NTT is a web-based, site-specific application that estimates nutrient and sediment losses for crop and pasture at the field and/or watershed scales. Agricultural producers and land managers can define a number of management scenarios for any given field or area of interest (AOI). NTT will estimate nutrient (nitrogen and phosphorus) losses, sediment losses, and crop yields differences between the scenarios and present results in customizable reports. NTT estimates are made using the APEX (Agricultural Policy/Extender; Williams et al. 2010) (Version 0806) model (Williams et al. 2000). Results represent average nutrient and sediment losses from the field based on 35 years of simulated weather. NTT was developed by the Texas Institute for Applied Environmental Research (TIAER) at Tarleton State University with funding and technical support from USDA’s Office of Environmental Markets. Additional funding for development of NTT was provided by NIFA, the USDA Conservation Innovation Grants program, and various state governments.
Last updated: 16 Feb 2018
The information contained in NTT (Nutrient Tracking Tool) has been tested for use in the Ohio counties surrounding Lake Erie, in the Mississippi Delta, Missouri, Yakima County in the State of Washington, the northern portion of Oregon, Maryland, Delaware, Pennsylvania, Virginia, Puerto Rico, and Sonoma County in California. Because your area of interest may contain unique features, the program may not provide the appropriate results in your area when model default parameters are used. All input data and results should be carefully reviewed as errors or omissions in the input data may lead to misleading outcomes. We are currently in the process of completing the testing and validating NTT across the US (this page will be updated accordingly as new information becomes available).
If you have questions regarding the application of NTT or are interested in having it calibrated and validated for your area, please contact Dr. Ali Saleh at (254)592-1975 (email@example.com) or Ms. Mindy Selman at (202) 401-0531 (firstname.lastname@example.org).
Finally, although NTT has been tested by its developers, NO warranty, expressed or implied, is made as to the validity of the results and functioning of the program and related program material, nor shall the fact of distribution constitute any such warranty; and NO responsibility is assumed by the developers in connection therewith. The user assumes all risks and responsibilities for the use and application of NTT and interpretation of the results generated from the tool. The authors and their affiliated institution, TIAER, Tarleton State University, and any other U.S. Government agencies will NOT be liable to NTT users for any damage, including lost profits, lost savings, lost time, actions by regulatory agencies, or any other direct or indirect incidental or consequential damages occurring from the use of or inability to use NTT, its databases, its results, or its documentation for any purpose.
Nutrient Tracking Tool (NTT): General Description×