Observing Soil-Tool Interactions and Soil Organisms Using X-Ray Computer Tomography

Tollner, E. W.; Verma, B. P.; Cheshire, J. M.

doi:10.13031/2013.30611

Cited by 28 publications

(19 citation statements)

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“…Soil chamber studies on cone penetration in soils were also employed for establishing empirical correlations between cone penetration and soil strength properties [14] and studying the mechanics of soils during cone penetration [6,9,18,19]. Johnson [19] work the mechanics of cone penetration in granular materials was explained using statistical micromechanical theory.…”

Section: Introductionmentioning

confidence: 99%

Non-linear finite element analysis of cone penetration in layered sandy loam soil – Considering precompression stress state

Tekeste

Tollner

Raper

et al. 2009

Journal of Terramechanics

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Section: Introductionmentioning

confidence: 99%

Non-linear finite element analysis of cone penetration in layered sandy loam soil – Considering precompression stress state

Tekeste

Tollner

Raper

et al. 2009

Journal of Terramechanics

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“…The earliest implementations of X-ray CT for plant research date back to 30 years ago [1]. Since X-ray CT scanners were originally designed for medical applications (and then for industrial applications), some adjustments to the image preprocessing and segmentation to accommodate root structures have been necessary.…”

Section: Introductionmentioning

confidence: 99%

Existing and Potential Statistical and Computational Approaches for the Analysis of 3D CT Images of Plant Roots

Valdes

Clarke

2018

Agronomy

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Abstract:Scanning technologies based on X-ray Computed Tomography (CT) have been widely used in many scientific fields including medicine, nanosciences and materials research. Considerable progress in recent years has been made in agronomic and plant science research thanks to X-ray CT technology. X-ray CT image-based phenotyping methods enable high-throughput and non-destructive measuring and inference of root systems, which makes downstream studies of complex mechanisms of plants during growth feasible. An impressive amount of plant CT scanning data has been collected, but how to analyze these data efficiently and accurately remains a challenge. We review statistical and computational approaches that have been or may be effective for the analysis of 3D CT images of plant roots. We describe and comment on different approaches to aspects of the analysis of plant roots based on images, namely, (1) root segmentation, i.e., the isolation of root from non-root matter; (2) root-system reconstruction; and (3) extraction of higher-level phenotypes. As many of these approaches are novel and have yet to be applied to this context, we limit ourselves to brief descriptions of the methodologies. With the rapid development and growing use of X-ray CT scanning technologies to generate large volumes of data relevant to root structure, it is timely to review existing and potential quantitative and computational approaches to the analysis of such data. Summaries of several computational tools are included in the Appendix.

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“…Soil was lifted higher as speed increased. Tollner et al ( 1986 ) used X-ray techniques to study soil displacement by a tool. Dowell et al (1988) studied field-cultivator speed and sweep spacing effects on herbicide incorporation.…”

Section: Introductionmentioning

confidence: 99%

Methods for measuring soil velocities caused by a sweep

Hanna

Marley

Erbach

et al. 1994

Soil and Tillage Research

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A field experiment was conducted to measure surface soil velocity and to determine the relation between soil aggregate velocities at the tool surface and at the soil surface.A technique incorporating use of both a video camcorder and wood blocks was developed to measure surface soil velocity. Soil velocity direction at the tool surface was measured from scratch marks on the tool. Velocity measurements were made for three sweeps with different rake angles operated at three speeds and two depths.Surface soil moved in either of two modes: V-flow (upward and laterally in the shape of one leg of the letter V) or snowplow (initially moving upward and subsequently being buried in a wave of soil). Surface soil velocities were uncorrelated with velocities on the tool surface, indicating that soil flow paths over the sweep were not parallel. The ratio of vertical to lateral soil flow at the tool surface increased with larger rake angle and was greater than the ratio at the soil surface. At the soil surface, vertical velocity was greater near the nose than near the wing tip and velocity parallel to the travel direction increased with increased speed and rake angle. AbstractA field experiment was conducted to measure surface soil velocity and to determine the relation between soil aggregate velocities at the tool surface and at the soil surface.A technique incorporating use of both a video camcorder and wood blocks was developed to measure surface soil velocity. Soil velocity direction at the tool surface was measured from scratch marks on the tool. Velocity measurements were made for three sweeps with different rake angles operated at three speeds and two depths.Surface soil moved in either of two modes: V-flow (upward and laterally in the shape of one leg of the letter V) or snowplow (initially moving upward and subsequently being buried in a wave of soil). Surface soil velocities were uncorrelated with velocities on the tool surface, indicating that soil flow paths over the sweep were not parallel. The ratio of vertical to lateral soil flow at the tool surface increased with larger rake angle and was greater than the ratio at the soil surface. At the soil surface, vertical velocity was greater near the nose than near the wing tip and velocity parallel to the travel direction increased with increased speed and rake angle.

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Observing Soil-Tool Interactions and Soil Organisms Using X-Ray Computer Tomography

Cited by 28 publications

References 0 publications

Non-linear finite element analysis of cone penetration in layered sandy loam soil – Considering precompression stress state

Non-linear finite element analysis of cone penetration in layered sandy loam soil – Considering precompression stress state

Existing and Potential Statistical and Computational Approaches for the Analysis of 3D CT Images of Plant Roots

Methods for measuring soil velocities caused by a sweep

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