Data/hora: 12/06/2024 04:20:50

Provedor de dados: 	53	
País: 	Brazil	
Título: 	Spectral behavior of some modal soil profiles from São Paulo State, Brazil	
Autores: 	Demattê,José Alexandre Melo; Terra,Fabrício da Silva; Quartaroli,Carlos Fernando.	
Data: 	2012-01-01	
Ano: 	2012	
Palavras-chave: 	Soil reflectance; Soil attributes; Soil classification.	
Resumo: 	Remote sensing has a high potential for environmental evaluation. However, a necessity exists for a better understanding of the relations between the soil attributes and spectral data. The objective of this work was to analyze the spectral behavior of some soil profiles from the region of Piracicaba, São Paulo State, using a laboratory spectroradiometer (400 to 2500 nm). The relations between the reflected electromagnetic energy and the soil physical, chemical and mineralogical attributes were analyzed, verifying the spectral variations of soil samples in depth along the profiles with their classification and discrimination. Sandy soil reflected more, presenting a spectral curve with an ascendant form, opposite to clayey soils. The 1900 nm band discriminated soil with 2:1 mineralogy from the 1:1 and oxidic soils. It was possible to detect the presence of kaolinite, gibbsite, hematite and goethite in the soils through the descriptive aspects of curves, absorption features and reflectance intensity. A relation exists between the weathering stage and spectral data. The evaluation of the superficial and subsuperficial horizon samples allowed characterizing and discriminating the analytical variability of the profile, helping to soil distinguishing and classification.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000300015	
Editor: 	Instituto Agronômico de Campinas	
Relação: 	10.1590/S0006-87052012005000038	
Formato: 	text/html	
Fonte: 	Bragantia  v.71 n.3 2012	
Fonte: 	info:eu-repo/semantics/openAccess