This profusely illustrated book gives an exhaustive account of the principal types of soils of our planet. The "progressive descent of weathering fronts" model, recognized and used by eminent international scientists is the guiding principle of choice to link the observations and to give the reader a synthetic and coherent view of the differentiati
Definitions, Concepts and Tools: Basic concepts. Methods for study of pedogenesis. Dating and tracing.Factors of Pedogenesis: Climate. Rocks. Time and age of soils. Geomorphology and surface formations. Vegetation and humus; Soil fauna and microorganisms. Man.Progressive Descent of Weathering Fronts, Other Pedogenetic Mechanisms and Spatial Organization of Soils: Vertical differentiation of soils. Mechanisms of evolution of soils. Mineralogical evolution of clays. Attempt at modelling. Organization of soils at all scales.Classifications: International WRB and US Soil Taxonomy: Historical review. World Reference Base for Soil Resources (WRB). The American classification (Soil Taxonomy).Ferralsols and Other Soils of the Hot Regions: Generalities. Typical profile and differentiation. Duration of pedogenesis. Ecology and classification; Evolution of ferrallitic environments. Land use.Vertisols: Typical profile and differentiation. Ecology and typology. Functioning. Genesis. Classification. Evolution/degradation of Vertisols. Return to the weathering-front model. Utilization of Vertisols.Calcisols and Other Soils On Carbonate-Bearing and Sulphate-Bearing Materials: Generalities. Distribution of calcareous and Ca-saturated soils. Decarbonatation phenomena; Accumulation phenomena. Typology and classification. Utilization of calcareous soils Cambisols, Luvisols and Planosols: Fundamental mechanisms of development. Development of the profiles. Typology and classification; Ecology and duration of pedogenesis. Conservation and utilization.Red Soils of the Mediterranean and Dry Tropical Zones: Soil sequences in the Rhone valley. Ecology of the red soils. Classification and typology. Utilization of the soilsAndosols: Principal features and ecology. The �amorphous materials'