Show simple item record

dc.contributor.author Taboada, Miguel Angel
dc.contributor.author Lavado, Raul Silvio
dc.contributor.author Rubio, Gerardo
dc.contributor.author Cosentino, Diego
dc.date.available 2018-09-12T16:32:10Z
dc.date.issued 2001-11
dc.identifier.citation Taboada, Miguel Angel; Lavado, Raul Silvio; Rubio, Gerardo; Cosentino, Diego; Soil volumetric changes in natric soils caused by air entrapment following seasonal ponding and water table rises; Elsevier Science; Geoderma; 101; 3-4; 11-2001; 49-64
dc.identifier.issn 0016-7061
dc.identifier.uri http://hdl.handle.net/11336/59301
dc.description.abstract Soil volumetric changes have been seldom studied in seasonally ponded soils subjected to periodic water table rises. In the Flooding Pampa of Argentina the topsoils develop significant swelling and shrinkage, despite their low percentages of total and expansible clay. We tested the hypothesis that: (a) the swelling of a Natraquoll and a Natraqualf of this region is caused by the wide change in water contents during ponding-drying cycles; and (b) soil swelling is accentuated by the effect of air entrapment ahead of the advance of soil wetting fronts. The relationship between the reciprocal of bulk density (i.e. soil specific volume), ν, and water content, θ, was determined in the laboratory (clod shrinkage curves) and in the field (repeated core sampling). Soil clods behaved in accordance to their inherent soil properties, with zero and residual shrinkage (slope n = δν/δθ< 1) in both top horizons, and normal shrinkage (slope n = δν/δθ≈ 1) throughout the water content range of Bt horizons. Unlike the clods, in the field the slope, n, was as high as 1.47-1.48 in top horizons, and 1.93-1.98 in both Bt horizons, showing the occurrence of abnormal soil swelling processes. Taking into account the narrow volumetric water content range found in the field (i.e. 0.25 v/v in both Bt horizons), this rejects our first proposed hypothesis. Soil air became trapped ahead of the advance of two field wetting fronts: (a) water table rises from depth and (b) surface ponded water. As a result, pore air volume increased during soil wetting, and was as high as 0.24-0.34 v/v, and 0.35 v/v at the maximum swelling limit of top and Bt horizons, respectively. Results show that air entrapment caused the swelling or "inflation" of soils, which agrees with our second hypothesis. However, the influence of air entrapment was more pronounced than a simple accentuation of swelling in Bt horizons. Air entrapment caused the whole soil to a depth of about 0.4 m to expand.
dc.format application/pdf
dc.language.iso eng
dc.publisher Elsevier Science
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject SOIL DYNAMICS
dc.subject SWELLING SOILS
dc.subject VOLUMETRIC ANALYSIS
dc.subject WATER FLOODING
dc.subject WATER REGIMES
dc.subject WATER TABLE
dc.subject.classification Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Soil volumetric changes in natric soils caused by air entrapment following seasonal ponding and water table rises
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-08-31T13:50:03Z
dc.journal.volume 101
dc.journal.number 3-4
dc.journal.pagination 49-64
dc.journal.pais Países Bajos
dc.journal.ciudad Amsterdam
dc.description.fil Fil: Taboada, Miguel Angel. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Ingenieria Agricola y Uso de la Tierra; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil Fil: Lavado, Raul Silvio. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Ingenieria Agricola y Uso de la Tierra; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil Fil: Rubio, Gerardo. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Ingenieria Agricola y Uso de la Tierra; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil Fil: Cosentino, Diego. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Ingenieria Agricola y Uso de la Tierra; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title Geoderma
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0016706100000896
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/S0016-7061(00)00089-6
dc.conicet.fuente unificacion


Archivos asociados

Icon
Blocked Acceso no disponible

This item appears in the following Collection(s)

Show simple item record

info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)