Porosity characterization of Argiudolls under different management systems in the Argentine Flat Pampa

Imhoff, Silvia; Ghiberto, Pablo Javier; Grioni, A.; Gay, J.P.

doi:10.1016/j.geoderma.2010.05.005

Cited by 48 publications

(45 citation statements)

References 40 publications

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“…Physical quality degradation in these soils exacerbates these problems as evidenced in Argiudolls and Hapludolls irrigated with sodic-bicarbonated waters and in Argiudolls when conventional tillage or no-till systems were applied without the inclusion of adequate rotations (Pilatti et al, 2006;Ghiberto et al, 2007;Imhoff et al, 2010 …”

Section: Soil Physical Quality Indicatorsmentioning

confidence: 99%

Soil physical quality of Mollisols quantified by a global index

Ghiberto

Imhoff

Libardi

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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Indicators synthesizing the state of the structural quality and the function of the porous system are useful for assessing soil production capacity as well as the way it may serve natural ecosystems. This research aimed (i) to determine indicators of the state and function of the porous system, (ii) to use them to derive a global index to characterize the soil physical quality, and iii) to establish a reference pore-size distribution curve for Mollisols from the province of Santa Fe (Argentina). Sixty water retention curves (WRC) of A and B horizons of Mollisols, with clay varying between 119 and 538 g kg . Both the high silt content and low organic matter content confer on the soil characteristics with low stability, excess of small pores and low porosity of the macropore domain. Consequently, the capacity to quickly drain the water excess and allow root proliferation was not optimal, possibly due to the high silt or clay content and the low sand content, characteristic of the soil matrix of these Mollisols.

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Section: Soil Physical Quality Indicatorsmentioning

confidence: 99%

Soil physical quality of Mollisols quantified by a global index

Ghiberto

Imhoff

Libardi

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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“…Following Watson and Luxmoore (1986, cited by Imhoff et al, 2010), the number of hydraulically effective pores between two tensions is related to the difference between hydraulic conductivity for these two tensions (K m , L T −1 ) and can be calculated thanks to Poiseuille's law and the laminar flow equation:…”

Section: Hydraulic Macroporosity Efficiencymentioning

confidence: 99%

“…The ratio between effective macroporosity and measured porosity is therefore an indicator of the hydraulic performances of the soil (Buczko et al, 2006 cited by Imhoff et al, 2010), and will be tested in our context.…”

Section: Hydraulic Macroporosity Efficiencymentioning

confidence: 99%

Coupling X-ray microtomography and macroscopic soil measurements: a method to enhance near-saturation functions?

Beckers

Plougonven

Gigot

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract. Agricultural management practices influence soil structure, but the characterization of these modifications and consequences are still not completely understood. In this study, we combine X-ray microtomography with retention and hydraulic conductivity measurements in the context of tillage simplification. First, this association is used to validate microtomography information with a quick scan method. Secondly, X-ray microtomography is used to increase our knowledge of soil structural differences. Notably, we show a good match for retention and conductivity functions between macroscopic measurements and microtomographic information. Microtomography refines the shape of the retention function, highlighting the presence of a secondary pore system in our soils. Analysis of structural parameters for these pores appears to be of interest and offers additional clues for soil structure differentiation, through -among others -connectivity and tortuosity parameters. These elements make microtomography a highly competitive instrument for routine soil characterization.

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“…Contour maps confirm the existence of spatial variability of evaluated attributes (Figure 2), defined by heterogeneity and complexity that link hydrophysical attributes, among which size, form, and continuity of pores and of soil aggregates, which in turn determine the size and roots development (Imhoff et al, 2010). In sequence, contour maps offer the possibility of identifying soil sectors where greater or lesser water deficit exists, as a function of the hydrodynamic parameters Bi and S 1 , with which the conditions of management of the time and water layers application can be optimized, as well as the frequency of irrigation, which can diminish production costs, at the same time as the presence of degrading processes would be diminished, especially the formation of surface run-off, when one decides to supply a uniform irrigation layer.…”

Section: Smmentioning

confidence: 65%

Spatial Analysis of Infiltration in an Oxisol of the Eastern Plains of Colombia

Orjuela-Matta

Sanabria

Camacho-Tamayo

2012

Chilean J. Agric. Res.

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Studies that involve soil attributes variability help the analysis of the behavior of hydrophysical attributes in space, to support the decision-making process within the conception of precision agriculture. The aim of the present paper was to characterize the spatial variability of the surface infiltration and its relation to some soil physical attributes. The sampling was done with a rectangular mesh of 64 points with perpendicular distances of 52 m × 45 m between sampling points. The attributes studied were bulk density, contents of sand, silt and clay, soil moisture, cumulative infiltration, basic infiltration, sorptivity, and saturated hydraulic conductivity (Ks). Data were analyzed using descriptive statistics and geostatistics, identifying the relationship between attributes, using the Pearson correlation and cluster analysis. Results suggest a behavior of parameters close to normal, attributes related to soil water movement had greater variability, with low basic infiltration (1.46 cm h -1 ) and Ks (0.80 cm h ) show limitations by compaction. Cumulative infiltration and Ks attributes did not fit to models of spatial distribution, finding ranges of 150 m for the other attributes, distance to optimize future sampling for the study of spatial variability. Pearson correlation and cluster analysis allowed establishing relationships between soil attributes; spatial relationships were corroborated in contour maps, where we observed the influence of clay and sand content in the behavior of bulk density, and the influence of these attributes in processes of water infiltration into the soil.

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Porosity characterization of Argiudolls under different management systems in the Argentine Flat Pampa

Cited by 48 publications

References 40 publications

Soil physical quality of Mollisols quantified by a global index

Soil physical quality of Mollisols quantified by a global index

Coupling X-ray microtomography and macroscopic soil measurements: a method to enhance near-saturation functions?

Spatial Analysis of Infiltration in an Oxisol of the Eastern Plains of Colombia

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