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dc.contributor.authorSöderström, Mats
dc.contributor.authorPiikki, Kristin
dc.contributor.authorCordingley, Jeremy
dc.date.accessioned2016-08-31T19:41:01Z
dc.date.available2016-08-31T19:41:01Z
dc.date.issued2016
dc.identifier.citationSöderström, Mats; Piikki, Kristin; Cordingley, Jeremy. 2016. Improved usefulness of continental soil databases for agricultural management through local adaptation . South African Journal of Plant and Soil 1-11 p.en_US
dc.identifier.issn0257-1862
dc.identifier.urihttps://hdl.handle.net/10568/76687
dc.description.abstractThe usefulness of a continental digital soil map (AfSoilGrids250) was investigated at two levels relevant for agricultural fertiliser recommendations in Rwanda (point locations and administrative sector unit averages). Analysis of 900 soil samples for pH and soil organic carbon (SOC) revealed that fine spatial resolution in digital soil maps can be misleading. In order to promote accurate use of such maps, adequate information must be provided to allow users to assess whether a map is suitable for an intended use. In tests to improve the continental database locally at the levels examined in this study, regression kriging of SOC and pH from the continental data set with only 100 soil samples was found to reduce errors, and the predictions better resembled those in the ‘ground truth’ data set. The improved map was better for administrative sector averages than point locations and was more pronounced for SOC than for pH. As the use of digital soil maps becomes more widespread, it is important to clearly communicate map accuracy for a range of extents and application levels. A list of basic guidelines to facilitate usage and understanding of digital soil maps is presented in which we emphasise the importance to assess uncertainty and accuracy.en_US
dc.format.extent1-11 p.en_US
dc.language.isoenen_US
dc.publisherNational Inquiry Services Centreen_US
dc.sourceSouth African Journal of Plant and Soilen_US
dc.subjectCARTOGRAPHYen_US
dc.subjectSIMULATION MODELSen_US
dc.subjectPHen_US
dc.subjectSTATISTICAL ANALYSISen_US
dc.subjectDATABASESen_US
dc.subjectRWANDAen_US
dc.subjectCARTOGRAFÍAen_US
dc.subjectMODELOS DE SIMULACIÓNen_US
dc.subjectANÁLISIS ESTADÍSTICOen_US
dc.subjectBASES DE DATOSen_US
dc.titleImproved usefulness of continental soil databases for agricultural management through local adaptationen_US
dc.description.versionPeer Reviewen_US
dc.typeJournal Articleen_US
cg.subject.ciatSOIL INFORMATIONen_US
cg.identifier.statusOpen Accessen_US
cg.identifier.doihttps://dx.doi.org/10.1080/02571862.2016.1166400en_US
cg.isijournalISI Journalen_US
cg.coverage.regionAFRICAen_US
cg.coverage.regionCENTRAL AFRICAen_US
cg.coverage.countryRWANDAen_US
cg.creator.idMats Söderström: 0000-0001-9946-0979
cg.creator.idKristin Piikki: 0000-0003-2120-4486


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