Soil Organic Carbon Baselines for Land Degradation Neutrality: Map Accuracy and Cost Tradeoffs with Respect to Complexity in Otjozondjupa, Namibia

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cg.contributor.affiliationInternational Center for Tropical Agriculture
cg.coverage.countryNamibia
cg.coverage.iso3166-alpha2NA
cg.coverage.regionAfrica
cg.coverage.regionSouthern Africa
cg.creator.identifierRavic Nijbroek: 0000-0002-3748-8973
cg.creator.identifierKristin Persson: 0000-0003-2120-4486
cg.creator.identifierMats Söderström: 0000-0001-9946-0979
cg.creator.identifierJohn Mutua: 0000-0003-2314-3146
cg.identifier.doihttps://doi.org/10.3390/su10051610
cg.isijournalISI Journal
cg.issn2071-1050
cg.issue5
cg.journalSustainability
cg.reviewStatusPeer Review
cg.subject.ciatSOIL INFORMATION
cg.volume10
dc.contributor.authorNijbroek, Ravic P.
dc.contributor.authorPiikki, Kristin
dc.contributor.authorSöderström, Mats
dc.contributor.authorKempen, Bas
dc.contributor.authorTurner, Katrine Grace
dc.contributor.authorHengari, Simeon
dc.contributor.authorMutua, John Y.
dc.date.accessioned2018-05-21T21:10:40Zen
dc.date.available2018-05-21T21:10:40Zen
dc.identifier.urihttps://hdl.handle.net/10568/92826
dc.titleSoil Organic Carbon Baselines for Land Degradation Neutrality: Map Accuracy and Cost Tradeoffs with Respect to Complexity in Otjozondjupa, Namibiaen
dcterms.abstractRecent estimates show that one third of the world’s land and water resources are highly or moderately degraded. Global economic losses from land degradation (LD) are as high as USD $10.6 trillion annually. These trends catalyzed a call for avoiding future LD, reducing ongoing LD, and reversing past LD, which has culminated in the adoption of Sustainable Development Goal (SDG) Target 15.3 which aims to achieve global land degradation neutrality (LDN) by 2030. The political momentum and increased body of scientific literature have led to calls for a ‘new science of LDN’ and highlighted the practical challenges of implementing LDN. The aim of the present study was to derive LDN soil organic carbon (SOC) stock baseline maps by comparing different digital soil mapping (DSM) methods and sampling densities in a case study (Otjozondjupa, Namibia) and evaluate each approach with respect to complexity, cost, and map accuracy. The mean absolute error (MAE) leveled off after 100 samples were included in the DSM models resulting in a cost tradeoff for additional soil sample collection. If capacity is sufficient, the random forest DSM method out-performed other methods, but the improvement from using this more complex method compared to interpolating the soil sample data by ordinary kriging was minimal. The lessons learned while developing the Otjozondjupa LDN SOC baseline provide valuable insights for others who are responsible for developing LDN baselines elsewhere.en
dcterms.accessRightsOpen Access
dcterms.available2018-05-17
dcterms.bibliographicCitationNijbroek, Ravic, Piikki, Kristin, Söderström, Mats, Kempen, Bas, Turner, Katrine, Hengari, Simeon, Mutua, John. (2018). Soil Organic Carbon Baselines for Land Degradation Neutrality: Map Accuracy and Cost Tradeoffs with Respect to Complexity in Otjozondjupa, Namibia. Sustainability, 10(5), 1610.en
dcterms.extent1610
dcterms.issued2018
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherMDPI
dcterms.subjectsoilen
dcterms.subjectland degradationen
dcterms.subjectdegradación de tierrasen
dcterms.subjectsoil organic carbonen
dcterms.subjectsustainable development goalsen
dcterms.subjectobjetivos de desarrollo sostenibleen
dcterms.subjectnamibiaen
dcterms.typeJournal Article

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