Image analysis and soil micromorphology applied to study physical mechanisms of soil pore development: An experiment using iron oxides and calcium carbonate

Gargiulo, Laura; Mele, Giacomo; Terribile, Fabio

doi:10.1016/j.geoderma.2013.01.008

Cited by 36 publications

(18 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These parameters were selected in order to limit absolute counting error while avoiding excessive counting time (Grove and Jerram, 2011;Ulery and Drees, 2008;Van der Plas and Tobi, 1965). This approach enabled us to detect and quantify the frequency of the features of interest in each thin section, and to determine their areal proportions (Gargiulo et al, 2013;McKeague et al, 1980;Weibel et al, 1966). As a first approximation, areal proportions were used to estimate volumetric proportions, as proposed by Anderson andBinnie (1961) andFitzPatrick (1984).…”

Section: Micromorphological Approach and Quantificationmentioning

confidence: 99%

Illuviation intensity and land use change: Quantification via micromorphological analysis

et al. 2016

View full text Add to dashboard Cite

Section: Micromorphological Approach and Quantificationmentioning

confidence: 99%

Illuviation intensity and land use change: Quantification via micromorphological analysis

et al. 2016

View full text Add to dashboard Cite

“…Gargiulo et al . (, ) applied pore image analysis and showed that the addition of an iron grit decreased the porosity of a soil with little shrinking and swelling (this compares with the non‐swelling silt in this paper), whereas in soil with considerable shrinking and swelling the porosity increased.…”

Section: Discussionmentioning

confidence: 55%

“…In contrast, Dal Ferro et al (2012a) observed no differences in MT total porosity and pore size distribution in a soil amended with organic carbon and HA from animal manure and plant residues. Gargiulo et al (2013Gargiulo et al ( , 2014 applied pore image analysis and showed that the addition of an iron grit decreased the porosity of a soil with little shrinking and swelling (this compares with the non-swelling silt in this paper), whereas in soil with considerable shrinking and swelling the porosity increased. Relations between intra-aggregate pore volumes calculated from the bulk density and amount of cementing agents are shown in Figure 2(d).…”

Section: Properties Of the Aggregatesmentioning

confidence: 56%

“…Similarly, Gargiulo et al . () identified that Fe concretions induce the formation of new pores and that Fe coatings fill and reduce the pore space. Barral et al .…”

Section: Discussionmentioning

confidence: 67%

“…The decrease in MIP porosities of Si-and Fe-amended silt might indicate that a considerable proportion of these species are located within the S0 pores. Similarly, Gargiulo et al (2013) identified that Fe concretions induce the formation of new pores and that Fe coatings fill and reduce the pore space. Barral et al (1998), however, found similar MIP porosities before and after selective extraction of Fe in soil.…”

Section: Properties Of the Aggregatesmentioning

confidence: 96%

See 2 more Smart Citations

Effect of humic acids, sesquioxides and silica on the pore system of silt aggregates measured by water vapour desorption, mercury intrusion and microtomography

Józefaciuk

Czachor

Lamorski

et al. 2015

European J Soil Science

View full text Add to dashboard Cite

Summary Most of the information on soil aggregation and porosity comes from studies of natural soil in which the effects of the different constituents that form the structure overlap. The aim of this research was to study the effects of these constituents separately on well‐characterized artificial aggregates in order to understand them better. To do this, the pore system of model silt aggregates, amended with different amounts of humic acids, iron and aluminium hydroxides or colloidal silica, was investigated at three levels of magnification with water vapour desorption (nanometre sizes), mercury intrusion (micrometre sizes) and microtomography (tens of micrometres). Humic acid and aluminium hydroxide increased aggregate porosities measured by all methods. An increase in porosity with increasing additions of each constituent was indicated only by water desorption. We did not observe any well‐defined trends in the dynamics of average pore radii. The pore surface fractal dimension determined by mercury intrusion was negatively correlated with that measured by water desorption. The pore system in granular media comprises larger voids joined by narrower necks; therefore, we attempted to relate their sizes with a novel approach that combined microtomography with mercury intrusion and extrusion data. We observed a decrease in the size of pore necks that give access to voids of the same sizes with increasing additions of all constituents. With additions of humic acid this effect was the smallest. The mercury intrusion data showed the formation of separate concretions of iron hydroxides and silica in silt aggregates.

show abstract

Seepage mechanisms and permeability differences between loess and paleosols in the critical zone of the Loess Plateau

Hou

Qian

Zhang

et al. 2021

Earth Surf Processes Landf

View full text Add to dashboard Cite

The soil in the Loess Plateau has special permeability characteristics due to the alternating distribution of loess and paleosol layers. Using an analysis of the physical properties, microstructure and thermogravimetric analysis of loess and paleosol, this paper examines strata seepage mechanisms in the loess tableland area and considers the applicability of a hydraulic conductivity empirical formula. The analysis shows that hydraulic conductivity attenuation with depth can be represented by a negative exponential model, while hydraulic conductivity values are not normally distributed. The best-fitting models of hydraulic conductivity in the horizontal (K H ) and vertical (K V ) directions are Gaussian models, and both have strong spatial correlations. This study

show abstract

Image analysis and soil micromorphology applied to study physical mechanisms of soil pore development: An experiment using iron oxides and calcium carbonate

Cited by 36 publications

References 41 publications

Illuviation intensity and land use change: Quantification via micromorphological analysis

Illuviation intensity and land use change: Quantification via micromorphological analysis

Effect of humic acids, sesquioxides and silica on the pore system of silt aggregates measured by water vapour desorption, mercury intrusion and microtomography

Seepage mechanisms and permeability differences between loess and paleosols in the critical zone of the Loess Plateau

Contact Info

Product

Resources

About