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USGS: #Streams may be polluted for decades by #nitrates from past farming. http://t.co/wDT8rNT8eM
USGS: #Streams may be polluted for decades by #nitrates from past farming. http://t.co/wDT8rNT8eM
Vulnerability of Streams to Legacy Nitrate Sources - Environmental Science & Technology (ACS... http://t.co/cL0z4JEqN9
@WaterWired @USGS Thanks! Working on a post-fire N manuscript w @SRWP_H2O in a region w large GW component. Valuable. http://t.co/Jfvhomzp58
@USGS Nitrate ('legacy') carried by GW takes decades to reach streams. http://t.co/4aoKmcPRp5