Brazilian Soil Spectral Library

In Brazil, many spectroscopy research has been made ​​in recent decades. However, the first initiative effectively published and related to Soil Spectral Library is from Formaggio et al. (1996) at the level of the São Paulo state. More broadly, the work of Bellinaso et al. (2010) made ​​a library containing 4 states. Today the ESALQ  group already has data from 6 states.