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nitrate(23)
denitrification(12)
nitrification(6)
anammox(3)
nitrate leaching(3)
nitrogen deposition(3)
nitrous oxide(3)
water quality(3)
ammonium(2)
climate change(2)
fluvial nitrogen(2)
groundwater(2)
lake(2)
lake superior(2)
nitrate removal(2)
nitrogen(2)
nitrogen cycling(2)
rain-on-snow(2)
restoration(2)
riparian zone(2)
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