Projects

MANAGEMENT PRACTICES TO MITIGATE GLOBAL CLIMATE CHANGE, ENHANCE BIO-ENERGY PRODUCTION, INCREASE SOIL-C STOCKS & SUSTAIN SOIL PRODUCTIVITY... Appropriated (D)   Accession Number: 419520

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

The implementation of the new Kentucky nitrogen and phosphorus index to reduce agricultural nonpoint source pollution - (Proceedings)

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.

Climate Change and Agriculture: Effects and Adaption - (Government Publication) - (28-Sep-12)

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.

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) - (25-May-11)

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.

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.

A GIS Assessment to Identify and Reduce Nitrate Loads that Contribute to Hypoxia in the Gulf of Mexico - (Abstract Only) - (26-Apr-11)

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.

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.

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.

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.

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.

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.

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).

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.

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.

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.

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.

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).

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.

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/

A New GIS-Nitrogen Trading Tool Concept to Minimize Reactive Nitrogen losses to the Environment - (Abstract Only) - (11-Jul-08)

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) - (11-Jul-08)

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.

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.

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.

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.

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.

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.

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. 60:402-410

USE 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 PRAG276-04

NITROGEN 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.

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.

NITRATE LEACHING INDEX - (Peer Reviewed Journal)

Van Es, H.M., Delgado, J.A. 2004. Nitrate leaching index. Encyclopedia of Soil Science. p. 1-3.

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.

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.

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.

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.

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.

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.

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) - (11-Sep-01)

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.