1998
DOI: 10.1046/j.1365-2389.1998.00162.x
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A casting method for the three‐dimensional analysis of the intraprism structural pores in vertisols

Abstract: The structural voids in vertisols contain easily available water for plants and their volume can be calculated from the shrinkage curve. Access by plants to that water depends also on the geometric arrangement of the pores so that the water can flow through them. We have devised a method for studying the structural porosity by casting the pores in resin. The intraprism pore space of wet soil clods is impregnated with a UV fluorescent polyester resin under vacuum. When this has set we use the swelling propertie… Show more

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Cited by 9 publications
(8 citation statements)
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“…2007), and that elements may be transferred between plants even when they are separated with a barrier impermeable to roots. In our case, separation of root systems of G. sepium and D. aristatum was verified by direct observation of the mesh interface and, according to earlier studies (Cabidoche & Guillaume 1998), horizontal soil water movement in the clayish soil may be assumed to be negligible. Thus, we may assume with high confidence that 15 N enrichment of D. aristatum occurred via CMN with the labelled G. sepium through the mesh.…”
Section: Discussionsupporting
confidence: 71%
See 1 more Smart Citation
“…2007), and that elements may be transferred between plants even when they are separated with a barrier impermeable to roots. In our case, separation of root systems of G. sepium and D. aristatum was verified by direct observation of the mesh interface and, according to earlier studies (Cabidoche & Guillaume 1998), horizontal soil water movement in the clayish soil may be assumed to be negligible. Thus, we may assume with high confidence that 15 N enrichment of D. aristatum occurred via CMN with the labelled G. sepium through the mesh.…”
Section: Discussionsupporting
confidence: 71%
“…The results suggest that during the 10 week experiment, grass absorbed up to 22% of N exuded by G. sepium . In treatment MY, no N transfer via exudation was assumed, because the tree and grass root systems were separated with the mesh, and horizontal water movement through the mesh in the very clayish soil is likely negligible (Cabidoche & Guillaume 1998).…”
Section: Resultsmentioning
confidence: 99%
“…In our study, physico-chemical fixation of NH 4 ? in soil was likely to be small, as the pots were irrigated daily, the soil was constantly humid and the clay particles remained open (Cabidoche and Guillaume 1998). Denitrification and volatilisation can be considered unimportant in the studied soil.…”
Section: Uptake Of Exudate N By Grassmentioning
confidence: 98%
“…As the soil profile dries, these cracks will extend vertically from the surface to some finite depth and often will become interconnected in the horizontal direction. As such, shrinkage cracks can be considered to demarcate individual pedons and have previously been referred to as border (Favre et al, 1997), inter‐prism (Cabidoche and Guillaume, 1998), or planar (Bouma et al, 1977) cracks. Also during shrinkage the soil surface can vertically subside, which can be considered to be an independent porosity domain that forms external to the soil matrix.…”
Section: Theorymentioning
confidence: 99%