Threshold conditions for rill initiation on a vertisol, Gunnedah, N.S.W., Australia
Australie ; Erosion des sols ; Expérimentation ; Géographie physique ; New South Wales ; Précipitation ; Pédologie ; Rill ; Ruissellement ; Sol ; Technique de recherche ; Vertisol
This paper reports the use of a hand held shear vane (a technique that can easily be applied in the field) to examine the relationship between soil strength and rill initiation for a strongly aggregated vertisol.
Etude des relations entre les processus géomorphologiques des bassins fermés et la formation de vertisols en Andalousie. La lithologie de la région, le faible pouvoir érosif du système de drainage et le climat semi-aride sont des facteurs qui
favorisent l'hydromorphisme saisonnier responsable de l'évolution des matériaux originaux en vertisols.
Salt effect on hydraulic conductivity of a vertisol
Argile minéral ; Conductivité hydraulique ; Géochimie ; Géographie physique ; Salinité ; Sol ; Sol salin ; Vertisol
concentration curves, an empirical relationship relating saturated hydraulic conductivity and soil solution properties has been derived for vertisols and its field applicability established. For all practical purposes, swelling of clay seemed to be the major
factor responsible for loss of saturated hydraulic conductivity of a sodic vertisol.
On the origin of rock fragment mulches on vertisols : a case study from the Ethiopian highlands
Argile minéral ; Domaine aride ; Eau du sol ; Ethiopie ; Fente de dessication ; Propriétés du sol ; Sol ; Variation saisonnière ; Vertisol
Arid area ; Clay mineral ; Ethiopia ; Seasonal variation ; Soil ; Soil properties ; Soil water ; Vertisol
This paper presents the case of a natural rock fragment (RF) mulch whose lithology indicates that the RF are up-squeezed by the local vertisol. Based on the data from the experimental site located in the pass of Enda Maryam, Tigray, Northern
Similarities and differences of the spheroidal microstructure in vertisols from Turkey and Israel
Argile minéral ; Eau du sol ; Irrigation ; Israël ; Micromorphologie ; Microstructure ; Porosité ; Propriétés du sol ; Sol ; Turquie ; Vertisol
Clay mineral ; Irrigation ; Israel ; Micromorphology ; Microstructure ; Porosity ; Soil ; Soil properties ; Soil water ; Turkey ; Vertisol
This paper points out the similarities and differences of the microstructure in vertisols from 2 countries of the Mediterranean belt: Turkey and Israel, and also significance of the spheroidal microstructural units and possible implications
for water movement in the vertisols of the Southeastern Anatolian Irrigation Project (GAP) area.
Arcilla mineral ; Geoquímica ; Grecia ; Llanura aluvial ; Mineralogía ; Pedogénesis ; Propiedades del suelo ; Régimen hídrico ; Taxonomía ; Vertisol
Haploxererts. The properties of these Vertisols reflect the impact of climate (alternating wet–dry periods), landscape position (alluvial plain; seasonally water saturated), and parent material (clayey, smectite-dominated fluvio-lacustrine, highly calcareous
Clay mineral ; Ethiopia ; Mountain ; Pedogenesis ; Soil ; Vertical movement ; Vertisol
Les AA. analysent le phénomène du transport vertical des pierres vers la surface en relation avec les structures polygonales actives des vertisols. Au vu de la situation stratigraphique et de l'activité des vertisols dans la région d'étude, ils
Polygenetic vertisols of the Purna Valley of central India
Argile minéral ; Datation C 14 ; Holocène ; Humidité du sol ; Inde ; Mahārāshtra ; Micromorphologie ; Microstructure ; Paléo-environnement ; Propriétés du sol ; Pédogenèse ; Température ; Vertisol
C 14 dating ; Clay mineral ; Holocene ; India ; Maharashtra ; Micromorphology ; Microstructure ; Palaeo-environment ; Pedogenesis ; Soil moisture ; Soil properties ; Temperature ; Vertisol
The AA. attempt to relate the distinctly different morphological features of the vertisols in the southwestern and northeastern parts of the Purna Valley to their genesis on the basis of existing physical, chemical, mineralogical
and micromorphological data held by the Soil Resource Studies Division. The vertisols of the southwestern part of the Purna Valley are, therefore, polygenetic because they exhibit distinctly different soil properties resulting from increasing aridity in the valley during
Les vertisols des îles Canaries occidentales. Etude physico-chimique, minéralogique et micromorphologique
Atlantique ; Canarias ; Espagne ; Géographie physique ; Pédogenèse ; Sol ; Vertisol ; Zone subtropicale
where they are slowly smashed, weathering being parallel to this smashing, or already deformed glass grains are integrated with pressure into the matrix. Colluviation is very strong in these vertisols and masks the origin of the matrix in most soils
these soils| argillans are common in the top soil and the weathering zone| in the (B) horizons they are probably destroyed by swelling. In the driest zones of these islands the vertisols are invaded by calcium carbonate.
Osobennosti mineralogiceskogo sostava i mikrostroenija slityh pocv central'noj i vostocnoj castej Sudana (Minéralogie et micromorphologie des vertisols dans l'Est et le centre du Soudan)
Granulométrie ; Géographie de l'Afrique ; Précipitation ; Sol ; Soudan ; Vertisol
Les AA. livrent une étude pédologique concernant la formation du kastanozem et des sols noirs associés comme les vertisols et les calcisols. Leur objectif est d'étudier les processus d'érosion des sols dans la région d'Otjiwarongo en Namibie.
Effect of rice husk biochar and coal fly ash on some physical properties of expansive clayey soil (Vertisol)
Agropédologie ; Amendement du sol ; Chine ; Chine du Nord ; Eau du sol ; Porosité ; Propriétés du sol ; Sol ; Vertisol
Agropedology ; China ; Northern China ; Porosity ; Soil ; Soil improvement ; Soil properties ; Soil water ; Vertisol
Abono del suelo ; Agrología ; Agua del suelo ; China ; China del Norte ; Porosidad ; Propiedades del suelo ; Suelo ; Vertisol
of an expansive clayey soil (Vertisol). Results indicate that : the RHB promotes the formation of macroaggregates and resists aggregate slaking; RHB and CFA change the pore size distribution and increase larger pores of soil; RHB and CFA decrease the tensile
Conservation des sols ; Développement durable ; Erosion des sols ; Ethiopie ; Propriétés du sol ; Ravinement ; Sol ; Tigré ; Utilisation agricole du sol ; Vertisol ; Zone intertropicale
Agricultural land use ; Ethiopia ; Gully erosion ; Soil ; Soil conservation ; Soil erosion ; Soil properties ; Sustainable development ; Tropical zone ; Vertisol
Outre les problèmes de gestion typiques des vertisols, les vertisols de vallée des Hauts Plateaux du Tigré, Ethiopie, posent les problèmes de déstabilisation physique et chimique par augmentation du ravinement et de formation en surface d'une nappe
pour réduire le développement des têtes de ravins et la formation en surface des nappes de gravats comprennent la désactivation des vertisols de vallée.
This paper furnishes new evidence of geomorphological and pedological processes taking place on the terraces of the River Guadalquivir. It deals with the formation of depressions in which blackening of soils to form Vertisols accurs
Biogenic process ; Clay mineral ; Gley ; Grain size distribution ; Loess ; Missouri ; Palaeosol ; Pedogenesis ; Soil properties ; United States of America ; Vertisol
that these soils underwent significant mixing, primarily by pedoturbation, a characteristic of modern vertisols.
Africa ; Arid lands ; Eolian features ; Geochemistry ; Niger ; Pedogenesis ; Sahel ; Sedimentation ; Semi-arid area ; Vertisols
-) Vertisols having formed on aeolian very fine-grained sediments as well, already occur in the scope of the 300-mm-isohyetal line. Due to their water-retaining capacity, these soils provide the only locations at the agronomic dry margin where the cultivation
Analyse spatiale ; Chaos ; Conductivité électrique ; Cuba ; Géostatistiques ; Humidité du sol ; Propriétés du sol ; Sol ; Variation spatiale ; Vertisol
. selected horizontal and vertical electrical conductivity (ECh and ECv, respectively) and gravimetric water content from a vertisol (Typic Hapludert) under rice cropping. Each spatial transect was oriented from South to North with 1-m spacing. It was used