Morphological, physical, chemical and mineralogical properties, as well as the weathering processes were studied in a Red Yellow Argisol (Aridic Kandiustalf) (well drained) and a Solodic Planosol (Aridic Haplustalf) (partially drained), developed from gnaisses, in a topossequence of the central semiarid region of Ceará State, Brazil. The study had the purpose of investigating the influence of soil locations in the landscape (internal drainage) and on the diversification of soil properties, as well as to study processes of surface transport and […]

Sand, silt and clay fraction mineralogy as well as the weathering processes of two soils with excess of sodium (SPL and SS) were studied in the state of Ceará, Brazil. The sand coarse and silt were studied using polarized microscopy and phase contrast, while the fine silt and clay were analyzed by X-ray diffraction. Additional information on the mineralogical transformations that occurred in the horizons of both pedons was obtained using scanning electron microscopy. The Solodic Planosol showed in the […]