| Texto completo | |
| Autor(es): |
Pires, Luiz F.
;
Macedo, Jose R. de
;
Souza, Manoel D. de
;
Bacchi, Osny O. S.
;
Reichardt, Klaus
[5]
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Applied Radiation and Isotopes; v. 57, n. 3, p. 375-380, 2002. |
| Área do conhecimento: | Ciências Agrárias - Engenharia Agrícola |
| Assunto(s): | Mecânica dos solos Compactação dos solos Tomografia computadorizada de emissão Raios gama |
| Resumo | |
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. (AU) | |
| Processo FAPESP: | 00/09048-6 - Propriedades físicas e balanço hídrico em solo tratado com lodo de esgoto |
| Beneficiário: | Klaus Reichardt |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 00/05732-0 - Atenuação de raios gama como técnica auxiliar para a determinação da curva de retenção da água no solo |
| Beneficiário: | Luiz Fernando Pires |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |