Pedological characteristics of soils in the watersheds of Oueds Nekôr and Ghiss (Central Rif; Morocco)

The objective of this work is the pedological characterization soils in watersheds Oueds Nekôr and Ghiss. Several profiles were identified sampled for Physico-chemical sedimentological analyses (color index, magnetic susceptibility, pH, granulometry, water content, organic matter, carbonates). question are roughly characterized by a soft diversified lithology, sparse vegetation cover, semi-arid Mediterranean climate. Oued watershed silty type (> 50%), not very developed relatively well-drained, become well-drained stony steep eroded areas. Soil pH varies between 7 8, reflecting low alkaline to soils. In Ghiss watershed, sandstone-limestone or marl-schist poorly differentiated slopes. gravelly, alkaline, show beginning rubefaction. Very locally on wooded flats, soil can deep well-differentiated due colluvial accumulation. dark brown eluvial A horizon rich matter (3.6%). well individualized illuvial B has strongly rubbed concretions richer (4.6%). light beige C corresponds altered marl limestone parent rock with content (1.3%) susceptibility values.