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dc.contributor.authorGuerrero, C.
dc.contributor.authorWetterlind, J.
dc.contributor.authorStenberg, B.
dc.contributor.authorMouazen, A.
dc.contributor.authorGabarrón-Galeote, M.
dc.contributor.authorRuiz-Sinoga, J.
dc.contributor.authorZornoza, R.
dc.contributor.authorViscarra Rossel, Raphael
dc.date.accessioned2019-02-19T04:15:36Z
dc.date.available2019-02-19T04:15:36Z
dc.date.created2019-02-19T03:58:24Z
dc.date.issued2016
dc.identifier.citationGuerrero, C. and Wetterlind, J. and Stenberg, B. and Mouazen, A. and Gabarrón-Galeote, M. and Ruiz-Sinoga, J. and Zornoza, R. et al. 2016. Do we really need large spectral libraries for local scale SOC assessment with NIR spectroscopy?. Soil and Tillage Research. 155: pp. 501-509.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/74023
dc.identifier.doi10.1016/j.still.2015.07.008
dc.description.abstract

Near infrared (NIR) spectroscopy was used to predict the soil organic carbon (SOC) contents at local scale in eleven target sites. For that, eight spectral libraries of different sizes (ranging from 3482 to 36 samples) were used to construct national, provincial and local scale models. Inaccurate predictions were obtained except when the largest national library was used to construct the model. We also obtained SOC predictions once the models were adapted to target sites characteristics. For the models' adaptation, we used a two-step approach consisting on spiking (as first step) and extra-weighting (as second step). The effect of spiking was small in larger-sized models and high in smaller-sized models, whereas the effect of extra-weighting was small in smaller-sized models and large in larger-sized models. The very high accuracy obtained after models' adaptation (R2>0.95; RPIQ>5.48), regardless of the size of the spectral library, suggests that large spectral libraries are not needed for local scale SOC assessment. These results have important implications regarding the way that NIR spectroscopy can result highly effective for land management and how users can focus and organize the analytical efforts.

dc.titleDo we really need large spectral libraries for local scale SOC assessment with NIR spectroscopy?
dc.typeJournal Article
dcterms.source.volume155
dcterms.source.startPage501
dcterms.source.endPage509
dcterms.source.issn0167-1987
dcterms.source.titleSoil and Tillage Research
curtin.departmentSchool of Molecular and Life Sciences (MLS)
curtin.accessStatusFulltext not available


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