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Changes in Soil Test Phosphorus and Phosphorus Forms with Continuous Phosphorus Fertilizer Addition to Contrasting Prairie Soils

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dc.contributor.supervisor Wole, Akinremi (Soil Science) en_US
dc.contributor.author Obikoya, Oluwatoyin
dc.date.accessioned 2016-09-14T00:23:50Z
dc.date.available 2016-09-14T00:23:50Z
dc.date.issued 2016
dc.identifier.uri http://hdl.handle.net/1993/31736
dc.description.abstract Application of phosphorus fertilizer can lead to changes in soil test P and increase both labile and non-labile phosphorus pools. Sequential fractionation showed that the labile (H2O-P and NaHCO3-P) fractions significantly (P < 0.05) increased with the addition of phosphorus fertilizer across all sites. Significant increase was observed in the non-labile (NaOH-P, HCl-P and Residual-P) fractions during the accumulation phase. During the depletion phase, when no further P was added, the accumulated P in the labile P fractions declined but not to the original level. The rates of P application, soil properties, soil test P methods used and time effect all had significant effects on soil test P changes in the extraction experiment. Mehlich-3 extracted the greatest amount of P from the two depths and Olsen-P was intermediate while the smallest amount was extracted with water. The pattern of the rate of change in extractable P with P addition for the 0 – 7.5 cm depth was not site dependent as the results obtained at the different sites were similar. en_US
dc.subject Soil test Phosphorus en_US
dc.subject Phosphorus forms en_US
dc.subject Phosphorus fertilizer en_US
dc.subject Sequential fractionation en_US
dc.subject Extraction en_US
dc.title Changes in Soil Test Phosphorus and Phosphorus Forms with Continuous Phosphorus Fertilizer Addition to Contrasting Prairie Soils en_US
dc.degree.discipline Soil Science en_US
dc.contributor.examiningcommittee Cynthia, Grant (Agriculture and Agri-Food Canada) Don, Flaten (Soil Science) Yvonne, Lawley (Plant Science) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note October 2016 en_US


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