Séquence climatique des sols récents de la région septentrionale de Ténérife (Iles Canaries). 1re partie: ecologie, morphologie, caractéristiques physico-chimiques

Content Provider	Semantic Scholar
Author	Salguero, María Luisa Tejedor Caldas, Enrique Fernández Quantin, Paul
Copyright Year	1978
Abstract	The study of a toposequence on the northern slope of Tenerife, has shown a relation between the distribution of soils and the various climatic belts. This paper deals with the most recent soils derived from basaltic materials, the pedogenesis of which cari be related more surely with present climatic conditions. This sequence is restricted to three segments: Andosols in a perhumid belt, andic Brown Soils in a transitional belt, eutrophic Brown Soils in a two seasons subtropical. The first part states the morphological physical and chemical characteristics of soils. It shows their variations according to the evolution of climate: shortening of A horizon, change of texture from loamy to clayey, development of fragmenta1 structure, decrease of reaction with Fieldes and Perrott test (NaF). 252 M.L. TWEDOR SALGUERO, E. FERNANDEZ CALDAS, P. QUANTIN The second part deals with mineralogical and micromorphological characteristics. Zt shows the evolution of some amorphous or cryptocrystalline organomineral complexes (with allophane and imogolite) and allitized (with fine gibbsite) soils, to clay minerals (halloysite, interstratified M-C) soils. Then summarizing the typology of soils, we cari deduce their place in the french classification of soils and in the Soi1 Taxonomy. At last, a general conclusion emphasizes the effect of the climatic variation between two poles, one perhumid and another with two seasons ,on the evolution of pedogenesis.
Starting Page	251
Ending Page	264
Page Count	14
File Format	PDF HTM / HTML
Volume Number	16
Alternate Webpage(s)	http://horizon.documentation.ird.fr/exl-doc/pleins_textes/cahiers/PTP/18608.PDF
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article