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Electrochemical attributes and availability of nutrients, toxic elements, and heavy metals in tropical soils Scientia Agricola
Fontes,Mauricio Paulo Ferreira; Alleoni,Luís Reynaldo Ferracciú.
Electrochemical properties of soils are very important for the understanding of the physico-chemical phenomena which affect soil fertility and the availability of nutrients for plants. This review highlights the electrochemical properties of tropical soils, the behavior and the availability of nutrients, toxic elements and heavy metals in the soil, especially for soils with predominant variable charge minerals. Availability of the elements is related to ionic exchange, solution speciation, and electrostatic and specific adsorptive soil properties. Empirical and surface complexation models are briefly described, and some results of their application in tropical soils are presented. A better understanding of the role of the double diffuse layer of charges...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electric charge; Adsorption; Model; Ionic exchange; Speciation.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600014
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Mineralogy, Micromorphology, and Genesis of Soils with Varying Drainage Along a Hillslope on Granitic Rocks of the Atlantic Forest Biome, Brazil Rev. Bras. Ciênc. Solo
Pacheco,Anderson Almeida; Ker,João Carlos; Schaefer,Carlos Ernesto Gonçalves Reynaud; Fontes,Mauricio Paulo Ferreira; Andrade,Felipe Vaz; Martins,Eder de Souza; Oliveira,Fábio Soares de.
ABSTRACT Although the physical environment of the Atlantic Forest realm is well known, studies on the soil-landform relationships are fundamental to improve the management of soil resources to facilitate sustainable development. The purpose of this study was to evaluate a representative topossequence on the “Mares de Morros” landscape of deeply weathered regolith on leucocratic granite rocks and demi-orange convex slopes. The soils varied along the topossequence according to drainage and were classified as Acrudox, Pseudogleysol, and Epiaquent. The clay fraction was composed by kaolinite, in association with gibbsite, goethite, hematite, and traces of vermiculite and hydroxy-Al interlayered vermiculite (HIV). The kaolinite crystallinity index obtained by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Kaolinite crystallinity; Pseudogleysol; “Mares de Morros” landscape; Thermal analysis.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100308
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