Data/hora: 08/06/2024 05:02:48

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	20/09/2021	
Data da última atualização: 	20/09/2021	
Autoria: 	PIRES, L. F.; MACEDO, J. R. de; SOUZA, M. D. de; BACCHI, O. O. S.; REICHARDT, K.	
Afiliação: 	LUIZ F. PIRES, CENA; JOSE RONALDO DE MACEDO, CNPS; MANOEL DORNELAS DE SOUZA, CNPMA; OSNY O. S. BACCHI, CENA; KLAUS REICHARDT, CENA.	
Título: 	Gamma-ray computed tomography to characterize soil surface sealing.	
Ano de publicação: 	2002	
Fonte/Imprenta: 	Applied Radiation and Isotopes, v. 57, n. 3, p. 375-380, Sept. 2002.	
DOI: 	https://doi.org/10.1016/S0969-8043(02)00098-2	
Idioma: 	Inglês	
Conteúdo: 	The application of sewage sludge as a fertilizer on soils may cause compacted surface layers (surface sealing), which can promote changes on soil physical properties. The objective of this work was to study the use of gamma-ray computed tomography, as a diagnostic tool for the evaluation of this sealing process through the measurement of soil bulk density distribution of the soil surface layer of samples subjected to sewage sludge application. Tomographic images were taken with a first generation tomograph with a resolution of 1 mm. The image analysis opened the possibility to obtain soil bulk density profiles and average soil bulk densities of the surface layer and to detect the presence of soil surface sealing. The sealing crust thickness was estimated to be in the range of 2-4 mm.	
Palavras-Chave: 	Gamma-ray transmission.	
Thesagro: 	Compactação do Solo; Raio Gama; Tomografia.	
Thesaurus Nal: 	Computed tomography; Soil compaction.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (20753-1) - UPC - AP - DD -  -  -  - DIS