Abstract:Old, abandoned feedlots may serve as a source of nutrients that can degrade groundwater and downstream water quality. We characterized the distribution and concentration of nutrients at the Crookston Cattle Company feedlot (northwest Minnesota, USA), 15 years after it ended operations in 1999. O in groundwater nitrate ranging up to +44 and +30‰, respectively, suggest denitrification as the cause, rather than either nitrate transport from the site or dilution. Phosphorus, with soil B-horizon concentrations as m… Show more
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