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. Author manuscript; available in PMC: 2019 Jun 1.
Published in final edited form as: Freshw Sci. 2018 Jun 1;37:208–221. doi: 10.1086/697966

Fig. 7.

Fig. 7

Top 10 variables ranked by their importance to the model (mean decrease in model accuracy). PctAg2011Ws = % of the watershed consisting of agriculture (cropland and hay classes of 2011 National Land Cover Dataset); Pestic97Cat and Pestic97Ws = mean 1997 pesticide use (kg/km2) within catchment and watershed, respectively; FertCat and FertWs = mean rate of synthetic N fertilizer application to agricultural land (kg N ha–1 y–1) within catchment and watershed, respectively; AgKffactWs = mean erodibility factor (unitless) of soils on agricultural land within the watershed; BFICat and BFIWs = mean of US Geological Survey base-flow raster within catchment and watershed, respectively; PctConif2011Ws = % of the watershed composed of coniferous forest (2011 NLCD); CBNFWs = mean rate of biological N2 fixation from the cultivation of crops (kg N ha–1 y–1) within the watershed.