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dc.contributor.supervisor Tenuta, Mario (Soil Science) en
dc.contributor.author Welsh, Catherine M.
dc.date.accessioned 2007-03-28T13:12:06Z
dc.date.available 2007-03-28T13:12:06Z
dc.date.issued 2007-03-28T13:12:06Z
dc.identifier.uri http://hdl.handle.net/1993/312
dc.description.abstract A 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.extent 1174378 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject Hedley en
dc.subject extraction en
dc.subject spore en
dc.subject arbuscule en
dc.title Organic crop management can decrease labile soil P and promote mycorrhizal association of crops en
dc.type info:eu-repo/semantics/masterThesis
dc.degree.discipline Soil Science en
dc.contributor.examiningcommittee Entz, Martin (Plant Science) Flaten, Don (Soil Science) Grant, Cynthia (Agriculture and Agri-Food Canada) en
dc.degree.level Master of Science (M.Sc.) en
dc.description.note May 2007 en


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