Application of x-ray computed tomography in the evaluation of soil porosity in soil management systems

Beraldo, José Marcos Garrido; Scannavino, Francisco de Assis; Cruvinel, P. E.

doi:10.1590/s0100-69162014000600012

Cited by 12 publications

(6 citation statements)

References 16 publications

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“…Previous studies on evaluating the influence of tillage systems at the µm scale in 3D in tropical soils are still scarce. In Brazil, one of the largest food and agricultural producers of the world, previous studies have characterized the soil porous system at µm to measure the porosity and pore size distribution of Brazilian Oxisols (Vaz et al, 2011), assessed the effect of tillage systems on the percentage of macropores (Beraldo et al, 2014) and explored the spatial and morphological configuration of the pore space of Oxisols under CT (Carducci et al, 2017(Carducci et al, , 2014. Other studies have determined the influence of ZT on the pore size and shape distribution of macropores (Passoni et al, 2015), tested the capacity of soil recovering under different management strategies (Marchini et al, 2015) and measured the impact of ZT and CT on the pore size and shape distribution and water retention (Pires et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

3D analysis of the soil porous architecture under long term contrasting management systems by X-ray computed tomography

Pires

Roque

Rosa³

et al. 2019

Soil and Tillage Research

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The development of adequate soil structure is important for achieving good physical status, which influences the sustainability of agricultural areas. Different management systems lead to the development of a wide range of soil pore network characteristics.The objective of this research was to analyze the effect of three contrasting tillage systems (zero-tillage, ZT; reduced tillage, RT; conventional tillage, CT) in the soil porous system of an Oxisol. Samples were collected from the surface layer (0-10 cm).An area under secondary forest (F) was also assessed to provide an undisturbed reference. X-ray Computed Tomography (µCT) scanning of undisturbed soil samples and image analysis were employed for analysis of the pore network. The soil under ZT

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Section: Introductionmentioning

confidence: 99%

3D analysis of the soil porous architecture under long term contrasting management systems by X-ray computed tomography

Pires

Roque

Rosa³

et al. 2019

Soil and Tillage Research

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“…Passoni et al (2014) characterized the soil macroporosity of a Rhodic Ferralsol using a second-generation X-ray microtomograph. In addition, Beraldo et al (2014) used microtomography to quantify the porosity in areas with no tillage practices, conventional tillage practices and native forest. Recently, Marchini et al (2015) applied CT to study recovering Brazilian Oxisols from the soil at 8.6 m deep, which has been exposed since the sixties, under different types of management strategies.…”

Section: Introductionmentioning

confidence: 99%

Quantifying physical and structural soil properties using X-ray microtomography

2018

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One of the current challenges in the study of recovering soil architecture is physically evaluating the internal soil structure in unconventional ways. The elaboration of consistent methods and physical parameters has become necessary for soil structural analysis. The aim of this study is to analyze the soil structures of two groups of recovering tropical soils and to simulate three-dimensional water movement pathways using unconventional methods and physical soil parameters. The following results were obtained from the analysis: 1) the S index was used as an indicator to effectively quantify the degree of management; 2) Qualisolo software was used to obtain the soil water retention curve (SWRC) of each management type; 3) the degree of anisotropy of the solid structure reflected the soil network; 4) the Euler-Poincaré number reflected the connectivity of the soil pores for each management type; 5) the Shannon entropy indicated the degree of randomness of the soil; and 6) the results of the Arya and Paris model and the simulations of water movement pathways are similar. In conclusion, the obtained results reflect the internal soil structures and their corresponding characteristics. Thus, the results can be used to predict the influence of soil architecture on the movement of water in the soil.

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“…This range of resolution is sufficient to detect macropores, mesopores and some micropores (Table 3). Clearly, this spatial resolution is ideal for studying macropores, as verified by the evaluation of porosity under three systems of management by Beraldo et al (2014). This procedure highlights that, in this case, a comparison of the effective porosity percentages obtained with two different methods of analysis for each of the different management systems is possible on a micrometric scale.…”

Section: Humification Indexmentioning

confidence: 83%

“…Vaz et al (2011) quantified the porosity and the pore size distribution of two Brazilian Oxisols, resulting in important information for establishing appropriate scanning parameters for these soils. Beraldo et al (2014) also applied a tomographic method to evaluate the porosity of three soil management systems and verified that their method could be used to obtain information at the macropore scale.…”

Section: Introductionmentioning

confidence: 93%

Geometric characterization of soil structure through unconventional analytical tools

Tseng

Alves

Milori

et al. 2018

Soil and Tillage Research

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Soil structure is essential for soil function and environmental quality. Therefore, adequate evaluation of management systems is essential to ensure the preservation and regeneration of soil structure. Techniques such as Xray microtomography and automated soil particle size analysis based on gamma-ray attenuation provide rapid quantification of soil physical properties and allow for the evaluation of soil structure. The aim of this study is to determine soil physical parameters using unconventional analytical tools to characterize and evaluate the geometric characteristics of soils with different structures at high accuracy. Soil samples extracted from the UNESP experimental farm (Brazil) were separated into two different management groups according to their textural similarity. The following results were obtained from the analysis: 1) Microtomography can be used to extract soil porosity, including soil microporosity. 2) The shape factor indicates the geometric organization of the soil structure, which is relevant and valid for evaluating the degree of soil degradation. 3) The fractal dimension is related to the soil particle and aggregate size distribution but was not sufficient for describing the soil geometric properties when used alone. 4) Coupling the fractal dimension with the lacunarity provides an important tool for estimating the soil structure. Finally, the application of the physical parameters from the unconventional method provided new insights for understanding soil geometric structure, which can support future investigations of flow phenomena in the soil.

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Application of x-ray computed tomography in the evaluation of soil porosity in soil management systems

Cited by 12 publications

References 16 publications

3D analysis of the soil porous architecture under long term contrasting management systems by X-ray computed tomography

3D analysis of the soil porous architecture under long term contrasting management systems by X-ray computed tomography

Quantifying physical and structural soil properties using X-ray microtomography

Geometric characterization of soil structure through unconventional analytical tools

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