Phosphorus export from an agricultural watershed: linking source and transport mechanisms.

  title={Phosphorus export from an agricultural watershed: linking source and transport mechanisms.},
  author={Richard William McDowell and Andrew N. Sharpley and Gordon J. Folmar},
  journal={Journal of environmental quality},
  volume={30 5},
Many source and transport factors control P loss from agricultural landscapes; however, little information is available on how these factors are linked at a watershed scale. Thus, we investigated mechanisms controlling P release from soil and stream sediments in relation to storm and baseflow P concentrations at four flumes and in the channel of an agricultural watershed. Baseflow dissolved reactive phosphorus (DRP) concentrations were greater at the watershed outflow (Flume 1; 0.042 mg L(-1… 

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