NuGIS: a Nutrient Use Geographic Information System March
29-31, 2011 Denver, Colorado Paul Fixen Ryan Williams and Quentin
Rund
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IPNI vision for NuGIS widely acceptedProvide a widely accepted
source of spatially defined N, P, and K data on nutrient removal by
crops, fertilizer nutrient use, biological N fixation, and manure
nutrients credible, transparent, up-to-date, and easily accessible
greatest accuracy By creating a credible, transparent, up-to-date,
and easily accessible database and graphical interface that
delivers estimates with the greatest accuracy existing data sources
will allow. Expected outcomes: Guidance in nutrient management
education Guidance in nutrient management education and marketing
of services and products. more current nutrient use and removal
information Incorporation of more current nutrient use and removal
information in water quality and N emission modeling efforts.
Improved integration of agronomic and environmental factors
Improved integration of agronomic and environmental factors in
policy development involving plant nutrients. Identification of
weaknesses Identification of weaknesses in supporting data and
greater support for improvement.
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Status of NuGIS: between preliminary and Version 1.0
ModelingSummit3/29/2011 XXXXXXX Critiques & stakeholder input
Released July, 2010 3 rd Quarter, 2011
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NuGIS NuGIS output and basic methodology N, P and K maps down
to the county and watershed level for: Nutrient balances and
removal to use ratios 1987-2007, periodic updating as data sets
become available Nutrient inputs (left side): Fertilizer applied on
farms - AAPFCO sales data when available Interpolated among
counties When county AAPFCO not available, state total partitioned
to counties using Ag Census fertilizer and lime expenditures Manure
nutrients Livestock numbers: USDA-Ag Census Estimates of excretion
and recoverability: USDA-NRCS (Kellogg, others) Nutrients in
harvested crops (right site) Crop production (3-yr average i.e.
2007=2006-2008): USDA-NASS Currently 21 crops Nutrient removal
coefficients: IPNI County data transformed to 8-digit hucs
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Estimated P removal to use ratio by watershed, 2007 (8-digit
hydrologic unit) Using interpolated county level fertilizer
sales
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P removal to use ratio by 8-digit hydrologic unit 1987
2007
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NuGIS Interactive Mapping www.ipni.net/NuGIS
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Watershed P Balance
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Estimation improvements underway Inputs Efforts with AAPFCO on
more consistent fertilizer sales data reporting Efforts with USDA
(Census) on improved nutrient-specific data Refinement of county
fertilizer sales data interpolation Systematic estimation of animal
units for non-census years Refinement of confinement and
recoverability factors Removal Collect production data on more
crops where needed Eliminate need for state adjustment factors for
nearly all states Use spatially variable nutrient removal
coefficients where justified Refinement of the conversion from
counties to watersheds
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Examples of output use Prediction of use impacts on soil
nutrient levels Guidance in addressing water quality problems
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Annual change in median soil P level for 12 Corn Belt states as
related to state P balance, 2005-2009. *NuGIS is a GIS nutrient
balance model (IPNI, 2010). A balanced budget gives no net change
in soil P
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http://water.usgs.gov/nawqa/digmap.htmlhttp://water.usgs.gov/nawqa/digmap.html
(3/24/2011) Comparison of total P incremental yield predicted by
SPARROW to NuGIS P removal to use ratio Sparrow Total P Incremental
Yield NuGIS P Removal to Use Ratio, 2007 Watersheds with high
predicted P yield often have high crop P removal to use ratios. In
such cases, P yield reduction will likely be difficult to achieve
with P use reduction.
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This is considered a preliminary publication and process the
final will incorporate stakeholder input www.ipni.net/NuGIS 1)
Bulletin pdf 2) On-line tool 3) Comments to: [email protected]