Among the soils in the Mato Grosso do Sul, stand out in the Pantanal biome, the Spodosols. Despite being recorded in considerable extensions, few studies aiming to characterize and classify these soils were performed. The purpose of this study was to characterize and classify soils in three areas of two physiographic types in the Taquari river basin: bay and flooded fields. Two trenches were opened in the bay area (P1 and P2) and two in the flooded field (P3 and […]

Sodium pyrophosphate is the most widely used extractant of Al bound to soil organic matter (Al-humus). However, its selectivity has been questioned, so that some authors have proposed the use of substitutional extractants. To evaluate the effectiveness of unbuffered Cu (CuCl2), La (LaCl3) and K (KCl) chlorides to extract Al-humus, soil material from 31 representative pedons of Spodosols and Quartzipsamments from sandy coastal plains of São Paulo State was evaluated. The results were compared with those achieved by sodium pyrophosphate. […]

This paper presents the results of morphological properties and absolute dating by luminescence and 14C of 28 pedons from Quaternary marine deposits located in three counties along the coast in São Paulo State, Brazil: Bertioga, Cananéia, and Ilha Comprida. The objective was to provide evidence to elucidate the main processes of the genesis of Spodosols. This approach, which is unusual in research concerned with Brazilian Quaternary coastal plains, resulted in the following interpretations: (a) relief, hydrologic conditions and time were […]

In restinga soils with sand-quartzous constitution the influence of the organic fraction and biological activity on soil key functions is increased, e.g., the capacity of recycling and storing nutrients. The analysis of soil attributes and edaphic fauna at sites under different vegetation cover types is important to understand the behavior of these environments. In this study, chemical, physical and microbiological soil attributes of restinga sites and their relationships with ant populations under different vegetation types in the state of Sergipe […]

Restinga is a typical vegetation on quartzitic, sandy, nutrient-poor parent materials along the Brazilian coast. Soils under restinga vegetation on the Ilha do Cardoso (SP) were studied to understand their genesis and to improve the Brazilian Soil Classification System (SiBCS). Thus, a physical, chemical and detailed morphological characterization was carried out. The results evidenced aquic, sandy, very acid soils with variable organic matter content, in which podzolization is the main pedogenic process. Sulphidric materials also occur due to the influence […]

Fragipans and Duripans are frequently found in soils developed from sediments of the Barreiras Formation, in the low coastal plateaus of northeastern Brazil. Previous studies in arid regions have attributed Duripan cohesion to the amorphous silica. However, the Duripans and Fragipans in northeastern Brazil are located in semi-arid and high annual precipitation level zones (1.500 to 2.000 mm year-1). This study, based on a detailed characterization of soils from four depressions with different sizes, aimed to propose an evolution scheme […]