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| Brilhante,Stephany Alves; Santos,Jean Cheyson Barros dos; Souza Júnior,Valdomiro Severino de; Araújo,Jane Kelly Silva; Ribeiro Filho,Mateus Rosas; Corrêa,Marcelo Metri. |
| ABSTRACT Weathering and pedogenesis have been studied for a wide range of rocks and climates around the world. However, the eruption of rhyolitic magmas is a rare geological event, which leads to few studies associated with the rhyolite-soil-landscape relationship. In this context, this study evaluated the influence of rhyolite weathering on the properties of soils along a slope in an Atlantic Forest environment in the state of Pernambuco, northeastern Brazil. Four weathering profiles derived from rhyolites were classified and sampled for chemical, physical, mineralogical, micromorphological, differential thermal, and thermogravimetric analyses. The chemical properties reflect the original rock rich in felsic minerals, poor in bases, and the types of clay... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pedogenesis; Halloysite; Toposequence; Acid crystalline rock. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100312 |
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| Juhász,Carlos Eduardo Pinto; Cooper,Miguel; Cursi,Patrícia Ribeiro; Ketzer,André Oppitz; Toma,Raul Shiso. |
| The limiting factors of the Brazilian savanna physical environment have been largely discussed. Soil morphology is fundamental to understand the behavior of soil water flow, soil physical properties and soil-landscape relationships. The aim of this study is to relate soil micro and macromorphologic attributes to soil water retention on a toposequence under native savanna woodland (cerradão) in a permanent plot of 320 m <FONT FACE=Symbol>´</FONT> 320 m installed in Assis, SP, Brazil. Samples collected at five points within the toposequence were used to determine the soil macroporosity by means of image analyses, estimated total porosity, chemical analysis, particle size distribution analysis and soil water retention. From the summit down to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian savanna; Soil porosity; Soil water flow; Soil physical quality; Toposequence. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400005 |
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| Nanthita Deeyai; Somchai Anusontpornperm; Irb Kheoruenromne; Wanphen Wiriyakitnateekul. |
| Characteristics of soils along footslope of limestone mountain were studied in farmer field used for growing sugarcane in Wangdong subdistrict, Muang district, Kanchanaburi province. There were eight locations selected, comprising lower footslope (ND-1), upper lower footslope (ND-2), lower middle footslope (ND-3), middle footslope (ND-4),upper middle footslope (ND-5), erosional lower upper footslope (ND-6), lower upper footslope (ND-7), and upper footslope (ND-8). This study aimed at investigating the relationship of soil characteristics and their position on footslope. Soil morphological, physical and chemical properties were examined and analyzed based on standard methods. All soils studied were classified as Aquic Haplustalf (ND-6), Inceptic Haplustalf... |
| Tipo: Collection |
Palavras-chave: Toposequence; Soil characteristics; Calcareous soil; อ้อย; สมบัติทางเคมีและกายภาพของดิน; ดินเนื้อปูน; ลำดับภูมิประเทศ; แปลงปลูกอ้อย; จ.กาญจนบุรี. |
| Ano: 2012 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5284 |
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