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Corn cobs may perform better than woodchips to reduce nitrates in water quality bioreactors and for a lesser cost state Iowa State University researchers. The challenge is getting

United statesStory cityIowa state universityGary feyereisenTom moormanMorgan davisTom isenhartNatural resources conservation serviceAgronomy research farmAgricultural research serviceIowa state university michelle soupirAnn robinson iowa state universitySchool of natural resourcesUniversity of missouriState universityMichelle soupir