title: Porosity distribution by computed tomography and its importance to characterize soil clod samples.
abstract: Gamma-ray computed tomography (CT) was employed to study the soil quality of clod samples used to investigate porosity (ϕ). Samples with volumes varying from 50 to 100cm(3) were collected from the soil surface. 2D CT images were obtained with millimetric resolution. Porosity distribution analyses were carried out to infer the soil clod structure. Results obtained provided a new insight on the variability of internal clod structure due to the large amount of data analyzed, information that is not provided by traditional methods used in physics applied to soil.
authors.affiliation: Laboratory of Soil Physics and Environmental Sciences, Department of Physics, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti, 4748, CEP. 84.030-900, Ponta Grossa, PR, Brazil. Electronic address: lfpires@uepg.br.
authors.forename: Luiz F
authors.initials: LF
authors.lastname: Pires
authors.affiliation: Laboratory of Soil Physics and Environmental Sciences, Department of Physics, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti, 4748, CEP. 84.030-900, Ponta Grossa, PR, Brazil.
authors.forename: André M
authors.initials: AM
authors.lastname: Brinatti
authors.affiliation: Laboratory of Soil Physics and Environmental Sciences, Department of Physics, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti, 4748, CEP. 84.030-900, Ponta Grossa, PR, Brazil.
authors.forename: Sérgio C
authors.initials: SC
authors.lastname: Saab
authors.affiliation: Laboratory of Soil Physics and Environmental Sciences, Department of Physics, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti, 4748, CEP. 84.030-900, Ponta Grossa, PR, Brazil.
authors.forename: Fabio A M
authors.initials: FA
authors.lastname: Cássaro
keywords: (241)Am; FWHM; Gamma-ray attenuation; Soil structure; Soil variability