A study on the genesis of Humic Oxisols and its relationships with the evolution of the landscape was carried out in an area of 5,750 ha in the central segment of the South of Minas Gerais Brazil. Two morphopedological systems (SMI and SMII), representative of the regional geology and geomorphology were chosen. Pedological (chemical, physical, morphological, micromorphological) and geomorphological studies, as well as soil charcoal quantification and radiocarbon tating were performed in four profiles classified as: Humic Xantic Hapludox and […]

The objective of this study was to study the effects of soil macrofauna on physical and chemical attributes and spectral reflectance of an Oxisol, Ultisol and Vertisol in Piracicaba (SP), Brazil. Along a topossequence, the soil aggregates produced by ants (Atta sp.), termites (Cornitermes cumulans) and earthworms (Pontoscolex corethrurus), were collected and compared with the control soil without recent visible animal activity. Soil chemical analysis and granulometry were carried out. The soil spectral behavior was determined in laboratory with a […]