Artículos de revistas
The Brazilian Soil Spectral Library (BSSL): A general view, application and challenges
Fecha
2019-11-15Registro en:
Geoderma, v. 354.
0016-7061
10.1016/j.geoderma.2019.05.043
2-s2.0-85070110163
Autor
Universidade de São Paulo (USP)
Federal University of Santa Maria
Universidade Federal de Pernambuco (UFPE)
State University of Maringá
Universidade Federal de Santa Catarina (UFSC)
Federal Rural University of Amazon
University of Brasília
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
CDRS/Secretary of Agriculture of São Paulo State
Federal University of Viçosa
Federal University of Rio Grande do Norte
Agronomic Institute of Campinas (IAC)
Federal Rural University of Amazônia
Federal University of Lavras
Federal University of Mato Grosso
Federal Rural University of Rio de Janeiro
University of Florida
Universidade Estadual Paulista (Unesp)
Universidade Federal de Sergipe (UFS)
Federal Fluminense University
Federal Institute of the Southeast of Minas Gerais
Federal University of Piauí
Federal University of Jequitinhonha e Mucuri Valleys
Federal University of Acre
Federal University of Amazonas
Federal Rural University of Pernambuco
Paraense Emílio Goeldi Museum
Exata Laboratory
Federal University of Rondônia
Nacional Institute for Amazonian Research
Institución
Resumen
The present study was developed in a joint partnership with the Brazilian pedometrics community to standardize and evaluate spectra within the 350–2500 nm range of Brazilian soils. The Brazilian Soil Spectral Library (BSSL) began in 1995, creating a protocol to gather soil samples from different locations in Brazil. The BSSL reached 39,284 soil samples from 65 contributors representing 41 institutions from all 26 states. Through the BSSL spectra database, it was possible to estimate important soil attributes, such as clay, sand, soil organic carbon, cation exchange capacity, pH and base saturation, resulting in differences among the multi-scale models taking Brazil (overall), regional and state scale. In general, spectral descriptive and quantitative behavior indicated important relationship with physical, chemical and mineralogical properties. Statistical analyses showed that six basic patterns of spectral signatures represent the Brazilian soils types and that environmental conditions explain the differences in spectra. This study demonstrates that spectroscopy analyses along with the establishment of soil spectral libraries are a powerful technique for providing information on a national and regional levels. We also developed an interactive online platform showing soil sample locations and their contributors. As soil spectroscopy is considered a fast, simple, accurate and nondestructive analytical procedure, its application may be integrated with wet analysis as an alternative to support the sustainable management of soils.