Spatial distribution of the parent materials, color, clay-eluviated horizon thickness, textural profile type, presence and position of the ferruginous nodules and ferricretes in the profile are analyzed at a small scale using the thematic
information content of the published 1:200,000 soil map of Benin. Regional differences in the soil cover are clearly revealed. Soil provinces roughly correspond to the known geomorphologic units of Benin.
In this paper the geochemical processes underlying the formation of ferruginous, residual laterites sensu stricto are compared with the specific processes controlling the formation of highly aluminous varieties, i.e. bauxites. The laterite sensu
Spatial distribution of bowal and differences in physicochemical characteristics between bowal and woodland soils in Benin, West Africa
Benin ; Comparative study ; Ferricrust ; Forest soil ; Geochemistry ; Rainfall regime ; Soil erosion ; Soil properties ; Spatial distribution ; Tropical zone
directly related to ferruginoussoils and rainfall regime. Bowé soils are characterized by significantly lower values of electrical conductivity, organic matter, extractable phosphorus, silt and total nitrogen than woodland soils, while potassium
exchangeability of bowé soils is higher. Bowé can be expected wherever ferruginoussoils and/or ferricretes are observed under unimodal rainfall regimes condition. The disaggregation of bowé ferricretes may improve the soil physicochemical characteristics
Bowal, is degraded land surface characterized by ferricrete exposure due to soil surface erosion. Mann–Whitney test was applied to analyze the different physicochemical characteristics of bowé and nearby woodland. The results show that bowé were
Soil production in heath and forest, Blue Mountains, Australia : influence of lithology and palaeoclimate
Australia ; Climatic variation ; Forest ; Heath ; Isotope analysis ; Lateglacial ; Lithology ; New South Wales ; Palaeoclimate ; Pedogenesis ; Quaternary ; Soil erosion ; Soil properties
depth of soil. The substrate varies from hard ferruginized sandstone to soft saprolite. In situ Be 10 determinations indicate that apparent rates of erosion and soil production are greater under the relatively thin heath soil than under the thicker
Sites in the Blue Mountains show a sharp decrease of soil depth where vegetation changes from forested plateau surfaces to heath-covered spurs, and bands of bare rock in the heath suggest that soil production depends on soil presence of a finite
forest soil but, in contrast to other studies, these sites do not show significant depth-dependence of apparent soil production.
Calabria ; Clay mineral ; Gneiss ; Italy ; Mass movement ; Micromorphology ; Mineralogy ; Mountain ; Petrography ; Soil properties ; Weathering
biotite–garnet and sillimanite gneiss (BGS-G), and medium- to coarse-grained biotite–muscovite migmatitic gneiss (M-G). The weathering processes produced phyllosilicates and Fe-oxides; neoformed clay minerals and ferruginous products replaced feldspars
The A. presents the meeting and its objective: to discuss the various concepts of soil horizons and the role that soil horizons play in soil characterization, classification and mapping. This number of Catena contains selected papers of this meeting.
Soil horizons are the results of pedological processes and classes of soil horizon descriptions are seen as fundamental to soil classification. A fuzzy-sets approach to horizon classes is suggested to deal with the intergrading and multivariate
Soil profile investigations were carried out within a national 7 km grid. The profiles were classified according to the 1974 FAO-Unesco Soil Classification System. This paper describes the regional variations in soil profile development
and the related dominant soil formation processes.
Soil materials, a layer based approach to soil description and classification
Soil horizons
Australia ; Cartography ; Concept ; Land use ; New South Wales ; Soil ; Soil classification ; Soil properties
The Soil Conservation Service of New South Wales (Australia) is mapping soil landscapes at a scale of 1:100,000 and is using a soil layer based entity, termed soil materials, as the basic entity for soil description and classification. This paper
Seasonal dynamics of soil-water pressure in a cracking clay soil
Clay ; England ; Model ; Oxfordshire ; Precipitation ; Seasonal variation ; Soil ; Soil properties ; Soil water ; United Kingdom
This paper describes the results of an investigation of changes in soil water pressure head and its relationship to the macropore network in a cracking clay soil at Brimstone Farm, Oxfordshire, UK.
Struktura pudniho fondu v CSR. (Structure of soil fund in the Czech Socialist Republic)
A survey of soil fund structure in the CSR for the height soil zones of hydromorphic soils, chernozems, brown soils, illimeric podzol soils, brown forest soils and mountain podzol soils. (MS).
A Tolnai-dombsag genetikai talajtipusai és talajlepusztulasa. (Genetic soil types and soil erosion in the Tolna Hills)
The loess covered and minutely dissected hilly region of high relief is described by various soil types (brown forest soils, chernozem brown soils, chernozems, earthy barren grounds, hydromorphous soils). Surfaces are classified according
In 1985 a plot study was started on sloping cultivated loess soils in South-Limbourg (The Netherlands) to evaluate the effects of various cropping systems of fodder maize on runoff, soil loss and crop yield under natural rainfall. In 1988
, in addition a soil micromorphological investigation was undertaken of the soil layer at and immediately below the soil surface on the experimental plots. In this paper the results of the micromorphological analysis of the processes of soil structure
degradation and crust formation are presented including the applicability of the McIntyre model of soil crust formation.
This paper focuses on the 7 major soil reference books that were published between 2000 and 2012 : Handbook of Soil Science (2000 and 2012), Encyclopedia of Soil Science (2002 and 2006), Encyclopedia of Soils in the Environment (2005), Encyclopedia
of Soil Science (2008), and Soil Science — Reference collection (2009). These soils science reference books contain 1920 articles authored by some 2000 authors. The Handbook of Soil Science covers the basic subdisciplines (physics, chemistry, biology
, pedology) most extensively whereas the encyclopedia have more applied entries/articles. Overall, these intradisciplinary reference works show that the soil science discipline is vibrant and has a rapidly expanding knowledge base.
[b1] Univ. of Wisconsin, Dep. of Soil Science, Madison, Etats-Unis