Micromorphological indicators of pedogenesis in some tropical soils derived from basalts from Nicaragua

Eswaran, H.

doi:10.1016/0016-7061(72)90050-x

Cited by 50 publications

(9 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…cations of the parent material derived from calc-gneiss rock (Harindranath et al, 1999;Krishnan et al, 1996;Natarajan et al, 1997;Shiva Prasad et al, 1998) and limestone (Das et al, 1996). Identification of the argillic horizon in Indian Ultisols has been always difficult in the field (Bhattacharyya et al, 1994;Sen et al, 1994) and elsewhere (Beinroth, 1982;Eswaran, 1972;Rebertus and Buol, 1985). This has caused confusion on their appropriate place in the US Soil Taxonomy.…”

Section: Clay Enriched B Horizons Clay Illuviation and Taxonomic Rmentioning

confidence: 99%

Red ferruginous soils of tropical Indian environments: A review of the pedogenic processes and its implications for edaphology

Pal

Wani

Sahrawat

et al. 2014

CATENA

View full text Add to dashboard Cite

Red ferruginous (RF) soils of tropical Indian environments belong to Entisols, Inceptisols, Alfisols, Mollisols and Ultisols soil orders. The occurrence of Ultisols alongside acidic Alfisols and Mollisols in both zeolitic and nonzeolitic parent materials in humid tropical (HT) climatic environments, indicates that the soil diversity in India is large. These soils are not confined to a single production system and generally maintain a positive organic carbon (OC) balance without adding significantly to greenhouse gas emissions. This review presents a synthesis of literature on the recent developments on the pedology of RF soils, including their physical, chemical, biological, mineralogical and micro-morphological properties, and their degradation status. It also addresses the changes in soil properties in semi-arid tropical (SAT) areas, created by climate shift during the Holocene. This knowledge contributed to our understanding as to how the parent material composition influences the formation of Alfisols, Mollisols and Ultisols in weathering environments of HT climate; and also as to how the relict Alfisols of SAT areas are polygenetic. The state-of-the-art information developed through the extensive work on such soils has helped establish an organic link between pedogenetic processes and bulk soil properties, and has provided an insight of many pedological and edaphological issues related to Alfisols, Mollisols and Ultisols mainly of HT climate. The synthesis has helped us to understand as to why the formation of Oxisols from Ultisols is an improbable genetic pathway in tropical environment of India and elsewhere in the world. There is a strong need to modify the mineralogy class of highly weathered RF soils. We hope this review will help to dispel some of the myths on the formation of tropical soils and their low fertility by putting in context their characteristics and capacity to be productive.

show abstract

Section: Clay Enriched B Horizons Clay Illuviation and Taxonomic Rmentioning

confidence: 99%

Red ferruginous soils of tropical Indian environments: A review of the pedogenic processes and its implications for edaphology

Pal

Wani

Sahrawat

et al. 2014

CATENA

View full text Add to dashboard Cite

show abstract

“…Já em outro Latossolo que evoluiu em um ambiente bem drenado, a retirada dos óxidos não causou grande impacto na estabilidade dos agregados (MUGGLER et al, 1999). Em um estudo na Nicarágua, a estrutura do Latossolo foi considerada como a degradação das estrutura de Ultisols (ESWARAN, 1972). Porém, o inverso foi observado por VIDAL- TORRADO & LEPSCH (1999) estrutura do Latossolo é um re-arranjo da estrutura típica de Ultisols, na borda do planalto.…”

Section: Agregação Do Solounclassified

Partículas coloidais, dispersão e agregação em latossolos

Azevedo

Bonumá

2004

Cienc. Rural

View full text Add to dashboard Cite

RESUMO Latossolos cobrem extensas áreas no INTRODUÇÃOLatossolos são solos com alto grau de intemperismo, com fertilidade química geralmente baixa, porém com propriedades físicas muito favoráveis ao desenvolvimento de plantas e à produção agrícola. Mesmo Latossolos com muito argilosos (até 800g kg -1 ) possuem grandes taxas de infiltração de água, porosidade e aeração, e pequena densidade do solo em seu estado natural, devido à suas agregação. Agregados são os aglomerados de partículas desde o tamanho argila (iguais a ou menores que 2 micrômetros) até maiores que areia (maiores que 2000 micrômetros). Macroagregados são maiores que 250 micrômetros e microagregados os menores que este limite. Cada tipo de agregado possui uma gênese própria, refletida em seu tamanho, forma, composição e estabilidade. Nos Latossolos, os agregados possuem a forma de pequenos grânulos, bastante estáveis e resistentes. Às vezes, estes agregados são descritos como "pó-de-café", por se assemelharem em tamanho e aspecto aos grãos de café solúvel.O resultado da desagregação geralmente é a dispersão. A argila dispersa em água (ADA) é a fração da argila do solo que se dispersa espontaneamente em água e, portanto a que possui, potencialmente, maior mobilidade. O aumento da ADA está diretamente relacionado com o decréscimo da infiltração de água nos Latossolos brasileiros (ROTH & PAVAN, 1991). Além disso, a grande mobilidade da ADA pode prover meios para o transporte de substâncias pouco solúveis por distâncias imprevisíveis (BERTSCH & SEAMAN, 1999). As funções do solo no ambiente, como filtragem da água percolante, imobilização e transformação de substâncias, são bastante dependentes do estado de agregação dos solos. Conseqüentemente, a desagregação e dispersão de argila é um processo que causa grande impacto ambiental, já que o rompimento de agregados pode liberar, além da ADA, nutrientes (MOURA FILHO & BUOL, 1976); e biocidas Recebido para publicação 31.07.02 Aprovado em 04.06.03

show abstract

“…The eluviated clay accumulates in argillic horizons of Ultisols and Alfisols (e.g. Eswaran 1972;James et al 1997). Because of a lower content of allophanic material, stable humus-metal complexes are less important in lava soils than in Andisols.…”

Section: Weathering and Pedogenesis In Lavamentioning

confidence: 99%

“…A number of soil orders occur along a basalt toposequence in humid tropical Nicaragua (Eswaran 1972). The basalt comprises calcic plagioclase with minor amounts of olivine, augite, magnetite and glass.…”

Section: Examples Of Soils In Lavamentioning

confidence: 99%

Volcanic soils: their nature and significance for archaeology

James

Chester

Duncan³

2000

View full text Add to dashboard Cite

Whereas previous reviews of volcanic soils are biased in favour of those in tephra, the present paper examines the nature of weathering and pedogenesis in both tephra and lava. The classification of volcanic soils is discussed and examples are described of the response of pedogenesis to variations in climate, drainage, topography, vegetation and type and age of parent material. Archaeological implications considered include the distinctive properties of soils in tephra and the problems these may pose for laboratory analysis, evidence from buried soils, the ages of soils and their rates of development, and the fertility and erosion of volcanic soils.

show abstract

Micromorphological indicators of pedogenesis in some tropical soils derived from basalts from Nicaragua

Cited by 50 publications

References 5 publications

Red ferruginous soils of tropical Indian environments: A review of the pedogenic processes and its implications for edaphology

Red ferruginous soils of tropical Indian environments: A review of the pedogenic processes and its implications for edaphology

Partículas coloidais, dispersão e agregação em latossolos

Volcanic soils: their nature and significance for archaeology

Contact Info

Product

Resources

About