ABSTRACT Pedogenetic processes or phenomena not directly related to pedogenesis can strongly influence soil formation. This study aimed to identify the origin of the abrupt textural difference and the deep, dark horizon in a soil profile located in southern Brazil by examining pedogenetic processes and sedimentology. The research was conducted in the geomorphological province of the Coastal Plain of Rio Grande do Sul, characterized by marine and eolian sedimentary deposits from the Quaternary (Pleistocene) period, formed during alternating humid and […]

ABSTRACT Lithological and geomorphological variations determine formation of soils with different mineralogical constitutions and can influence the distribution of potentially toxic elements (PTE). The aim of this study was to determine the contents of PTE and mineralogical assemblages along soil profiles of different classes and parent materials and to investigate the association among these factors in the São Francisco sedimentary basin in the northern part of the state of Minas Gerais (Brazil). Eight soil pedons of different classes that developed […]

Solos concrecionários (Plintossolo Pétrico concrecionário) nas Regiões Central e Norte do Brasil são muito comuns, ocorrendo em áreas baixas e nas bordas das chapadas, constituindo geralmente solos distróficos,pobres em nutrientes. A ocorrência de solo concrecionário eutrófico no município de Ouro Verde de Goiás, em área de borda de chapada motivou esta pesquisa, desenvolvida com a finalidade de verificar a relação eutrofia/solo/material litológico subjacente, provável fonte das bases trocáveis. As relações pedológicas e geoquímicas do solo com as concreções e a […]