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dc.contributor.authorVisconti, Fernando
dc.contributor.authorDe-Paz, José M.
dc.contributor.authorRubio, José L.
dc.date.accessioned2017-06-01T10:10:52Z
dc.date.available2017-06-01T10:10:52Z
dc.date.issued2012
dc.identifier.citationVisconti, F., de Paz, J.M., Rubio, J.L. (2012). Choice of selectivity coefficients for cation exchange using principal components analysis and bootstrap anova of coefficients of variation. European Journal of Soil Science, 63(4), 501-513.
dc.identifier.issn1351-0754
dc.identifier.urihttp://hdl.handle.net/20.500.11939/4732
dc.description.abstractModellers of the exchange of sodium, potassium, calcium and magnesium in soils have to choose from up to six different equations based on the mass action law paradigm (mainly Gapon, Vanselow, Gaines-Thomas and Kerr) and up to six different binary cation combinations. In this article a methodology to choose the most appropriate equation and binary cation combinations is presented. The combination of six equations with six binary cation combinations resulted in 36 selectivity coefficients. Each one of these was assessed for 133 calcareous illitic soil samples. Six principal components analyses (PCA) were carried out to find out which three binary cation combinations accounted most for the variance of the soil exchange selectivity. Then a bootstrap anova and multiple comparison (MC) procedure with orthogonal contrasts were carried out to compare the coefficients of variation of the selectivity coefficients calculated with each equation. According to the PCA, the three binary cation combinations involving calcium, and expressed with whichever of the equations of Kerr, Vanselow and Gaines-Thomas, accounted most efficiently for the variance of the soil exchange selectivity. According to the bootstrap anova and MC analysis, the Gapon equations, either in analytical concentrations or activities of aqueous cations, provide significantly larger coefficients of variation than the equations of Kerr (either in analytical concentrations or activities of aqueous cations), Vanselow and Gaines-Thomas. The use of the Kerr, Vanselow or Gaines-Thomas equations and the three binary cation combinations involving calcium resulted in the most effective way of modelling the exchange equilibria of sodium, potassium, calcium and magnesium in calcareous illitic soils.
dc.language.isoen
dc.titleChoice of selectivity coefficients for cation exchange using principal components analysis and bootstrap anova of coefficients of variation
dc.typearticle
dc.authorAddressInstituto Valenciano de Investigaciones Agrarias (IVIA), Carretera CV-315, Km. 10’7, 46113 Moncada (Valencia), Españaes
dc.date.issuedFreeFormAUG 2012
dc.entidadIVIACentro para el Desarrollo de la Agricultura Sostenible
dc.identifier.doi10.1111/j.1365-2389.2012.01474.x
dc.journal.abbreviatedTitleEur.J.Soil Sci.
dc.journal.issueNumber4
dc.journal.titleEuropean Journal of Soil Science
dc.journal.volumeNumber63
dc.page.final513
dc.page.initial501
dc.rights.accessRightsopenAccess
dc.source.typeImpreso


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