INVESTIGADORES
ROSTAGNO Cesar Mario
congresos y reuniones científicas
Título:
PEDOGENESIS Y CARTOGRAFÍA DE SUELOS COMO HERRAMIENTAS PARA EVALUAR Y MONITOREAR DEGRADACIÓN DE TIERRAS
Autor/es:
CESAR M. ROSTAGNO; PABLO BOUZA
Lugar:
Tucumán
Reunión:
Congreso; XX Congreso Geológico Argentino Simposio PEDOGENESIS Y CARTOGRAFÍA DE SUELOS COMO HERRAMIENTAS PARA LA PLANIFICACIÓN SUSTENTABLE.; 2017
Institución organizadora:
Asociación Geológica Argentina
Resumen:
Soil mapping is one of the requirements to achieve a better land use planning and sustainable use of its resources. The knowledge of soil genesis and their properties allows, in turn, a better interpretation of the processes of land degradation and changes in vegetation, necessary inputs to achieve a sustainable management of natural resources. In this presentation we describe the land systems of the Sierras de Telsen, characterize their soils and assess the erosion processes. Extensive livestock farming is the main economic activity developed in the study area, sustained by the use of natural vegetation. In each unit, dominant soils and vegetation were described and soil erosion and vegetation changes were evaluated visually and represented by a model of states and transitions. Water erosion affected mainly the highlands and wetlands, located in the bottoms of canyons, where the formation of gullies modified the soil moisture regime. In the hilly area, Lithic Torriorthent dominate, while in the wetlands the dominant soils are Typic Haploxerolls. Erosion modified the edaphic cover of the mountain ranges where the cover of bare rocks increased. In the wetland areas, sediment deposits from the upper parts of the basins covered the original Typic Haplloxerolls and gave rise to Typic Torriorthents. In piedmont areas, dominated by sandy textured Typic Torripsamments soils, wind erosion dominates and the main changes are associated with the formation of large mounds associated to shrubs. In this presentation, erosion and accumulation processes are discussed within the framework of the soil evolution model, which includes progressive and regressive processes and changes in vegetation through the state and transitional models.
