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July 30-150-Mindy Selman
The Nutrient Tracking Tool (NTT) is an online tool for estimating nutrient and sediment losses from crop and pasture lands. It was developed to facilitate water quality trading and has other applications such as education, planning, and research. NTT uses the Agricultural Policy Environmental eXtender (APEX) model along with national soil and climate data. Site-level calibration has been completed for some regions including Ohio/Great Lakes and Minnesota. The tool allows users to create scenarios for fields and compare nutrient loss and yield results.
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July 30-150-Mindy Selman
- 1. OEM Office of EnvironmentalMarkets The Nutrient Tracking Tool (NTT) Mindy Selman USDA Office of Energy and Environmental Policy mseman@oce.usda.gov Ali Saleh Texas Institute for Applied Environmental Research (TIAER) Tarleton State University saleh@Tarleton.edu
- 2. About NTT NTT isan online, field-scale tool for estimating N, P and sediment losses from crop and pasture lands. ntt.tiaer.tarleton.edu Slide 2
- 3. History of NTT •Developed to facilitate Water Quality Trading • Prototyped by Texas Institute for Applied Environmental Research (TIAER) and NRCS in 2008 – 2010 • OEEP/OEM worked to TIAER to develop the current version of NTT which is national in scope and represents the 3rd generation of NTT Slide 3
- 4. Purpose of NTT •OEEP/OEM supported development of NTT as the science tool behind water quality trading • Other applications: – Corporate sustainability/Supply chain sust. – Education & outreach – Planning – Research & analysis Slide 4
- 5. Let’s get technical… •NTT uses the Agriculture Policy Environmental eXtender (APEX) model • Data used by APEX – National Soils Database (SSURGO) – PRISM climate database – 30m resolution DEM data (to estimate slope) Slide 5
- 6. Tailoring APEX toRegional Conditions • 2 phases of parameterization – 1. State-level parameterization using publically available data (e.g. yield). – 2. Parameterizaiton using local field-scale data (where available) • Phase 1 is completed • Site-level parameterization completed for Ohio/Great Lakes and Minnesota. Working on several others. • Regions that have not yet been fine-tuned are using phase 1 parameters Slide 6
- 7. OEM Office of EnvironmentalMarkets NTT Verification Site Level Example for Minnosota Slide 7
- 8. Half Century Farm,Blue Earth County, MN • A 14.3 acre surface watershed and 28.2 acre subsurface tile drainage watershed in a corn-soybean crop rotation with swine manure application production. • Using the measured weather • Land use management data obtained from local area • Soil Data for 3 major soil types within the field was obtained from SSURGO from USDA-NRCS via NTT site • Slope was calculated from 30-m resolution DEM Slide 8
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- 10. Predicted and MeasuredYield Slide 10 0 50 100 150 200 250 Corn Average5-YearCropYield(lb/ac) Measured Simulated
- 11. Predicted and MeasuredN Loss Slide 11 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 Surface Tile Average5-YearN(lbs/ac) Measured Simulated
- 12. Predicted and MeasuredP Loss Slide 12 0.00 0.10 0.20 0.30 0.40 0.50 0.60 Surface Tile Average5-YearP(lbs/ac) Measured Simulated
- 13. OEM Office of EnvironmentalMarkets NTT Program Screen Shots Slide 13
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- 22. NTT Results • Aftercreating one or more scenarios for a field, user can view and compare results. • NTT displays nutrient and sediment losses at the “edge of the field” as well as estimated yields. • Results can be viewed in tabular format, or graphical formats (annual or monthly averages). Slide 22
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- 26. OEM Office of EnvironmentalMarkets Question and Comments Slide 26
Editor's Notes
- #17 Once selecting a field, user is directed to the soils page where they will indicate the soil P (if known). User can also view the soils returned by the SSURGO database. Only the top 3 soils are returned in order to optimize running time. Organic matter values are from SSURGO but can be edited by the user if desired. Slope is calculated using the Digital Elevation Model layer in the map.
- #18 Once clicking continue from the soils page, user is asked to create one or more management scenarios for the field. User can delete or copy management scenarios from this field or from other fields. Once a management scenario has been created (described in next 3 slides), the user must simulate the scenario from this page by clicking “simulate selected scenario”…this sends the data to the APEX model which returns the results. Results can be viewed by clicking “view results”
- #19 After creating a scenario, user will describe the crop schedule and conservation practices for that scenario. To begin building a crop schedule, user will select one or more crops from the drop down list, specifying the tillage type and the planting year.
- #20 Once a crop is added, NTT populates the crop schedule with default operations including plating date, fertilizer applications, tillage operations (based on type of tillage selected), and harvest dates. These operations can be deleted or modified. In addition, user may add additional operations. (for instance, if user selects pasture, they would add grazing operations. User may also add additional fertilizer applications, additional tillage oeprations, manual irrigation, liming, burning, etc.)
- #21 User may chose to edit an operation. For example, change the type or amount of fertilizer applied. Here user may chose to incorporate fertilizer by selecting a depth. They can change from commercial to manure fertilizer, change the rate of application, the date of application, etc.
- #22 User can select from several different structural conservation practices. Depending on practice selected, user may have to provide additional information (for example, type of vegetation in a buffer strip, width of strip, etc.). User may select one or more conservation practices. Or none.
- #24 Once a scenario has been simulated, Results can be viewed tabular, or annual and monthly charts. Up to three scenarios can be compared for each field. In tabular view, user can expand categories on the left to view detailed information. Crop yield is given for each scenario.
- #25 Annual charts show the results for the three given scenarios for the past 12 years. Annual results show the simulated results for the given scenario in the given year and do not represent a long-term average. User can select from several different chart types (TN, TP, runoff N, yield, precipitation, etc.)
- #26 Monthly charts show the 35-year monthly average loss for the given constituent (e.g. Runoff N seen in this view).