31 results

Gypsic soils in the Brazilian Semiarid

Artur Henrique Nascimento da Silva ORCID logo , Marilya Gabryella Sousa ORCID logo , José Coelho de Araújo Filho ORCID logo , Marcelo Metri Corrêa ORCID logo , Xose Lois Otero ORCID logo , Tiago Osório Ferreira ORCID logo , [...]

19/Mar/2025

ABSTRACT Globally, soils with gypsic horizons cover approximately 1 million km², predominantly in arid climates. The formation of pedogenic gypsum in soils has been a topic of discussion in pedological studies for some time, with gypsification representing the process responsible for secondary gypsum accumulation. Even though international classification systems acknowledge the existence of gypsic horizons, there is a paucity of documented evidence concerning their occurrence in Brazilian soils. This study aimed to identify and describe a soil with secondary gypsum […]

Visual Abstract

Genesis and transformation of basic rock-derived soils with shiny ped faces under tropical conditions

Marcos Gervasio Pereira ORCID logo , Rafael Cipriano da Silva ORCID logo , Miguel Cooper ORCID logo , Lúcia Helena Cunha dos Anjos ORCID logo , Deyvid Diego Carvalho Maranhão ORCID logo , Fábio Soares de Oliveira ORCID logo

04/Oct/2022

ABSTRACT Soil evolves in landscapes in a natural process in which soil properties are gradually transformed. However, the transformation of argic to ferralic horizons in basic rock-derived soils under tropical conditions is poorly understood. Depending on the position of the soil profiles in landscape, evidence of pedogenetic transformation between different horizons might indicate the formation and destruction of aggregates with shiny faces. This study aimed to determine pedogenetic changes in basic rock-derived profiles in a toposequence, because soils derived from […]

Visual Abstract

Soils with dark subsurface horizons in saline basins in the Brazilian Pantanal

Andressa Rosas de Menezes ORCID logo , Ademir Fontana ORCID logo , Lúcia Helena Cunha dos Anjos ORCID logo , Marcos Gervasio Pereira ORCID logo , Jolimar Antônio Schiavo ORCID logo

04/Mar/2022

ABSTRACT Soils in the Brazilian Pantanal classified as Espodossolos and registered in the literature diverge from the central concept of pedogenesis by podzolization, especially due to the high values of pH and basic cations, although the morphology is similar to that of spodic horizons. In this sense, this study hypothesized that the neutral to alkaline conditions along the edges of the saline basins in the Lower Nhecolândia region do not inhibit the podzolization process nor the development of spodic soils. […]

Visual Abstract

Epi and endosaturation affecting redoximorphic features and pedogenesis in subtropical soils with high textural contrast developed from sedimentary rocks

Jaime Antonio de Almeida ORCID logo , Pablo Grahl dos Santos ORCID logo

11/Nov/2021

ABSTRACT Soils in the Depressão Central and Campanha Gaúcha in Rio Grande do Sul State, Brazil, developed from sedimentary rocks are mainly Alfisols (Luvissolos, Planossolos and Plintossolos) and Ultisols (Argissolos) with high textural contrast between A and/or E horizons and clayey B horizons. Red Ultisols dominate in well-drained areas in the summit. But many soils present redoximorphic features on the backslope and footslope, with mottled and/or nodules similar to plinthite due to the oscillating of the water table above the […]

Visual Abstract

Andic properties in soils with histic horizon “O” in the highlands of Southern Brazil

Jaime Barros dos Santos Junior ORCID logo , Jaime Antonio de Almeida ORCID logo

31/Mar/2021

ABSTRACT Soils with andic properties are characterized by a low apparent density, variable charges, large amounts of allophanes, imogolite, ferrihydrite, and/or organo-metallic complexes with Al, and present high phosphate retention. Soils derived from non-pyroclastic materials rich in silicates, formed under a cold and humid climate, a large amount of organic carbon, acid weathering, andic properties can manifest when a large amount of Al is present in the form of organo-metallic complexes. This study aimed to evaluate the characteristics and geographical […]

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Alluvial soil formation in the plains of northeastern Brazil

Rafael Cipriano-Silva ORCID logo , Gustavo Souza Valladares ORCID logo , Antônio Carlos de Azevedo ORCID logo , Lúcia Helena Cunha dos Anjos ORCID logo , Marcos Gervasio Pereira ORCID logo , Carlos Roberto Pinheiro Junior ORCID logo

23/Oct/2020

ABSTRACT Soils in alluvial plains of the lower course of the Acaraú River, Ceará State, Brazil, are weakly developed and have a complex distribution in the landscape. This study reports the pedogenic characterization of such soils in an effort to understand their formation. Soil pits were opened in four representative sites, profile morphology was described, and soil samples were collected for chemical, physical, mineralogical, and micromorphological analyses. All profiles had weak pedogenic development, as inferred from their morphological characteristics, lack […]

Visual Abstract

Genesis and micropedology of soils at Serra do Divisor and Moa river floodplain, northwestern Acre, Brazilian Amazonia

Bruno Araujo Furtado de Mendonça ORCID logo , Carlos Ernesto Gonçalves Reynaud Schaefer ORCID logo , Elpídio Inácio Fernandes-Filho ORCID logo , Felipe Nogueira Bello Simas ORCID logo , Eufran Ferreira do Amaral ORCID logo

28/Aug/2020

ABSTRACT The northwestern part of the Acre State (Brazil) possesses singular soils in Brazilian Amazonia, but have been very little studied. This study aimed to discuss the genesis and some micropedological aspects of the soils from Serra do Divisor and adjacent floodplain soils of the Moa river, to enhance the knowledge on their formation. A toposequence of soils ranging from the uppermost part of sub-Andean Serra do Divisor to the Alluvial soils of Moa river floodplain was studied, regarding chemical, […]

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Relief Position and Soil Properties under Continuous Banana Cropping in Subhumid Climate in Northeast Brazil

Maria da Conceição de Almeida ORCID logo , Jane Kelly Silva Araujo ORCID logo , Mateus Rosas Ribeiro Filho ORCID logo , Valdomiro Severino de Souza Júnior ORCID logo

20/Aug/2019

ABSTRACT Sequences of thick and eroded soils in hills surfaces are cultivated with banana since the beginning of the last century in the Northeast of Pernambuco (PE), Brazil. Measurements of soil properties depending on soil slope under intensive agricultural cultivation are limited mostly as the pedogenetic approach. This study aimed to identify the dominant soil types, to evaluate morphological, physical, chemical, and mineralogical properties of soil profiles, and link them to the relief position under continuous banana cropping, in the […]

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Paleoenvironmental Characterization of a High-Mountain Environment in the Atlantic Forest in Southeastern Brazil

Eduardo Carvalho da Silva Neto, Jaqueline Jesus Santana dos Santos, Marcos Gervasio Pereira, Deyvid Diego Carvalho Maranhão, Fabiana da Costa Barros, Lúcia Helena Cunha dos Anjos

02/Nov/2018

ABSTRACT: Records of changes in the phytosociological structure of vegetation can be observed more clearly in soils that have more significant accumulation of organic matter, like those occurring in high-mountain environments. The aim of this study was to characterize soils formed in high-mountain environments in the Itatiaia National Park (INP), state of Rio de Janeiro, southeastern Brazil, and to discuss the potential of preserved phytoliths as markers of vegetative history and environmental factors. Four profiles were selected, which were morphologically […]

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Mineralogy and Concentration of Potentially Toxic Elements in Soils of the São Francisco Sedimentary Basin

Edilene Pereira Ferreira, Ricardo Marques Coelho, Gustavo Souza Valladares, Laura Milani da Silva Dias, Ana Carolina Cunha de Assis, Rafael Cipriano da Silva, [...]

10/May/2018

ABSTRACT Lithological and geomorphological variations determine formation of soils with different mineralogical constitutions and can influence the distribution of potentially toxic elements (PTE). The aim of this study was to determine the contents of PTE and mineralogical assemblages along soil profiles of different classes and parent materials and to investigate the association among these factors in the São Francisco sedimentary basin in the northern part of the state of Minas Gerais (Brazil). Eight soil pedons of different classes that developed […]

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