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dc.contributor.supervisorTenuta, Mario (Soil Science)en
dc.contributor.authorWelsh, Catherine M.
dc.date.accessioned2007-03-28T13:12:06Z
dc.date.available2007-03-28T13:12:06Z
dc.date.issued2007-03-28T13:12:06Z
dc.identifier.urihttp://hdl.handle.net/1993/312
dc.description.abstractA concern with organic farming is for the depletion of soil phosphorus. The objectives of this study were to determine which organic management systems deplete soil phosphorus and whether arbuscular mycorrhizal fungi (AMF) could assist crops in taking up phosphorus in these systems. The research site was a 14 year-old study at Glenlea, Manitoba, having 3 different 4-year rotations under organic and conventional management: forage-grain ± manure-compost, grain-only, and a restored tall grass prairie. The modified Hedley procedure revealed organic systems to have lower concentrations of labile phosphorus than conventional but recalcitrant fractions did not differ (P < 0.05). Nitrogen was limiting in the organic grain-only rotation; phosphorus in the organic forage-grain. Mycorrhizal colonization as arbuscules was higher in organic than conventional systems (P < 0.05). To prevent phosphorus limitation, we suggest high-export organic rotations be balanced with sufficient rates of manure-compost and AMF maintained to help with phosphorus absorption.en
dc.format.extent1174378 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoengen_US
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectHedleyen
dc.subjectextractionen
dc.subjectsporeen
dc.subjectarbusculeen
dc.titleOrganic crop management can decrease labile soil P and promote mycorrhizal association of cropsen
dc.typeinfo:eu-repo/semantics/masterThesis
dc.typemaster thesisen_US
dc.degree.disciplineSoil Scienceen_US
dc.contributor.examiningcommitteeEntz, Martin (Plant Science) Flaten, Don (Soil Science) Grant, Cynthia (Agriculture and Agri-Food Canada)en
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.noteMay 2007en


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