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Genesis and Classification of Nitisols from Volcano-Sedimentary Lithology in Northeastern Brazil

Edivan Uchôa Cavalcanti da Costa, Jane Kelly Silva Araujo, Laércio Vieira de Melo Wanderley Neves, José Coelho de Araújo Filho, Juliet Emília Santos de Sousa, Marcelo Metri Corrêa, [...]


ABSTRACT On the southern coast of Pernambuco State (PE), Brazil, lithotypes of the Cabo Basin (volcanic and sedimentary rocks), in association with the relief, allow the determination of the dynamics of the formation of Nitossolos Háplicos (Nitisols), including those with high levels of exchangeable aluminum. The objective of this study was to evaluate the influence of lithological diversity (basalt and sedimentary siliciclastic rocks) on the morphological, physical, chemical, and mineralogical properties of Nitossolos Háplicos along a slope (P1-summit, P2-backslope, P3-footslope) […]

Genesis and Classification of Sodic Soils in the Northern Pantanal

Jairo Calderari de Oliveira, Mariane Chiapini, Alexandre Ferreira do Nascimento, Eduardo Guimarães Couto, Raphael Moreira Beirigo, Pablo Vidal-Torrado


ABSTRACT The simultaneous occurrence of high levels of exchangeable sodium percentage (ESP) and alkalinity in soils imposes restrictions on plant development and affects physical properties such as porosity, bulk density, permeability, and hydraulic conductivity. Although sodic soils are frequent in the flood plain of the São Lourenço River, northern Pantanal, Brazil, few studies focus on their formation and classification, especially with regard to specific processes and detailed classification into lower categorical levels by the different systems available. The aim of […]

Performance of a Distributed Hydrological Model Based on Soil and Moisture Zone Maps

Lívia Alves Alvarenga, Carlos Rogério de Mello, Alberto Colombo, Luz Adriana Cuartas


ABSTRACT The scarcity of field data to develop soil maps through a pedological survey is one of the main limitations to using distributed hydrological models, especially in small and medium-sized watersheds. The aim of this study was to compare a distributed hydrological model prediction to a soil map based on a pedological survey and a moisture zone map obtained using the Height Above the Nearest Drainage – HAND model. The Distributed Hydrology Soil Vegetation Model – DHSVM, which is a […]

Pedological Heterogeneity of Soils Developed from Lithologies of the Pirambóia, Sanga-do-Cabral, and Guará Geological Formations in Southern Brazil

Pablo Grahl dos Santos, Jaime Antonio de Almeida, Letícia Sequinatto, David José Miquelluti


ABSTRACT The source material is one of the factors that most influence soil genesis and the mainly responsible for the nature, composition, and behavior of the soil. Given the geological complexity of the Santa Maria River basin, the objective of this study was to investigate whether the new lithologies described recently may be responsible for a greater variation in soil properties, as well as in the soil taxonomy itself. The study area is located in the municipality of Rosário do […]

Methods for Quantifying Shrinkage in Latossolos (Ferralsols) and Nitossolos (Nitisols) in Southern Brazil

Luana da Silva, Letícia Sequinatto, Jaime Antonio de Almeida, Diego Bortolini


ABSTRACT Brown Nitossolos (Nitisols) and Latossolos (Ferralsols), according to the Brazilian System of Soil Classification (SiBCS), have a “caráter retrátil” as their distinctive property. Because this is a new topic, it is necessary to propose methods for evaluation. The objectives of this study were to evaluate methodologies for quantifying the shrinkage of soil using the Syringe Method and the Metallic Mercury Method, and to propose a new one, the “Ring with Sand Method”. Soil samples from eight pedons were used, […]

Characterization and Classification of Soils under Forest and Pasture in an Agroextractivist Project in Eastern Amazonia

Mariana Delgado Oliveira Zenero, Laura Fernanda Simões da Silva, Selene Cristina de Pierri Castilho, Alix Vidal, Michel Grimaldi, Miguel Cooper


ABSTRACT: Knowledge of soils in the Amazon rainforest is becoming increasingly essential due to dynamics adopted by farmers that substitute forest for pastures, together with growing pressure from diverse segments of society towards adoption of sustainable production systems. The objective of this study was to characterize the soils along two toposequences, one under forest (F) and the other under pasture (P), and to verify how the change in land use influences soil attributes, evaluating their inclusion in the Brazilian Soil […]

Histosols in an Upper Montane Environment in the Itatiaia Plateau

Paula Fernanda Chaves Soares, Lúcia Helena Cunha dos Anjos, Marcos Gervasio Pereira, Luiz Carlos Ruiz Pessenda


ABSTRACT: Highland environments favor accumulation and preservation of soil organic matter (SOM) due to low temperatures, leading to the formation of Histosols. The Itatiaia National Park (INP), Rio de Janeiro, Brazil, offers conditions for preservation of SOM deposited over time, which has led to the formation of these soils. The objective of this study was to characterize Histosols in this environment, with the premise that it may provide evidence of changes in vegetation. Organossolos (Histosols) were sampled, characterized, described, and […]

Genesis and Classification of Soils Containing Carbonate on the Apodi Plateau, Brazil

Edilene Pereira Ferreira, Lúcia Helena Cunha dos Anjos, Marcos Gervasio Pereira, Gustavo Souza Valladares, Rafael Cipriano-Silva, Antônio Carlos de Azevedo


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 […]

Intermittent Pond Areas in Coastal Tablelands of the Reconcavo Region of Bahia, Brazil: Genesis of Areas, Characterization, and Soil Classification

Rivani Oliveira Ferreira, Oldair Del’Arco Vinhas Costa, Luciano da Silva Souza, Paulo Klinger Tito Jacomine


ABSTRACT Coastal Tablelands are flattened areas cut by valleys, which have predominantly Argissolos Amarelos (Yellow Argisol) and Latossolos Amarelos (Yellow Latosol). In contrast to this landscape, there are depressed circular areas, known as ponds, that create new dynamics in soil formation, due to the intermittent presence of water throughout the year. The soils of these pond areas are little known, which leads to the possibility of inappropriate use and management. The objective of this study was to describe the soils […]

Relationship between Soil Properties and Vegetation in the Ecotone Region of the Middle São Francisco River Valley, Brazil

Daniel Meira Arruda, Carlos Ernesto Gonçalves Reynaud Schaefer, Mateus Lanna Borges de Moraes


ABSTRACT The Middle São Francisco River valley is a vast territorial area with marked seasonal change and diversity of lithology, landscapes, soil, and vegetation. However, the relationships between soil characteristics and plant communities are poorly known. In this study, we show the relationships between key soil properties that determine the establishment of savanna-steppe, wooded savanna-steppe, savanna, semideciduous forest, and deciduous forest in this region through analysis of 166 soil profiles. In general, savanna soils are much more leached, Al-saturated, and […]

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