118 results

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 […]

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Soil characterization and drainage effects in a savanna palm swamp (vereda) of an agricultural area from Central Brazil

Ingrid Horák-Terra ORCID logo , Fabrício da Silva Terra ORCID logo , Adrieny Kerollen Alves Lopes ORCID logo , Leonardo Barros Dobbss ORCID logo , Ademir Fontana ORCID logo , Alexandre Christófaro Silva ORCID logo , [...]

21/Mar/2022

ABSTRACT Brazilian palm swamps (veredas) are fundamentals in the hydrological balance of watercourses in the Brazilian savanna (Cerrado). The “sponge effect” of their soils is the main factor controlling local hydrology, storing rainwater, and functioning as headwaters. The restricted knowledge of these tropical ecosystems has led to increased losses, poor preservation, and reduction in their ecosystem services. Veredas have become refuges surrounded by croplands, often drained and inappropriately managed. This study shows the impacts of anthropization on soil processes and […]

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Urban soils in Brazil: A review

Sheila Aparecida Correia Furquim ORCID logo , Ícaro Sena Almeida ORCID logo

14/Mar/2022

ABSTRACT This study analyzes the scientific production about soils within cities in Brazil, the most populous country of Latin America, to highlight significant patterns and contributions and point out gaps and future challenges. A more robust literature about urban soils in Brazil started in the 90´s decade and has intensified since 2015. Papers are mostly published in Portuguese, majority performed in cities with more than 500,000 inhabitants, many of them located in the Southern and Southeastern regions, and mainly focused […]

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. […]

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Teaching soil science: The impact of laboratory and field components on the knowledge and attitude toward soil

Alexander Neaman ORCID logo , Christian Stange ORCID logo , Sarah Zabel ORCID logo , Tatiana M. Minkina ORCID logo , Carolina Yáñez ORCID logo , Elliot Burnham ORCID logo , [...]

24/Nov/2021

ABSTRACT The concept of attitude toward soil is emerging, with a slim choice of scales available to collect hard data. There is also a dearth of standard scales to acquire precise data on students’ knowledge of soil. Therefore, the objectives of the present study were: (1) to devise appropriate scales to quantify theoretical soil knowledge and attitude toward soil, and (2) to quantify the effect of laboratory studies and fieldwork on students’ theoretical soil knowledge and attitude toward soil. The […]

Fine-scale soil mapping with Earth Observation data: a multiple geographic level comparison

José Lucas Safanelli ORCID logo , José Alexandre Melo Demattê ORCID logo , Natasha Valadares dos Santos ORCID logo , Jorge Tadeu Fim Rosas ORCID logo , Nélida Elizabet Quiñonez Silvero ORCID logo , Benito Roberto Bonfatti ORCID logo , [...]

24/Nov/2021

ABSTRACT Multitemporal collections of satellite images and their products have recently been explored in digital soil mapping. This study aimed to produce a bare soil image (BSI) for the São Paulo State (Brazil) to perform a pedometric analysis for different geographical levels. First, we assessed the potential of the BSI for predicting the surface (0.00-0.20 m) and subsurface (0.80-1.00 m) clay, iron oxides (Fe 2 O 3 ), aluminum (m%) and bases saturation (V%) contents at the state level, which […]

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Optimized data-driven pipeline for digital mapping of quantitative and categorical properties of soils in Colombia

Alejandro Coca-Castro ORCID logo , Joan Sebastián Gutierrez-Díaz ORCID logo , Victoria Camacho ORCID logo , Andrés Felipe López ORCID logo , Patricia Escudero ORCID logo , Pedro Karin Serrato ORCID logo , [...]

24/Nov/2021

ABSTRACT Soil maps provide a method for graphically communicating what is known about the spatial distribution of soil properties in nature. We proposed an optimized pipeline, named dino-soil toolbox, programmed in the R software for mapping quantitative and categorical properties of legacy soil data. The pipeline, composed of four main modules (data preprocessing, covariates selection, exploratory data analysis and modeling), was tested across a study area of 14,537 km 2 located between the departments of Cesar and Magdalena, Colombia. We […]

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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 […]

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Soil classes and properties explain the occurrence and fruit production of Brazil nut

Camila Santos da Silva ORCID logo , Lucielio Manoel da Silva ORCID logo , Lucia Helena de Oliveira Wadt ORCID logo , Daniela Popim Miqueloni ORCID logo , Katia Emidio da Silva ORCID logo , Marcos Gervasio Pereira ORCID logo

13/Aug/2021

ABSTRACT Soil properties and classes can influence the occurrence of plants and the production of Brazil nut fruits and may have a different distribution between sites. This study aimed to evaluate the relationship of plants’ occurrence, production of Brazil nut fruits, and spatial variability of the properties in different soil classes in two Brazil nut stand in the state of Acre, Brazil. The study was conducted in two plots in two native Brazil nut stand, Cachoeira (CP01 and CP02 – […]

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Amazonian Dark Earths in Rondônia State: Soil properties, carbon dating and classification

Rafael de Souza Cavassani ORCID logo , Lúcia Helena Cunha dos Anjos ORCID logo , Marcos Gervasio Pereira ORCID logo , Andrés Calderin Garcia ORCID logo

29/Jun/2021

ABSTRACT Throughout the Amazon region, dark-colored soils with increased fertility are identified and referred as Amazonian Dark Earths (ADE). These unique soils are characterized by an anthropic surface horizon with dark colors, presence of charcoal and artifacts, in contrast with surrounding non-ADE soils. The ADEs show extraordinary properties such as the capacity of maintaining the dark colors and high nutrient levels after years of farming, even under the highly favorable climatic conditions for oxidation of organic matter and weathering of […]

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