| 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. 59, n. 1, p. 17-25, July 2003. |
| Área do conhecimento: | Ciências Agrárias - Engenharia Agrícola |
| Assunto(s): | Mecânica dos solos Compactação dos solos Raios gama Tomografia computadorizada de emissão |
| Resumo | |
Soil compaction is one of the fundamental parameters to evaluate the environmental impact of agricultural machinery traffic on soils. Compaction causes modifications on soil physical properties such as changes in porosity and structure that are related to soil water movement and gas exchange The objective of this work was to evaluate soil surface sealing after sewage-sludge application, and the influence of agricultural machinery traffic, through computed tomography. A first generation tomograph was used having a 137Cs source and a 3 in×3 in NaI(Tl) scintillation crystal detector coupled to a photomultiplier tube. Image analysis and tomographic unit profiles could successfully be used for the detection of soil surface sealing and soil compaction due to machinery traffic associated to sewage-sludge application. (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 |