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The Alien Plants Ranking System (APRS)
is a cooperative effort among the National Park Service,
Northern Arizona University, Ripon
College, University of Minnesota, and the U.S. Geological Survey.
APRS is a computer program that helps managers prioritize decisions concerning
invasive non-native plants. It is an analytic tool that can be used to:
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Separate harmless non-native plants from invasive, harmful
non-native plants at a site.
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Identify weeds that could impact a site in the future.
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Address control of each weed at a site so that control
costs can be weighted against the weeds' impact.
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