Regional variability of volcanic ash soils in south Ecuador : the relation with parent material, climate and land use

Auteurs :
BUYTAERT, W.
DECKERS, J.
WYSEURE, G.

Description :
In this high Andes region, the land use changes affect particularly the páramo. The AA. analyse the regional variability of the soils in the south Ecuadorian rio Paute basin. Data from soil profiles along north-south transects are used to determine the soil properties, and to relate the spatial variability of these properties to the major trends in parent material, volcanic ash deposits and climate. The impact of human activities on the soil properties is assessed in a case study in the Machangara valley. Data from 5 profiles, located in an area with natural grass vegetation are compared with 4 profiles in a heavily disturbed, intensively drained cultivated area. Despite the intensity of the land use, very few significant differences are found.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2007, vol. 70, n°. 2, p. 143-154, nombre de pages : 12, Collation : Illustration, Références bibliographiques : 38 ref.

Date :
2007

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena