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| Pedron,Fabrício de Araújo; Lourenzi,Cledimar Rogério; Ceretta,Carlos Aberto; Lorensi,Juliana; Cancian,Adriana. |
| ABSTRACT: Organic fertilization effect on physical-chemical properties in no-tillage systems in tropical soils has been widely investigated, but little is known about the effects of this practice on the mineralogy of the clay fraction. This study aimed to evaluate the clay-fraction mineralogy of two subtropical soils, fertilized with organic residues in long-term no-tillage systems. An Alfisol fertilized with 0, 40, and 80 m3 ha-1 yr-1 pig slurry was evaluated for eight years, and an Oxisol with 0, 8, and 16 Mg ha-1 of wood shavings with pig slurry, for six years. Soil samples from the layers 0.00-0.04, 0.04-0.08, and 0.16-0.20 m were collected and subjected to chemical extractions with DCB and oxalate, X-ray diffractometry, and thermal analysis. No... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management; Soil minerals; Pig slurry. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100413 |
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| Ferreira,Edilene Pereira; Coelho,Ricardo Marques; Valladares,Gustavo Souza; Dias,Laura Milani da Silva; Assis,Ana Carolina Cunha de; Silva,Rafael Cipriano da; Azevedo,Antonio Carlos de; Abreu,Cleide Aparecida de. |
| 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 from different parent materials (limestone, siltstone, phyllite, alluvial-colluvial sediments, detrital cover, and rhythmite) were studied in two lithotoposequences. Soil morphological, particle-size, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Parent material; Pedogenesis; Soil minerals; Trace elements. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100519 |
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