ABSTRACT Information is scarce on the genesis and classification of soils derived from calcareous rocks in the Northeastern region of Brazil. This study describes the morphological, physical, chemical, mineralogical, and micromorphological properties of four soil profiles (P1-P4) located in the Apodi Plateau. A pedogenesis hypothesis and soil classification, according to the Brazilian System of Soil Classification (SiBCS), are proposed for these profiles. The interactions between parent material, surface topography and climate affected the pedogenesis processes and soil properties, although the […]

Despite their importance and vulnerability, little is known about the soils in the calcareous karst systems in Brazil. The objective of this study was to evaluate the genesis of soils formed from calcareous parent materials and to characterize their properties, as a contribution to the Brazilian Soil Classification System (SiBCS). Three profiles located at footslope (P1), backslope (P2) and summit (P3) positions in a toposequence with slightly undulated relief, were studied in the Serra da Bodoquena, Mato Grosso do Sul […]

The soil types Neossolos Litólicos (Leptosols) and Neossolos Regolíticos (Regosols) have been poorly studied in Brazil, due to their relatively low potential for agricultural use. Consequently the morphological description of Neossolos in the field is also hampered, particularly in terms of contacts between soil, saprolite and rock, and their classification in the Brazilian Soil Classification System. The purpose of this study was: to define morphologically the contact between soil, saprolite and rock in Neossolos; generate data of the saprolite layer […]

Brazilian soil science is outstanding in tropical soil research, with a wealth of information on the soils of the country. However, this knowledge is not readily available. The aim of this study was to increase the range of a national soil profile database, based on soil surveys of wide extent. The soil taxonomy was updated based on the latest version of the Brazilian Soil Classification System. The updated database was also evaluated for coverage and potential for quantitative analyses. For […]