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

Author:
Demattê, José A.M., Dotto, André Carnieletto, Paiva, Ariane F.S., Sato, Marcus V., Dalmolin, Ricardo S.D., de Araújo, Maria do Socorro B., da Silva, Elisângela B., Nanni, Marcos R., ten Caten, Alexandre, Noronha, Norberto C., Lacerda, Marilusa P.C., de Araújo Filho, José Coelho, Rizzo, Rodnei, Bellinaso, Henrique, Francelino, Márcio R., Schaefer, Carlos E.G.R., Vicente, Luiz E., dos Santos, Uemeson J., de Sá Barretto Sampaio, Everardo V., Menezes, Rômulo S.C., de Souza, José J.L.L., Abrahão, Walter A.P., Coelho, Ricardo M., Grego, Célia R., Lani, João L., Fernandes, Antonio R., Gonçalves, Deyvison A.M., Silva, Sérgio H.G., de Menezes, Michele D., Curi, Nilton, Couto, Eduardo G., dos Anjos, Lúcia H.C., Ceddia, Marcos B., Pinheiro, Érika F.M., Grunwald, Sabine, Vasques, Gustavo M., Júnior, José Marques, da Silva, Airon J., de Vasconcelos Barreto, Marcos C., Nóbrega, Gabriel N., da Silva, Marcelo Z., de Souza, Sara F., Valladares, Gustavo S., Viana, João Herbert M., da Silva Terra, Fabricio, Terra, Ingrid Horak, Fiorio, Peterson R., da Silva, Rafael C., Frade Júnior, Elizio F., Lima, Raimundo H.C., Alba, José M.F., de Souza Junior, Valdomiro S., de Lourdes Mendonça-Santos, Maria, Ruivo, Maria de Lourdes P., Ferreira, Tiago O., Brait, Marny A., Caetano, Norton R., Bringheti, Idone, de Sousa Mendes, Wanderson, Safanelli, José L., Guimarães, Clécia C.B., Poppiel, Raul R., Barros e Souza, Arnaldo, Quesada, Carlos A., Zarate Couto, Hilton T.
Source:
Geoderma 2019
ISSN:
0016-7061
Subject:
base saturation, cation exchange capacity, clay, databases, environmental factors, environmental management, models, pH, sand, soil organic carbon, soil sampling, spectroscopy, statistical analysis, Brazil
Abstract:
The present study was developed in a joint partnership with the Brazilian Pedometric community to harmonize and evaluate spectra from 350 to 2500 nm range of Brazilian soils. The Brazilian Soil Spectral Library (BSSL) had started back in 1995, and a protocol was created to gather soil samples from different locations in Brazil. The project has reached 39,284 soil samples from 65 contributors representing 41 institutions from all 26 states of Brazil. With this soil spectral database, it was possible to estimate important soil attributes, such as clay, sand, soil organic carbon, cation exchange capacity, pH and base saturation, with variable results. There were differences between the models considering national (for all of Brazil), regional and state scales. Statistical analysis showed that 6 patterns of spectral signatures represent the Brazilian soils types and that environmental conditions explain the differences in soils spectra. This study demonstrated that soil spectroscopy along with spectral libraries is a powerful technique providing soil estimates on a large-scale. We also developed an interactive online platform showing soil samples location and their contributors. As soil spectroscopy is considered fast, simple, accurate and mainly non-polluting soil analysis, its application may be an alternative in the sustainable management of the environment.
Agid:
6460611