Projects

Improving Soil and Nutrient Management Systems for Sustained Productivity and Environmental Quality Appropriated (D)   Accession Number: 410759

Publications

Chlorophyll Meter SPAD-502 Calibration to Evaluate Nitrogen Requirements in Forage Corn - (Peer Reviewed Journal) - (29-Aug-09)

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)

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)

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.

A New Nitrogen Index: An Adaptive Management Tool for Reducing Nitrogen Losses to the Environment from Mexican Forage Production Systems - (Abstract)

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)

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.

Adaptive management and the USDA-NRCS Nutrient Management (590) conservation practice standard - (Abstract)

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.

Nleap-Gis Modeling in a Mediterranean Region of Spain - (Proceedings/Symposium)

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.

Use of Isotopic 15n Techniques to Assess Recovery and Losses of N from Application of Organic and Inorganic N Sources to a Forage Rotation - (Peer Reviewed Journal) - (20-Apr-09)

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).

Using Cover Crops and Cropping Systems for Nitrogen Management - (Book/Chapter) - (19-Feb-09)

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., Barbaarick, 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/Symposium)

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) - (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) - (11-Jul-08)

New Advances and Practices for Precision Conservation - (Proceedings/Symposium)

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) - (01-Jul-08)

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)

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)

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) - (07-Dec-07)

Evaluation of Best Nitrogen Management Practices Across Regeions of Argentina and Spain - (Book/Chapter) - (07-Dec-07)

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)

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)

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/Symposium)

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)

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)

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)

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/Symposium)

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/Symposium)

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)

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)

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/Symposium)

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/Symposium)

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/Symposium)

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/Symposium)

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/Symposium)

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/Symposium)

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/Symposium)

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.

Evaluation of Effectiveness of Conservation Practices - (Abstract)

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)

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)

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)

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.