Nitrogen Index ToolEntry ID: USDA_ARS_NIT
Abstract: The effectiveness of nitrogen fertilizer in maximizing agricultural production and increasing economic returns for farmers has led to its widespread use. However, when this element is applied to a farming system, it can enter the surrounding environment via atmospheric, surface and leaching pathways. Consultants, extension agents, farmers, and other stakeholders need tools than can be used to ... quickly calculate the risk of nitrogen movement into the environment. The Nitrogen Index can assist users in making these assessments by integrating data on a series of management practices, weather conditions, soil characteristics and off-site factors. This tool has been tested using data from different agroecosystems across the United States, China, Mexico, Argentina, a Mediterranean region in Spain, and the Caribbean. It has performed well in comparing the effects of different management practices on nitrogen losses by distinguishing practices with high and very high risk levels from practices with medium, low and very low risk levels.
ISO Topic Category
Access Constraints Users must complete a form in order to download software.
Use Constraints The Nitrogen Index is a tool written in the programming language Java developed by Sun Microsystems®. The user must have the most recent version of Java installed to run the Nitrogen Index which can be downloaded for free from Java's website.
Role: TECHNICAL CONTACT
Email: jorge.delgado at ars.usda.gov
Natural Resources Research Center Building D
City: Fort Collins
Province or State: CO
Postal Code: 80526-8119
De Paz, J.M., J.A. Delgado, C. Ramos, M. J. Shaffer, and K. K. Barbarick. (2009), Use of a new Nitrogen Index?GIS assessment for evaluation of nitrate leaching across a Mediterranean region, J. Hydrol, 365, 183?194
Delgado, J.A., M. Shaffer, C. Hu, R.S. Lavado, J. Cueto Wong, P. Joosse, X. Li, H. Rimski? Korsakov, R. Follett, W. Colon and D. Sotomayor. (2006), A decade of change in nutrient management requires a new tool: A New Nitrogen Index., J. Soil Water Conserv, 61, 62A?71A
Delgado, J.A., M. Shaffer, C. Hu, R. Lavado, J. Cueto Wong, P. Joosse, D.Sotomayor, W. Colon, R. Follett, S. Del Grosso X. Li, and H. Rimski?Korsakov (2008), An index approach to assess nitrogen losses to the environment, Ecol. Eng, 32, 108?120
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