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- Araújo, Suzana Romeiro; Söderström, Mats; Eriksson, Jan; Isendahl, Christian; Stenborg, Per; Demattê, JoséA.M.
- Geoderma 2015 v.237-238 pp. 308-317
- plateaus; anthropogenic soil types; soil organic carbon; cation exchange capacity; soil map; calcium; exchangeable calcium; models; least squares; reflectance spectroscopy; soil analysis; pH; nutrients; prediction; phosphorus; Amazonia; Brazil
- ... In the Brazilian Amazon patches of anthropogenic soils known as Amazonian Dark Earths (ADEs) occur. These soils are rich in carbon (C) and plant nutrients compared to the naturally occurring strongly weathered soils. In this paper we explore the potential of visible to near infrared (vis–NIR) and mid infrared (MIR) spectroscopy as an alternative to traditional soil analysis of ADE properties for p ...
- Terra, Fabrício S.; Demattê, José A.M.; Viscarra Rossel, Raphael A.
- Geoderma 2015 v.255-256 pp. 81-93
- Fourier transform infrared spectroscopy; acidity; adsorption; aluminum; boron; calcium; clay; copper; data collection; ferric oxide; iron; magnesium; manganese; models; organic matter; pH; particle size; phosphorus; potassium; prediction; quantitative analysis; reflectance; reflectance spectroscopy; sand; silicon; soil mineralogy; soil properties; sulfuric acid; support vector machines; surveys; temperate soils; titanium dioxide; tropical soils; wet digestion method; Brazil
- ... Reflectance spectroscopy has great potential to monitor and evaluate soils at large scale; however, its effectiveness in predicting properties from tropical soils still needs to be tested since their mineralogy, organic matter levels, and charge and ion adsorption dynamics are different from temperate soils. Also, it is important to assess the most appropriate spectral range for quantification of ...