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The Brazilian Soil Spectral Library (BSSL): A general view, application and challenges

2019; Elsevier BV; Volume: 354; Linguagem: Inglês

10.1016/j.geoderma.2019.05.043

1872-6259

José Alexandre Melo Demattê, André Carnieletto Dotto, Ariane F.S. Paiva, Marcus Vinicius Sato, Ricardo Simão Diniz Dalmolin, Maria do Socorro Bezerra de Araújo, Elisângela B. da Silva, Marcos Rafael Nanni, Alexandre ten Caten, Norberto Cornejo Noronha, Marilusa Pinto Coelho Lacerda, José Coelho de Araújo Filho, Rodnei Rizzo, Henrique Bellinaso, Márcio Rocha Francelino, Carlos Ernesto Gonçalves Reynaud Schaefer, L. E. Vicente, Uemeson José dos Santos, Everardo Valadares de Sá Barretto Sampaio, Rômulo Simões Cézar Menezes, José João Lelis Leal de Souza, Walter Antônio Pereira Abrahão, Ricardo Marques Coelho, C. R. Grego, João Luiz Lani, Antônio Rodrigues Fernandes, Deyvison Andrey Medrado Gonçalves, Sérgio Henrique Godinho Silva, Michele Duarte de Menezes, Nilton Curi, Eduardo Guimarães Couto, Lúcia Helena Cunha dos Anjos, Marcos Bacis Ceddia, Érika Flávia Machado Pinheiro, Sabine Grunwald, Gustavo M. Vasques, José Marques Júnior, Airon J. da Silva, Marcos C. de Vasconcelos Barreto, Gabriel Nuto Nóbrega, Marcelo Z. da Silva, Sara F. de Souza, Gustavo Souza Valladares, J. H. M. Viana, Fabrício da Silva Terra, Ingrid Horák‐Terra, Peterson Ricardo Fiorio, Rafael Carlos da Silva, Elizio F. Frade Júnior, Raimundo Humberto Cavalcante Lima, J. M. Filippini Alba, Valdomiro Severino de Souza Júnior, Maria De Lourdes Mendonça Santos Brefin, Maria de Lourdes Pinheiro Ruivo, Tiago Osório Ferreira, Marny A. Brait, Norton R. Caetano, Idone Bringhenti, Wanderson de Sousa Mendes, José Lucas Safanelli, Clécia Cristina Barbosa Guimarães, Raúl Roberto Poppiel, Arnaldo Barros e Souza, Carlos A. Quesada, Hilton Thadeu Zarate do Couto,

Soil Carbon and Nitrogen Dynamics

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.