Data/hora: 03/06/2024 16:33:13

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 04/05/1999
Data da última atualização: | 04/05/1999
Autoria: | MADEIRA NETTO, J. da S.; POUGET, M.; BEDIDI, A.; CERVELLE, B.
Título: | Informacoes quantitativas sobre a mineralogia dos latosolos a partir da reflectancia espectral no visivel e infravermelho proximo e medio (400 a 2500 nm).
Ano de publicação: | 1993
Fonte/Imprenta: | In: SIMPOSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 7., 1993, Curitiba, PR. Anais. Sao Jose dos Campos: INPE, 1993.
Volume: | v.3.
Páginas: | p.249-255.
Idioma: | Português
Conteúdo: | Mineralogical and diffuse reflectance data from 56 soil samples were used to study relationships between spectral parameters and iron oxides (haematite and goethite), kaolinite and gibbsite contents in latosols. A colour index calculated from the Helmholtz coordinates, (dominant wavelength, saturation, and lightness) was found to be as good estimator ofr haematite contents as the IR(ICE), determined elsewhere. A good correlation was found between the dominant wavelength and the haematie/(haematite+goethite) ratio. The intensities of absorptions of kaolinite and gibbsite measured in their bands at 2205 nm and 2265 nm were also in good correlation with the concentrations of those mineral brought to the clay content of the samples. Finally, an index based on kaolinite and gibbsite intensities of absorption, was found to be a accurate estimator of the Ki value (SiO2/Al203 ratio).
Palavras-Chave: | Refletancia.
Thesagro: | Cerrado; Latossolo; Mineralogia; Solo.
Thesaurus Nal: | Ferralsols; mineralogy; reflectance; soil.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (2354-1) - UPC - PL - -- - CRI4805 -  - CRI4805 - DIS