., Figueroa, U., Gross, C., Cueto-Wong, J., Shaffer, M.J. 2009. California Nitrogen Index. Government Publication/Report. (USDA-ARS-SPNR and NRCS User Manual).Ecologically sustainable development in dairy farms II: Nutrient cycling

- (Proceedings)Viramontes, U., Hernandez, G., Delgado, J.A., Wong, J., Avalos, J. 2008. Ecologically sustainable development in dairy farms II: Nutrient cycling. Paper presented in the FIL-IDF World Dairy Summit and Exhibition, Nov. 11-14-2008, Mexico City, MX.   http://www/wds2008mexico.com/wds-conf/Use of a new GIS nitrogen index assessment tool for evaluation of nitrate leaching across a Mediterranean Region

- (Peer Reviewed Journal)De Paz, J., Delgado, J.A., Ramos, C., Shaffer, M., Barbarick, K. 2009. Use of a new GIS Nitrogen Index Assessment Tool for Evaluation of Nitrate Leaching Across a Mediterranean Region. Agriculture Ecosystems and the Environment. 365:183-194.A New GIS-Nitrogen Trading Tool Concept to Minimize Reactive Nitrogen losses to the Environment

- (Abstract Only)Communicating Conservation Effects Assessment Project Results

- (Peer Reviewed Journal)Delgado, J.A., Anderson-Wik, M. 2008. Communicating Conservation Effects Assessment Project Results. Journal of Soil and Water Conservation. 63:176A-177.A Response to Sustainable Crop Production in a Region Facing a Decline in Groundwater Aquifer Levels

- (Abstract Only)New Advances and Practices for Precision Conservation

- (Proceedings)Delgado, J.A., Berry, J., Khosla, R. 2008. New Advances and Practices for Precision Conservation. 9th International Symposium on Precision Agriculture. ASA Madison, WI. (CD-ROM).Integrated nitrogen management.

- (Book / Chapter)Herrera, J., Delgado, J.A. 2010. Integrated nitrogen management. Soil and Water Conservation Society. p. 94-127. In Delgado, J.A. and R.F. Follett (eds). Advances in Nitrogen Management for Water Quality. SWCS, Ankeny, IA.Assessment of nitrogen losses to the environment with a Nitrogen Trading Tool (NTT)

- (Peer Reviewed Journal)Delgado, J.A., Shaffer, M.J., Lal, H., Mckinney, S., Cross, C., Cover, H. 2008. Assessment of nitrogen losses to the environment with a Nitrogen Trading Tool (NTT). Computers and Electronics in Agriculture. 63:193-206.Sustainable Cover Crop Rotations with Potential to Improve Yields, Crop Quality, and Nutrient and Water Use Efficiencies-

- (Abstract Only)Delgado, J.A., Essah, S., Dillon, M., Ingham, R., Manter, D.K., Stuebe, A., Sparks, R. 2008. Sustainable Cover Crop Rotations with Potential to Improve Yields, Crop Quality, and Nutrient and Water Use Efficiencies-. Soil and Water Conservation Society Proceedings.Precision Farming and Conservation Advances Agricultural Sustainability

- (Other)Berry, J., Delgado, J.A., Khosla, R. 2008. Precision Farming and Conservation Advances Agricultural Sustainability. World Wide Web. http://vector1media.com/article/feature/precision-farming-advances-agriculltural-sustainability/New Advances and Practices for Precision Conservation.

- (Abstract Only)Delgado, J.A., Khosla, R., Berry, J. 2008. New Advances and Practices for Precision Conservation. Proc. of the Conference on Precision Agriculture in Denver, CO in 2008.Nitrogen Trading Tool (NTT)

- (Peer Reviewed Journal)Cross, C., Mckinney, S., Lal, H., Cover, H., Delgado, J.A., Shaffer, M. 2008. Nitrogen Trading Tool (NTT). Journal of Soil and Water Conservation 63: 44A-45A.ADVANCES IN PRECISION CONSERVATION

- (Peer Reviewed Journal)Delgado, J.A., Berry, J. 2008. Advances in precision conservation. Advances in Agronomy 98: 1-44.Evaluation of best nitrogen management practices across regions of Argentina and Spain

- (Book / Chapter)Lavado, R., De Paz, J., Delgado, J.A., Rimski-Korsakov, H. 2010. Evaluation of best nitrogen management practices across regions of Argentina and Spain. p. 313-342. Delgado, J.A. and R.F. Follett (eds). Advances in Nitrogen Management for Water Quality. SWCS, Ankeny, IA.Simulation processes for the nitrogen loss and environmental assessment package (NLEAP).

- (Book / Chapter)Shaffer, M.J., Delgado, J.A., Cross, C., Follett, R.F. 2010. Simulation Processes for the processes for the nitrogen loss and environmental assessment package (NLEAP). Soil and Water Conservation Society. p. 361-372. In Delgado, J.A. and R.F. Follett (eds) Advances in Nitrogen Management for Water Quality, SWCS, Ankeny, IA.An index approach to assess nitrogen losses to the environment

- (Peer Reviewed Journal)Delgado, J.A., Shaffer, M.J., Hu, C., Lavado, R., Wong, J.C., Joosse, P., Li, X., Rimski-Korasako, H., Follett, R.F., Del Grosso, S.J., Colon, W., Sotomayor, D. 2008. An index approach to assess nitrogen losses to the environment. Journal of Ecological Engineering 32: 108-120.A New Weighing Method to Measure Shoot Water Interception

- (Peer Reviewed Journal)Mauch, K.J., Delgado, J.A., Bausch, W.C., Barbarick, K., Mcmaster, G.S. 2008. A new weighing method to measure shoot water interception. Journal of Irrigation and Drainage Engineering 134: 349-355.Nitrogen Management Modeling Techniques: Assessing Cropping Systems/Landscape Combinations.

- (Book / Chapter)Delgado, J.A., Shaffer, M.J. Nitrogen Management Modeling Techniques: Assessing Cropping Systems/Landscape Combinations. Book Chapter In R.F. Follett and J.L. Hatfield (eds) Nitrogen in the Environment: Sousrces, Problems and Management. pp. 539-570. Elsevier Science, New York, USA.A Decade of Advances in Cover Crops: Cover Crops with Limited Irrigation can Increased Yields, Crop Quality, Nutrient and Water Use Efficiencies While Protecting the Environment

- (Peer Reviewed Journal)Delgado, J.A., Dillon, M., Sparks, R., Essah, S. 2007. A decade of advances in cover crops: cover crops with limited irrigation can increased yields, crop quality, nutrient and water use efficiencies while protecting the environment. Journal of Soil and Water Conservation. 62:110A-117A.Assessment of Delta Nitrogen Losses (Delta NL) at the Field Level

- (Abstract Only)Delgado, J.A., Shaffer, M.J., Lal, H., Mckinney, S. 2007. Assessment of Delta Nitrogen Losses (Delta NL) at the Field Level. ASA, CSSA, SSSA Annual Meeting, New Orleans, LA Nov. 4-8-20076. CD-ROM.  . ASA-CSSA-SSSA Annual Meeting Abstracts.Managing Cover Crops in Conservation Tillage Systems

- (Book / Chapter)Balkcom, K.S., Schomberg, H.H., Reeves, D.W., Clark, A., Baumhardt, R.L., Collins, H.P., Delgado, J.A., Kaspar, T.C., Mitchell, J., Duiker, S. 2007. Managing Cover Crops in Conservation Tillage Systems. In: Clark, A. Managing Cover Crops Profitability. 3rd edition. Handbook Series Book 9. Sustainable Agriculture Network. p. 44-61.Testing of a Nitrogen Index to Assess N Management Practices With GIS  To Identify High-Risk Cropping System/Landscape Combinations

- (Abstract Only)Delgado, J.A., Shaffer, M.J. 2007. Testing of a Nitrogen Index to Assess N Management Practices With GIS. Abstract. p. 111. Soil and Water Conservation Society Annual Meeting, Tampa, FL 07-21-25-2007. To Identify High-Risk Cropping System/Landscape Combinations. Soil and Water Conservation Society Proceedings.Nitrogen Management for Maximizing Potato Yield, Tuber Quality, and Environmental Conservation

- (Proceedings)Essah, S., Delgado, J.A. 2009. Nitrogen Management for Maximizing Potato Yield, Tuber Quality, and Environmental Conservation. p. 317-325.  E.K. Yanful (ed) Appropriate Technologies for Environmental Protection in the Developing World.  Springer, The Netherlands.Assessment of mineral nitrogen dynamic and its concentration in the soil profile with the updated NLEAP V.2 model: A case study in South Central Bulgaria

- (Abstract Only)Anguelov, G., Delgado, J.A., Shaffer, M.J. 2007. Assessment of mineral nitrogen dynamic and its concentration in the soil profile with the updated NLEAP V.2 model: A case study in South Central Bulgaria. Soil and Water Conservation Society Proceedings. Abstract. Soil and Water Conservation Society Annual Meeting, Tampa, FL, July 21-25-2007. p. 64.Nitrogen leaching on Fluvisols under vegetable cropping system: An assessment with the NLEAP model in Southern Bulgaria

- (Abstract Only)Anguelov, G., Kercheva, M., Koleva, V., Stoicheva, D., Delgado, J.A. 2007. Nitrogen leaching on Fluvisols under vegetable cropping system: An assessment with the NLEAP model in Southern Bulgaria. Soil and Water Conservation Society Proceedings. Annual Meeting Abstract. Tampa, FL July 21-25-2007. p. 71.Testing of a Nitrogen Index to Assess N Management Practices With GIS  To Identify High-Risk Cropping System/Landscape Combinations

- (Abstract Only)Delgado, J.A., Shaffer, M.J. 2007. Testing of a Nitrogen Index to Assess N Management Practices With GIS. Proc. of the Soil and Water Conservation. To Identify High-Risk Cropping System/Landscape Combinations  . Soil and Water Conservation Society Proceedings.Effect of Cover Crops on Soil Fungal Diversity and Biomass

- (Proceedings)Manter, D.K., Delgado, J.A., Merlin, D., Samuel, E. 2007. Effect of Cover Crops on Soil Fungal Diversity and Biomass. Meeting Proceedings. pp. 21-22.Using Green Manure to Enhance POtato Production: II, Other Bnenefits -Effects on Nutrient Cycling, Tuber Yield and Quality

- (Proceedings)Delgado, J.A., Essah, S., Dillon, M., Ingahn, R., Manter, D.K., Stuebe, A., Sparks, R. 2007. Using Green Manure to Enhance POtato Production: II, Other Bnenefits -Effects on Nutrient Cycling, Tuber Yield and Quality. 24th Annual Potato/Grain Conference, Jan. 30 -  Feb. 2, 2007, Colorado State University, Monte Vista, CO.INCREASED NITROGEN USE EFFICIENCIES AS A KEY MITIGATION ALTERNATIVE TO REDUCE NITRATE LEACHING IN THE NORTHERN CHINA PLAIN

- (Peer Reviewed Journal)Li, X., Hu, C., Zhang, Y., Delgado, J.A., Ouyand, Z. 2007. Increased nitrogen use efficiencies as a key mitigation alternative to reduce nitrate leaching in the northern china plain. Agricultural Water Management. 89:137-147.NITROGEN FERTILIZER MANAGEMENT BASED ON SITE-SPECIFIC MANAGEMENT ZONES REDUCE POTENTIAL FOR NO3-N LEACHING

- (Peer Reviewed Journal)Delgado, J.A., Khosla, R., Bausch, W.C., Westfll, D., Inman, D. 2006. Nitrogen fertilizer management based on site-specific management zones reduce potential for NO3-n leaching. Journal of Soil and Water Conservation Society. 60:402-410USE OF 15N ISOTOPIC TECHNIQUES TO ASSESS THE POTENTIAL OF A MUSTARD COVER CROP TO CYCLE N TO POTATOES

- (Peer Reviewed Journal)Collins, H.P., Delgado, J.A., Alva, A.K., Follett, R.F. 2007. Use of 15n isotopic techniques to estimate nitrogen cycling from a mustard cover crop to potatoes. Agronomy Journal. 99: 27-35, 2007.PRECISION CONSERVATION

- (Peer Reviewed Journal)Berry, J., Delgado, J.A. 2007. Precision conservation. In: Stand trimble (ed). Encyclopedia of Water Science. Marcel Decker, New York. DOI:.1081/E-EWS-12004829 -  electronic version.A Decade if Cgange in Nutrient Management: A New Nitrogen Index

- (Peer Reviewed Journal)Delgado, J.A., Shaffer, M.J., Hu, C., Lavado, R., Wong, J.C., Joosse, P., Li, X., Rimski-Korsakov, H., Follett, R.F., Colon, W., Sotomayor, D. 2006. A decade if cgange in nutrient management: a new nitrogen index. Journal of Soil and Water Conservation. J. Soil and Water Conservation. 61:62!-71A.CHEMICAL PROCESSES IN SOILS

- (Book / Chapter)Delgado, J.A. 2006. Chemical processes in soils. Soil Science Society of America Special Publication  Book Chapter. 70:709-710.PRECISION CONSERVATION IN NORTH AMERICA.

- (Peer Reviewed Journal)Delgado, J.A., Cox, C., Pierce, F.J., Dosskey, M. 2005. Precision conservation in North America. Journal of Soil and Water Conservation Society. 60:340-341.IMPACT OF RESIDUAL SOIL NITRATE ON REMOTE SENSED PLANT N STATUS OF IRRIGATED CORN FOR MANAGING IN-SEASON NITROGEN APPLICATIONS

- (Peer Reviewed Journal)Bausch, W.C., Delgado, J.A. 2005. Impact of residual soil nitrate on remote sensed plant n status of irrigated corn for managing in-season nitrogen applications. Precision Agriculture. Manuscript number PRAG276-04NITROGEN MANAGEMENT TO PROTECT WATER RESOURCES

- (Book / Chapter)Randall, G., Delgado, J.A., Schepers, J.S. 2008. Nitrogen management to protect water resources. p. 911-945. In Schepers and Raun (eds) Nitrogen in Agricultural Systems. SSSA Monograph. 49. Madison, WI.Potential Use of Precision Conservation Techniques to Reduce Nitrate Leaching in Irrigated Crops.

- (Peer Reviewed Journal)Delgado, J.A., Bausch, W.C. 2006. Potential Use of Precision Conservation Techniques to Reduce Nitrate Leaching in Irrigated Crops. Journal of Soil and Water Conservation. 6-:379-387.Dry biomass and nitrogen content of cover crops grown in a high altitude arid system

- (Abstract Only)Delgado, J.A., Dillon, M., Ingham, R., Sparks, R., Manter, D.K. 2005. Dry biomass and nitrogen content of cover crops grown in a high altitude arid system. American Society of Agronomy Abstracts on CD ROM.Assessment of Soil Microbial Communities Using a Combined Quantitative PCR and Length Heterogeneity Analysis Approach

- (Abstract Only)Manter, D.K., Broz, A.K., Delgado, J.A., Vivanco, J.M. 2006. Assessment of Soil Microbial Communities Using a Combined Quantitative PCR and Length Heterogeneity Analysis Approach. American Society of Agronomy Abstracts on CD ROM.APPLYING SPATIAL ANALYSIS FOR PRECISION CONSERVATION ACROSS THE LANDSCAPE

- (Peer Reviewed Journal)Berry, J., Delgado, J.A., Pierce, F., Khosla, R. 2006. Applying spatial analysis for precision conservation across the landscape. Journal of Soil and Water Conservation Society. 60:363-370.Effects of Potato-Grain Rotations on Soil Erosion, Carbon Dynamics and Properties of Rangeland Sandy Soils.

- (Peer Reviewed Journal)Alsheikh, A., Delgado, J.A., Barbarick, K., Sparks, R., Dillon, M., Qian, Y., Cardon, G. 2005. Effects of Potato-Grain Rotations on Soil Erosion, Carbon Dynamics and Properties of Rangeland Sandy Soils. J. Soil Tillage Research. 81:227-238.TECHNOLOGIES AND CROP ROTATIONS TO MANAGE VARIABILITY AND CONSERVE SOIL AND WATER QUALITY

- (Proceedings)Delgado, J.A., Stuebbe, A., Dillon, M., Sparks, R., Essah, S. 2005. Technologies and crop rotations to manage variability and conserve soil and water quality. Proc. San Luis Valley Potato Grain Conf. p. 55-65.ASSESSMENT OF GROUNDWATER USE BY WHEAT (TRITICUM ACESTIVUM L.) IN THE LUANCHENG XIAN REGION AND POTENTIAL IMPLICATIONS FOR WATER CONSERVATION IN THE NORTHWESTERN NORTH CHINA PLAIN

- (Peer Reviewed Journal)Chunsheng, H., Delgado, J.A., Xiying, Z., Ma, L. 2005. Assessment of groundwater use by wheat (triticum acestivum l.) in the luancheng xian region and potential implications for water conservation in the northwestern north china plain. Journal of Soil and Water Conservation. 60:80-88.GIS, MODELING, AND OTHER INNOVATIVE NUTRIENT MANAGEMENT TOOLS THAT CAN BE USED TO ASSESS NITRORGEN FERTILIZER USE EFFICIENCY FROM AGRICULTURAL SYSTEMS.

- (Proceedings)Delgado, J.A. 2004. Gis, modeling, and other innovative nutrient management tools that can be used to assess nitrorgen fertilizer use efficiency from agricultural systems. National Congress Mexican Society for Soil Science. CD-ROM.QUANTIFICATION OF THE NITROGEN LOSSES IN AGRICULTURAL SYSTEMS INCLUDING THE POTENTIAL USE OF A NITROGEN LEACHING INDEX TOOL TO ASSESS POTENTIAL IMPACTS TO GROUNDWATER

- (Proceedings)Delgado, J.A., Follett, R.F. 2004. Quantification of the nitrogen losses in agricultural systems including the potential use of a nitrogen leaching index tool to assess potential impacts to groundwater. National Congress Mexican Society for Soil Science. CD-ROM.YIELD AND QUALITY OF TWO US RED POTATOES: INFLUENCE OF NITROGEN RATE AND PLANT POPULATION

- (Proceedings)Essah, S., Holm, D., Delgado, J.A. 2004. Yield and quality of two US red potatoes: influence of nitrogen rate and plant population. Proceedings of the 4th International Crop Science Congress. Sept. 26-Oct. 1, 2004. Brisbane, Queensland, Australia. CD OM Publication.POTENTIAL USES OF PRECISION AGRICULTURE AND PRECISION CONSERVATION FOR IMPROVEMENTS IN NUTRIENT USE EFFICIENCY AND ENVIRONMENTAL CONSERVATION

- (Proceedings)Colon, W., Delgado, J.A. 2004. Potential uses of precision agriculture and precision conservation for improvements in nutrient use efficiency and environmental conservation. Proc. III Encuentro Cientifico International de Invierno.USE OF BEST MANAGEMENT PRACTICES AND A NITROGEN LEACHING INDEX TO MAXIMIZE N RECOVERY AND PROTECT GROUND WATER FOR HIGH RISK CROPPING SYSTEMS - LANDSCAPE CONBINATIONS SYSTEMS.

- (Proceedings)Delgado, J.A. 2004. Use of best management practices and a nitrogen leaching index to maximize n recovery and protect ground water for high risk cropping systems - landscape conbinations systems. Ontario Nitrogen Forum. CD-ROM.NITROGEN LEACHING MANAGEMENT

- (Peer Reviewed Journal)Meisinger, J.J., Delgado, J.A., Alva, A.K. 2006. Nitrogen leaching management. Encyclopedia of Soils in the Environment. 2: 1122-1124.TRACING THE FATE OF 15N IN A SMALL-GRAIN POTATO ROTATION TO IMPROVE ACCOUNTABILITY OF N BUDGETS.

- (Peer Reviewed Journal)Delgado, J.A., Dillon, M., Sparks, R., Follett, R.F. 2004. Tracing the fate of 15n in a small-grain potato rotation to improve accountability of N budgets.. Journal of Soil and Water Conservation. 59:271-276.EFFECTS OF POTATO-GRAIN ROTATIONS ON SOIL EROSION, CARBON DYNAMICS AND PROPERTIES OF RANGELAND SNADY SOILS

- (Proceedings)Al-Sheikh, Delgado, J.A., Barbarick, K., Sparks, R., Dillon, M., Qian, Y., Cardon, G. 2005. Effects of potato-grain rotations on soil erosion, carbon dynamics and properties of rangeland snady soils. J. Soil Tillage Research. 81:227-238.NITRATE LEACHING INDEX

- (Peer Reviewed Journal)Van Es, H.M., Delgado, J.A. 2004. Nitrate leaching index. Encyclopedia of Soil Science. p. 1-3.WINTER COVER CROPS

- (Peer Reviewed Journal)Delgado, J.A., Reeves, D.W., Follett, R.F. 2005. Winter cover crops. Encyclopedia of Soil Science. p. 1-3.NUTRIENT MANAGEMENT

- (Peer Reviewed Journal)Delgado, J.A., Lemunyon, J. 2006. Nutrient management. pp. 1157-1160. Rattan Lal, Editor. Marcel Decker, New York. Encyclopedia of Soil Science. p. 1924.LOW GROUND COVER FILTERING TO IMPROVE RELIABILITY OF NRI CORN N STATUS CLASSIFICATION

- (Peer Reviewed Journal)Schleicher, T.D., Bausch, W.C., Delgado, J.A. 2003. Low ground cover filtering to improve reliability of nri corn n status classification. Transactions of the ASAE.NITROGEN AND IRRIGATION MANAGEMENT PRACTICES TO IMPROVE NITROGEN UPTAKE EFFICIENCY AND MINIMIZE LEACHING LOSSES IN SOILS UNDER CITRUS

- (Peer Reviewed Journal)Alva, A.K., Paramasivam, S., Fares, A., Delgado, J.A., Mattos, Jr, D., Sajwan, K. 2004. Nitrogen and irrigation management practices to improve nitrogen uptake efficiency and minimize leaching losses in soils under citrus. Journal of Crop Improvement. 15:421-470.NUMERICAL MODELING TO STUDY THE FATE OF NITROGEN IN CROPPING SYSTEMS AND BEST MANAGEMENT CASE STUDIES

- (Peer Reviewed Journal)Delgado, J.A., Alva, A.K., Fares, A., Paramasivam, S., Mattos, Jr, D., Sajwan, K. 2004. Numerical modeling to study the fate of nitrogen in cropping systems and best management case studies. Journal of Crop Improvement. 15:369-420.GROUND-BASED SENSING OF PLANT NITROGEN STATUS IN IRRIGATED CORN TO IMPROVE NITROGEN MANAGEMENT

- (Peer Reviewed Journal)Bausch, W.C., Delgado, J.A. 2003. Ground-based sensing of plant nitrogen status in irrigated corn to improve nitrogen management. Crop Science Society Of America.EVALUATION OF EFFECTIVENESS OF CONSERVATION PRACTICES

- (Abstract Only)Delgado, J.A., Lemunyon, J., Busscher, W.J., King, A. 2003. Evaluation of effectiveness of conservation practices. American Society of Agronomy Abstracts. 95 CD-ROM.USE OF GEOSPACIAL INFORMATION FOR N MANAGEMENT AND PRODUCTION OF A HIGH QUALITY CROP

- (Abstract Only)Delgado, J.A. 2003. Use of geospacial information for n management and production of a high quality crop. American Society of Agronomy Abstracts. 95 CD-ROM.MASS BALANCES AND RELATIONSHIPS BETWEEN CARBON, NITROGEN, AND PHOSPOROUS POOLS IN HIGH ALTITUDE COARSER SANDY SOIL

- (Abstract Only)Al-Sheikh, Delgado, J.A., Barbarick, K., Sparks, R., Bowman, R., Cardon, G., Qian, Y. 2003. Mass balances and relationships between carbon, nitrogen, and phosporous pools in high altitude coarser sandy soil. American Society of Agronomy Abstracts. 95. CD-ROM.EVALUATION OF BEST MANAGEMENT PRACTICES ON N DYNAMICS FOR A NORTH CHINA PLAIN

- (Abstract Only)Hu, C., Delgado, J.A., Li, X. 2003. Evaluation of best management practices on n dynamics for a north china plain. American Society of Agronomy Abstracts. 95 CD-ROM.PRECISION CONSERVATION FOR ENVIRONMENTAL SUSTAINABILITY

- (Peer Reviewed Journal)Berry, J., Delgado, J.A., Khosla, R., Pierce, F. 2003. Precision conservation for environmental sustainability. 58:332-339.CARBON AND NUTRIENT CYCLES

- (Peer Reviewed Journal)DELGADO,J.A., FOLLETT,R.F., CARBON AND NUTRIENT CYCLES, JOURNAL OF SOIL AND WATER CONSERVATION, 2000. 57:455-464.NITROGEN FATE AND TRANSPORT IN AGRICULTURAL SYSTEMS

- (Peer Reviewed Journal)FOLLETT,R.F., DELGADO,J.A., NITROGEN FATE AND TRANSPORT IN AGRICULTURAL SYSTEMS, JOURNAL OF SOIL AND WATER CONSERVATION, 2002. 57:402-408.PRINCIPLES FOR MANAGING NITROGEN LEACHING

- (Peer Reviewed Journal)MEISINGER, J.J., DELGADO, J.A. PRINCIPLES FOR MANAGING NITROGEN LEACHING. JOURNAL OF SOIL AND WATER CONSERVATION. 2002.USE OF INNOVATIVE TOOLS TO INCREASE NITROGEN USE EFFICIENCY AND PROTECT ENVIRONMENTAL QUALITY FOR TEMPERATE AND TROPICAL REGIONS

- (Peer Reviewed Journal)Delgado, J.A., Bausch, W.C., Wright, D., Olivieri, L., Duke, H.R., Follett, R.F., Westfall, D., Dillon, M., Thompson-John, A. 2002. Use of innovative tools to increase nitrogen use efficiency and protect environmental quality for temperate and tropical regions. J. Stormwater. 3:48-56.PRINCIPLES FOR MANAGING NUTRIENT LEACHING

- (Abstract Only)USE OF SIMULATIONS FOR EVALUATION OF BEST MANAGEMENT PRACTICES ON IRRIGATED CROPPING SYSTEMS.

- (Book / Chapter)Delgado, J.A. 2001. Use of simulations for evaluation of best management practices on irrigated cropping systems. Book Chapter. In Modeling Carbon and Nitrogen Dynamics for Soil Management. p. 355-381. M.J. Shaffer, L. Ma, and S. hansen (eds). Lewis Publishers, Boca Raton, FL.USE OF INNOVATIVE TOOLS TO INCREASE NITROGEN USE EFFICIENCY AND PROTECT ENVIRONMENTAL QUALITY IN CROP ROTATIONS.

- (Peer Reviewed Journal)Delgado, J.A., Ristau, R.J., Dillon, M.A., Duke, H.R., Stuebe, A., Follett, R.F., Shaffer, M.J., Riggenbach, R.R., Sparks, R.T., Thompson, A. 2001. Use of innovative tools to increase nitrogen use efficiency and protect environmental quality in crop rotations. Communications in Soil Science and Plant Analysis. 32:1321-1354.POTENTIAL USE OF PRECISION FARMING TO IMPROVE NUTRIENT MANAGEMENT ON AN IRRIGATED POTATO-BARLEY ROTATION

- (Proceedings)Delgado, J.A., Duke, H.R. 2001. Potential use of precision farming to improve nutrient management on an irrigated potato-barley rotation. International Conference on Precision Agriculture Abstracts & Proceedings. CD-ROM.CONTROL OF N TRANSFORMATIONS TO INCREASE NITROGEN USE EFFICIENCY AND PROTECT ENVRIONMENTAL QUALITY, FOR JOURNAL OF EROSION CONTROL.

- (Peer Reviewed Journal)Delgado, J.A. 2000. Control of n transformations to increase nitrogen use efficiency and protect envrionmental quality. J. Erosion Control. 7:(5) 68-75.
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