Elasto-Plastic Behaviour of Soil Aggregates and the Soil Matrix as a Function of Physical Properties in three Soils of Central Chile
Author
dc.contributor.author
Fuentes, Ignacio
Author
dc.contributor.author
Seguel Seguel, Óscar Rodrigo
Author
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Casanova Pinto, Manuel Antonio
Admission date
dc.date.accessioned
2021-10-14T19:19:14Z
Available date
dc.date.available
2021-10-14T19:19:14Z
Publication date
dc.date.issued
2013
Cita de ítem
dc.identifier.citation
Krümmelbein, J., Horn, R. , Pagliai, M.(eds.) Soil degradation. Advances in Geoecology 42. Catena Verlag, 2013. ISBN: 978-3-923381-59-3
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Identifier
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https://repositorio.uchile.cl/handle/2250/182279
Abstract
dc.description.abstract
This study assessed the elasto-plastic behaviour of soil aggregates and of the soil
matrix in three soils of central Chile in terms of their structural development,
clay content and internal tension. Soil samples (cores and aggregates) were
collected from 2 Mollisols and 1 Vertisol at untilled and conventionally tilled
sites. Unconfined consolidation tests were conducted on soil cores and on
aggregates equilibrated to field capacity and air-dried, in order to determine
bearing capacity and tensile strength.
For the air-dried samples there was a positive and direct relationship between
soil mechanical properties (tensile strength and bearing capacity) and clay
content, particularly in untilled soil, because of the non-degraded structure,
while at -33 kPa the relationship was reverse, at least for the aggregates. Under
wet conditions, soil management became more important and under no tillage
we detected higher soil stability, irrespective of organic matter content. In both
wet and dry conditions, preloading affected the resistance of the samples to
deformation. Overall, the elasto-plastic behaviour of soil aggregates was
significantly different from that of the soil matrix and the differences increased
with increasing degree of soil structural development.
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Lenguage
dc.language.iso
en
es_ES
Publisher
dc.publisher
Catena Verlag
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Type of license
dc.rights
Attribution-NonCommercial-NoDerivs 3.0 United States