38 results

Saturated hydraulic conductivity and steady-state infiltration rate database for Brazilian soils

Marta Vasconcelos Ottoni ORCID logo , Wenceslau Geraldes Teixeira ORCID logo , Aline Mari Huf dos Reis ORCID logo , Letícia Guimarães Pimentel ORCID logo , Luciana Rodrigues Souza ORCID logo , Jackson Adriano Albuquerque ORCID logo , [...]

20/Jan/2025

ABSTRACT Soil saturated hydraulic conductivity (Ksat) and steady-state infiltration rate (SSIR) are essential and necessary soil properties for different geoscience applications. Values of these hydraulic properties for the Brazilian territory are difficult to access and are dispersed in research efforts carried out around the country. This study developed an easy-to-manipulate, freely accessible database of soil saturated hydraulic conductivity, comprising field and laboratory analyses, and steady-state infiltration rates for Brazilian soils. This database was named Ksat-SSIR-DB. One analysis of the Ksat-SSIR-DB […]

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Soil organic carbon sequestration under Araucaria angustifolia plantations but not under exotic tree species on a mountain range

Yuri Lopes Zinn ORCID logo , Ricardo Cardoso Fialho ORCID logo , Carlos Alberto Silva ORCID logo

19/Jun/2024

ABSTRACT Plantation forests can be efficient C sinks in biomass and soil organic carbon (SOC), but the latter depends on many factors, including climate. Tropical humid, mountain areas have cooler temperatures, slowing microbial decomposition, and thus can store considerable SOC. However, the effects of forest plantations on SOC of these montane areas are still poorly studied. Here, we aimed to assess changes in SOC, and related soil properties, after conversion of native rainforest to plantations of five tree species, with […]

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Micromorphology and Genesis of Soils from Topolitosequences in the Brazilian Central Plateau

Fernando Cartaxo Rolim Neto ORCID logo , Carlos Ernesto Gonçalves Reynaud Schaefer ORCID logo , Danilo de Lima Camêlo ORCID logo , Marcelo Metri Corrêa ORCID logo , Roberto da Boa Viagem Parahyba ORCID logo , Anildo Monteiro Caldas ORCID logo , [...]

04/Sep/2019

ABSTRACT The micromorphology of deeply weathered soils (Ferralsols/ Latossolos ) from the Central Plateau of Brazil remains little studied, and its affiliation to different parent materials, poorly known. To clarify the processes of soil formation of these acric, gibbsitic, Fe-oxide rich Ferralsols, three lithotoposequences on local ultrabasic to basic intrusive rocks were studied. The influences of mixing and pedobioturbation are evident in all soils, and Ferralsols of the Central Plateau of Brazil are polygenetic, based on the coarse mineral composition, […]

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Performance of the Groenevelt and Grant Model for Fitting Soil Water Retention Data from Brazilian Soils

Robson André Armindo ORCID logo , Quirijn de Jong van Lier ORCID logo , Maria Eliza Turek ORCID logo , Aline Mari Huf dos Reis ORCID logo , Marina Luciana Abreu de Melo ORCID logo , Maria Elisa Palma Ramos ORCID logo , [...]

17/Jul/2019

ABSTRACT The soil water retention curve (SWRC) is essential for vadose zone hydrological modeling and related applications. In 2004, Groenevelt and Grant (GRT) presented a mathematical model for describing the SWRC and reported its mathematical versatility and good fit to soils from a Dutch database. In order to evaluate the application of GRT to SWRCs of Brazilian soils, we aimed to analyze the performance of GRT for 72 soils from Brazil. Besides that, the obtained results with GRT for these […]

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Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region

Bruno Teixeira Ribeiro ORCID logo , Diogo Costa Nascimento, Nilton Curi, Luiz Roberto Guimarães Guilherme, Enio Tarso de Souza Costa, Guilherme Lopes, [...]

24/Apr/2019

ABSTRACT In the Brazilian Cerrado biome, there are wetlands locally known as “Veredas”, which are swampy plains between hills and rivers. Since the 1970’s, the Cerrado biome has been gradually converted to livestock, crop, or forestry production. Until now, very few studies were conducted to evaluate the baseline contents of trace elements in Cerrado wetland soils. Due to their position in the landscape (bottom lands), the wetlands are potentially susceptible to contamination by runoff and/or leaching from surrounding areas at […]

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Phosphorus Forms in Ultisol Submitted to Burning and Trituration of Vegetation in Eastern Amazon

Samuel Christian Cohen Farias, Mário Lopes da Silva, Maria de Lourdes Pinheiro Ruivo, Possidônio Guimarães Rodrigues, Vânia Silva de Melo, Adriane da Rocha Costa, [...]

06/Apr/2016

ABSTRACT The use of fire to prepare agricultural areas is a technique still used by small farmers in eastern Amazon. This type of management changes the dynamics of soil nutrients, especially phosphorus, which constitutes the most limiting nutrient for crop production in tropical soils. This study was carried out to evaluate changes in phosphorus forms in an Argissolo Amarelo Distrófico (Ultisol) submitted to burning and trituration of secondary forest in eastern Amazon. The evaluated systems were: slash-and-burn of vegetation; slash-and-mulch […]

Mercury Content in Soils of Southeastern Brazil Without Anthropogenic Influence and its Correlation with Soil Characteristics

Liliane Catone Soares, Lucília Alves Linhares, Fernando Barboza Egreja, Cláudia Carvalhinho Windmoller, Maria Irene Yoshida

01/May/2015

Correlation between physical and chemical characteristics of soils and their natural mercury content is important for identifying the parameters that most influence Hg retention in these soils and its distribution in different environmental compartments. The aim of this study was to quantify the Hg content of tropical soils without anthropogenic influence and correlate it with physical and chemical soil characteristics. The present study is relevant because most research focuses on contaminated soils and, in the case of tropical soils, research […]

Pedotransfer functions to predict water retention for soils of the humid tropics: a review

Yves-Dady Botula, Eric Van Ranst, Wim M. Cornelis

01/Jun/2014

Over the past three decades, pedotransfer functions (PTFs) have been widely used by soil scientists to estimate soils properties in temperate regions in response to the lack of soil data for these regions. Several authors indicated that little effort has been dedicated to the prediction of soil properties in the humid tropics, where the need for soil property information is of even greater priority. The aim of this paper is to provide an up-to-date repository of past and recently published […]

Pedotransfer functions to estimate water retention parameters of soils in northeastern Brazil

Alexandre Hugo Cezar Barros, Quirijn de Jong van Lier, Aline de Holanda Nunes Maia, Fábio Vale Scarpare

01/Apr/2013

Pedotransfer functions (PTF) were developed to estimate the parameters (α, n, θr and θs) of the van Genuchten model (1980) to describe soil water retention curves. The data came from various sources, mainly from studies conducted by universities in Northeast Brazil, by the Brazilian Agricultural Research Corporation (Embrapa) and by a corporation for the development of the São Francisco and Parnaíba river basins (Codevasf), totaling 786 retention curves, which were divided into two data sets: 85 % for the development […]

Liming criteria and critical levels of phosphorus and potassium in oxisoils under no-till system of the south-central region of Paraná state, Brazil

Renan Costa Beber Vieira, Cimélio Bayer, Sandra Mara Vieira Fontoura, Ibanor Anghinoni, Paulo Roberto Ernani, Renato Paulo de Moraes

01/Feb/2013

When conventional tillage is replaced by no-tillage (NT) changes occur in the dynamics of soil nutrients and acidity, which may influence the soil-plant relationships and consequently, the criteria for soil fertility management. This study determined the criteria for liming as well as the soil critical levels for P and K in a crop rotation of soybean, maize, wheat, barley, and white oat, widely used in the South-Central region of the State of Parana, in Southern Brazil. The study involved 13 […]

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