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Ciência e Agrotecnologia

versão impressa ISSN 1413-7054versão On-line ISSN 1981-1829


LACERDA, Marilusa Pinto Coelho et al. Preliminary mapping of alfisols and ultisols in the region of Lavras, MG. Ciênc. agrotec. [online]. 2009, vol.33, n.3, pp.788-795. ISSN 1413-7054.

Studies of characterization of soils and establishment of relationships among pedology, geology and geomorphology allow the elaboration of models of soil distribution in landscaping. This study aimed at studies of this nature, with the purpose of representing the distribution of soils with argillic horizons in the landscape of Lavras region, MG, through the generation of preliminary soil map, using geoprocessing techniques. The studies were accomplished on Alfisols and Ultisols, once these soils present characteristics related to the variation of the geochemistry composition of the igneous rocks of origin, reflecting on several attributes of the soils, emphasizing the color and the content of Fe2O3. Field trips were accomplished with morphological, physical and chemical evaluation of profiles of representative soils, developed from geological units of different geochemical compositions, establishing the pedogeologic relationships and also verifying the distribution of the soils in the landscape, with the establishment of the pedogeomorphologic relationships. It was observed that such soils are developed in the area of relief characterized by slopes from 12% to 45%, originating different soils classes with argillic horizons, directly related to the variation of the parent material. The criteria established in the relationships among pedology, geology and geomorphology allowed evaluating the distribution of the soils in the studied landscape, and the generation of a preliminary soil map, with individualization of soils with argillic horizons.

Palavras-chave : Pedogeomorphology; Pedogeology; Pedogenesis; Geoprocessing; GIS.

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