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All publications of “Fabrício de Araújo Pedron”

13 results

Field Description and Identification of Diagnostic Qualifiers for Urban Soils in Brazil

Jéssica Rafaela da Costa ORCID logo , Fabrício de Araújo Pedron ORCID logo , Ricardo Simão Diniz Dalmolin ORCID logo , Ricardo Bergamo Schenato ORCID logo

14/Jun/2019

ABSTRACT Human activities often alter soils found in urban areas. These alterations affect their environmental functions and potential for use. However, soils from urban areas in Brazil have not been surveyed and identified, which can pose a technical problem for the development of the city. Considering the importance of urban environments and their soils, this study aimed to evaluate the environmental and morphological characteristics and the physical properties of urban soils in Santa Maria, Rio Grande do Sul, Brazil. The […]

Edaphic and Topographic Factors and their Relationship with Dendrometric Variation of Pinus Taeda L. in a High Altitude Subtropical Climate

Taciara Zborowski Horst, Ricardo Simão Diniz Dalmolin, Alexandre ten Caten, Jean Michel Moura-Bueno, Luciano Campos Cancian, Fabrício de Araújo Pedron, [...]

26/Nov/2018

ABSTRACT The study of the relationships between the yield potential of forest stands and the conditions offered for plant development is fundamental for the adequate management of the forest when aiming at sustainable high yields. However, these relations are not clear, especially in commercial forests, on rugged terrain where relationships between the landscape, soil, and plants are more complex. Considering this, we tested the hypothesis that the morphological aspects of the soil conditioned by topography are the main limiting factors […]

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MINERAL RESERVES OF K DETERMINED BY DIFFERENT METHODS IN SUBTROPICAL ARGISSOLOS SOILS

Estefane Chaves, Fabrício de Araújo Pedron, Vander Freitas de Melo, Ricardo Simão Diniz Dalmolin

01/Jul/2015

Integration of chemical extraction methods and X-ray diffraction can broaden understanding of K+ forms and reserves in soil fractions, and their potential release to plants. The aim of this study was to use chemical extraction methods to estimate mineral reserves of K+ in sand, silt, and clay from subtropical soils; to associate extraction mechanisms with the forms of K+ released; and to monitor the dynamic of K+ release in a kinetics study. The sand, silt, and clay fractions of the […]

Boundary between Soil and Saprolite in Alisols in the South of Brazil

Fabrício de Araújo Pedron, Rodrigo Bomicieli de Oliveira, Ricardo Simão Diniz Dalmolin, Antonio Carlos de Azevedo and, Ricardo Vargas Kilca

01/May/2015

Despite numerous studies conducted on the lower limit of soil and its contact with saprolite layers, a great deal of work is left to standardize identification and annotation of these variables in the field. In shallow soils, the appropriately noting these limits or contacts is essential for determining their behavior and potential use. The aims of this study were to identify and define the field contact and/or transition zone between soil and saprolite in profiles of an Alisol derived from […]

Digital mapping of soil properties: particle size and soil organic matter by diffuse reflectance spectroscopy

André Carnieletto Dotto, Ricardo Simão Diniz Dalmolin, Fabrício de Araújo Pedron, Alexandre ten Caten, Luis Fernando Chimelo Ruiz

01/Dec/2014

Diffuse reflectance spectroscopy (DRS) can be used as an alternative in identifying and quantifying some soil properties such as particle size and soil organic matter (SOM). This technique may be an alternative to quantifying those properties in a large volume of soil samples since it is faster and less costly and does not produce chemical residues. The aim of this study was to develop models using multiple linear regression analysis to predict the content of clay, sand, silt, and SOM […]

Use of quantitative mineralogical variables in identifying sources of sediment in a watershed do Rio Grande do Sul

Pablo Miguel, Ricardo Simão Diniz Dalmolin, Fabrício de Araújo Pedron, Jean Michel Moura-Bueno

01/Jun/2014

The use of mineralogy as a tool for assessment of soil mineral properties is extremely important for understanding the different chemical and physical relationships in the soil. These variables/properties in the identification of sources of suspended sediments may help elucidate the factors and processes that govern the transfer of sediments and pollutants from terrestrial to aquatic systems. The aim of this study was to quantitatively characterize the mineralogy of the soil of the sources and suspended sediments in a watershed […]

Identifying sources of sediment production in a hillside catchment area

Pablo Miguel, Ricardo Simão Diniz Dalmolin, Fabrício de Araújo Pedron, Jean Michel Moura-Bueno, Tales Tiecher

01/Apr/2014

Land use outside of its agricultural suitability is the main cause of degradation of natural resources due to anthropogenic activities. Agricultural activities are among those that most disturb the environment, exposing the soil to the action of water erosion and accelerating the transfer of sediments into bodies of water. In recent years, the fingerprinting method for identifying sources of sediment has been successfully used throughout the world; however, such studies in Brazil are still incipient. This study aims to estimate […]

Origin of sandstones from the Guará formation and their pedologic cover in Rio Grande do Sul, Brazil

Edgardo Ramos Medeiros, Fabrício de Araújo Pedron, Dalvan José Reinert, Anderson Augusto Volpato Sccoti

01/Jun/2013

In the west and southwest regions of Rio Grande do Sul (RS) there are extensive areas with fragile soils developed from sandy sediments of the continental Mesozoic Paraná Basin. Inappropriate land use has accelerated the process of sandy desertification in these areas. In this case, the knowledge of soils is critical for the choice of appropriate management systems to regain sustainability. The objectives of this study were to understand the evolution and describe the relationships, in terms of origin, between […]

An appropriate data set size for digital soil mapping in Erechim, Rio Grande do Sul, Brazil

Alexandre ten Caten, Ricardo Simão Diniz Dalmolin, Fabrício de Araújo Pedron, Luis Fernando Chimelo Ruiz, Carlos Antônio da Silva

01/Apr/2013

Digital information generates the possibility of a high degree of redundancy in the data available for fitting predictive models used for Digital Soil Mapping (DSM). Among these models, the Decision Tree (DT) technique has been increasingly applied due to its capacity of dealing with large datasets. The purpose of this study was to evaluate the impact of the data volume used to generate the DT models on the quality of soil maps. An area of 889.33 km² was chosen in […]

Variation in pedological characteristics and the taxonomic classification of argissolos (ultisols and alfisols) derived from sedimentary rocks

Fabrício de Araújo Pedron, Alessandro Samuel-Rosa, Ricardo Simão Diniz Dalmolin

01/Feb/2012

There is lack of research on Argissolos (Ultisols and Alfisols) in relation to theunderstanding of the pedologic variations. Variations can be analyzed by multivariate statisticsand the data numerically classified. The comparison between the numeric classification andthe hierarchical classification can contribute to the evolution of the Brazilian Soil ClassificationSystem (SiBCS). The aims of this research were to analyze the pedologic variation of Argissolosderived from sedimentary materials in the central region of Rio Grande do Sul and to validatethe organization of the […]

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