• NTT - Nutrient Tracking Tool (Version 26-05)
Important Message

This is our new tool tip!

  1. Home
  2. Help

NTT Table of Contents

Overview
  1. About NTT
  2. Contact Information
Getting Started
  1. System Requirements
  2. Navigation Basics
  3. Project Page
  4. Location Page
  5. Fields Page
  6. Soils Page
  7. Weather Page
  8. Management Page
  9. Operation Page
  10. Conservation Practices Page
  11. Results Page
  12. Field Routing Page
  13. NTT FARM Economic Model (FEM)
  14. Modification Help Page

  • Language EnglishSpanish
  • Page Instructions
  • NTT References
  • NTT User Manuals
  • Validation
  • Help
  • FAQ
  • Contact Us
Help Page

This page helps the user to navigate various tools in this website. The user can learn about NTT and its fuctions, which are built into the website, by clicking various topics listed in the page.
About NTT: This Page provides basic concept about NTT.
Contact Information: This page provides contact informations if any question or support.
System Requirements: This page provides information on what requirements user should have inorder to run NTT.
Navigation Basics: This page provides navigation on various other pages linked on this website.
Project Page: This page provides information on the Project screen.
Location Page: This page provides information on the Location screen.
Fields Page: This page provides information on the Fields screen.
Soils Page: This page provides information on the Soils screen.
Weather Page: This page provides information on the Weather screen.
Management Page: This page provides information on the Management screen.
Watershed Page: This page provides information on the Watershed screen.
Simulation Page: This page provides information on the Simulation screen.
Results Page: This page provides information on the Results screen.
APEX Files Page: This page provides information on making modifications and downloading APEX folder.
APEX: This page provides information on APEX.
NTT Disclaimer: This page is about NTT Disclaimer.

Click < Prev to go to the previous page.
Click Next > to go to the next page.
Click Return to Table of Contents to go to the NTT Table of Contents.
NTT References

Gassman, P. W., Williams, J. R., Wang, X., Saleh, A., Osei, E., Hauck, L. M., Izaurralde, R. C., Flowers, J. D. (2010). The Agricultural Policy/Environmental eXtender (APEX) model: An emerging tool for landscape and watershed environmental analyses. Transactions of the ASABE.


Tuppad, P., Santhi, C., Wang, X., Williams, J. R., Srinivasan, R., & Gowda, P. H. (2010). Simulation of conservation practices using the APEX model. Applied Engineering in Agriculture


Saleh, A., Gallego, O., Osei, E., Lai, H., Gross, C., & McKinney, S. (2010). Development and Application of a Modified NTT Tool for Water Quality Trading. In 21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica (p. 1). American Society of Agricultural and Biological Engineers.


Saleh, A., Gallego, O., Osei, E., Lal, H., Gross, C., McKinney, S., & Cover, H. (2011). Nutrient Tracking Tool—a user-friendly tool for calculating nutrient reductions for water quality trading. Journal of Soil and Water Conservation, 66(6), 400-410.


Saleh, A., Osei, E., & Gallego, O. (2012). Evaluating Nutrient Tracking Tool(NTT) and simulated conservation practices. In 21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, May 27-June 1, 2012, Bari, Italy (p. 1). American Society of Agricultural and Biological Engineers.


Lal, H. (2014). The Nutrient Tracking Tool--A Historical Perspective and a Look to the Future. Resource Magazine, 21(3), 20-23.


Saleh, A., Gallego, O., & Osei, E. (2015). Evaluating nutrient tracking tool and simulated conservation practices. Journal of Soil and Water Conservation. https://doi.org/10.2489/jswc.70.5.115A.


Saleh, A., Osei, E., & Gallego, O. (2015). Evaluating Nutrient Tracking Tool and simulated conservation practices. Journal of Soil and Water Conservation. 115AJULY/AUGUST 2015 —VOL. 70, NO. 4


Burnett, J. R. (2015). Validation and verification of the Nutrient Tracking Tool for Yakima County, Washington. Tarleton State University.


Saleh, A., Niraula, R., Gallego, O., Osei, E., & Kannan, N. (2017, December). Nutrient Tracking Tool-A user-friendly tool for evaluating the water and air quality and quantity as affected by various agricultural management practices. In AGU Fall Meeting Abstracts.


Saleh A. and Edward Osei. 2018. Precision and water quality markets. Book chapter. Precision conservation. Agronomy Monograph. Pp.313-339.


Saleh, A., Niraula, R., Marek, G.W., Gowda, P.H., Brauer, D.K., Howell, T.A. 2018. Lysimetric evaluation of the APEX Model to simulate daily ET for irrigated crops in the Texas High Plains. Transactions of the ASABE. 61(1):65-74. https://doi.org/10.13031/trans.11938.


Nelson, A. M., Moriasi, D. N., Talebizadeh, M., Tadesse, H. K., Steiner, J. L., Gowda, P. H., & Starks, P. J. (2019). Comparing the Effects of Inputs for NTT and ArcAPEX Interfaces on Model Outputs and Simulation Performance. Journal of Water Resource and Protection, 11(5), 554-580.


Guo, T., Confesor Jr, R., Saleh, A., & King, K. (2020). Crop growth, hydrology, and water quality dynamics in agricultural fields across the Western Lake Erie Basin: Multi-site verification of the Nutrient Tracking Tool (NTT). Science of The Total Environment, 138485.

User Manuals and Technical Documentation


NTT/User Manual

NTT Technical Documentation

Economic Technical Documentation

APEX User Manual
  • Site Validation Experimental (Farm)

    Verification of APEX Parameters and NTT for Minnesota
    NTT Comparison to COBS Iowa
    Crop growth, hydrology, and water quality dynamics in agricultural fields across the Western Lake Erie Basin: Multi-site verification of the Nutrient Tracking Tool (NTT)

  • State Level Validation

    Alabama
    Arizona
    Arkansas
    California
    Colorado
    Delaware
    Georgia
    Idaho
    Illinois
    Indiana
    Iowa
    Kentucky
    Michigan
    Minnesota
    Mississippi
    Missouri
    Montana
    Nevada
    New Hampshire
    New Mexico
    New York
    North Carolina
    Ohio
    Oklahoma
    Oregon
    Pennsylvania
    Rhode Island
    South Carolina
    South Dakota
    Tennessee
    Texas
    Utah
    Vermont
    Virginia
    West Virginia
    Wisconsin
    Wyoming

Contact Information

For questions or comments regarding the Nutrient Tracking Tool (NTT), please contact:

  • Ali Saleh
  • Executive Director
    P.O. Box T410
    Tarleton State University
    Stephenville, TX 76402
    (254)-968-9079 (Phone)
    (254)-968-9790 (Fax)
    saleh@tarleton.edu

For technical questions or comments regarding the Nutrient Tracking Tool (NTT), please contact:

  • Oscar Gallego
  • IT Manager II
    P.O. Box T410
    Tarleton State University
    Stephenville, TX 76402
    (254)-968-9787 (Phone)
    (254)-968-9790 (Fax)
    gallego@tarleton.edu