2016
DOI: 10.1016/j.still.2015.07.008
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Do we really need large spectral libraries for local scale SOC assessment with NIR spectroscopy?

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Cited by 105 publications
(66 citation statements)
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“…A consistent number of large soil spectral libraries are available at national [30][31][32][33] and continental scale [34,35]. Moreover, a global soil spectral library was created connecting spectral libraries from all over the world [36].…”
Section: Introductionmentioning
confidence: 99%
“…A consistent number of large soil spectral libraries are available at national [30][31][32][33] and continental scale [34,35]. Moreover, a global soil spectral library was created connecting spectral libraries from all over the world [36].…”
Section: Introductionmentioning
confidence: 99%
“…Most of the earlier soil VisNIR studies deal with similar soil samples from a local environment (e.g., field scale). When large-scale soil spectral libraries are used in practice for the prediction of samples from specific "local" environments, there have been concerns that "local" variabilities are not effectively represented or captured in the "global" model, giving rise to inferior model performance (Gogé et al, 2014;Guerrero et al, 2016;Sankey et al, 2008). One practical strategy is to select from the library a subset of samples more "similar" to local samples to calibrate VisNIR models.…”
Section: A Brief Introduction Of the Us Rapid Carbon Assessment Promentioning
confidence: 99%
“…The minimum Euclidean distance between the samples was 100 m. Geographical coordinates were recorded using a handheld global position system (GPS), with a positional error of less than 10 m. All samples were obtained through air-drying, grinding and sieving procedures [19], and then further divided into two portions: One for chemical study and another for spectral measurements. in the current work in order to simultaneously consider the SOM content, spectral information, and environmental influence.…”
Section: Study Areamentioning
confidence: 99%