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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Gamma-ray computed tomography to characterize soil surface sealing

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Author(s):
Pires, Luiz F. ; Macedo, Jose R. de ; Souza, Manoel D. de ; Bacchi, Osny O. S. ; Reichardt, Klaus [5]
Total Authors: 5
Document type: Journal article
Source: Applied Radiation and Isotopes; v. 57, n. 3, p. 375-380, 2002.
Field of knowledge: Agronomical Sciences - Agricultural Engineering
Abstract

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)