How fast are soil-forming processes in Quaternary sediments of a tropical floodplain? A case study in southeast Brazil

Celarino, André Luiz de Souza; Ladeira, Francisco Sérgio Bernardes

doi:10.1016/j.catena.2017.04.002

Cited by 6 publications

(5 citation statements)

References 44 publications

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“…The average values of CIA and Si/(Fe + Al) were 80.47% and 4.53 and 76.45% and 5.93 for the studied surface and deep soil, respectively. It can be regarded that both surface and deep soils were highly weathered (Nesbitt & Young, 1982), which was consistent to the conclusion of Celarino and Ladeira (2017). From Table 1, it can be seen that TOC content, CIA, and Si/(Fe + Al) of surface soil were higher and less than those of deep soil, indicating that pedogenic intensity of surface soil was stronger than that of deep soil.…”

Section: Resultssupporting

confidence: 82%

Magnetic Difference Between Deep and Surface Soil Within an Agricultural Area in Southern China: Implications for Magnetic Mineral Transformation During Pedogenic Process Under Subtropical Climate

Ouyang

Guo

et al. 2020

Earth and Space Science

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Mineral magnetism is proved as a sensitive method of pedogenesis by numerous studies. However, formation pathways of magnetic minerals and subsequent magnetic response are quite different under different climate. In order to improve the understanding of magnetic assemblages in paddy soil layers in relation to soil formation conditions, a systematic magnetic investigation was performed for surface and its corresponding deep soil collected from 70 sampling sites within a paddy soil area under subtropical climate, south China. Rock magnetic results showed that superparamagnetic, single-domain, and multiple domain maghematite and hematite were produced during ferrallitization pedogenic processes. Some fine superparamagnetic and single-domain ferrimagnetic particles were dissolved during late gleyization of paddy soil formation with increased organic matter and reductive condition. As a result, magnetism of surface soil was weaker than that of deep soil despite basically consistent magnetic mineral composition.

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Section: Resultssupporting

confidence: 82%

Magnetic Difference Between Deep and Surface Soil Within an Agricultural Area in Southern China: Implications for Magnetic Mineral Transformation During Pedogenic Process Under Subtropical Climate

Ouyang

Guo

et al. 2020

Earth and Space Science

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“…The coatings were darker than the matrix background, indicating temporary reducing conditions. Similar features were observed by Celarino and Ladeira (2017) in the Bg horizon of a Fluvic Gleysol.…”

Section: Pedogenic Oxides Mineralogy Micromorphology and Genesissupporting

confidence: 82%

“…Micromorphological analysis of the B horizon of Planosol revealed coarse material dominated by better sorted, finer-grained quartz than that of Fluvisol. These features, as well as the higher proportions of fine sand and silt, suggest lower transport energy during the fluvial processes that brought these materials (Celarino and Ladeira, 2017).…”

Section: Pedogenic Oxides Mineralogy Micromorphology and Genesismentioning

confidence: 99%

“…These favorable conditions are associated with soil geomorphological position, geology, rain seasonality, and fluvial systems (Palmer, 2013). Soil analyses can also contribute to identifying anthropogenic sources of pollutants, particularly herbicides used in agriculture (Gama et al, 2017) and by reconstruction of climate changes recorded in sedimentation patterns caused by alterations in river course and discharge (Damm and Hagedorn, 2010;Celarino and Ladeira, 2017;Bliedtner et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…The relative lack of genetically developed soils, the complexity of their distribution across the landscape, and the limited potential for medium-to high-technology agriculture in the study area have discouraged a detailed study of these soils in the past. However, there has been increasing interest in alluvial soils because of their importance to ecological and paleoclimate studies (Buol et al, 2011;Celarino and Ladeira, 2017;Skorupa et al, 2017). Furthermore, their fragility (Mota and Valladares, 2011;Mota et al, 2012), particularly in relation to salinization (Cabral et al, 2019), necessitates an in-depth understanding of their characteristics, as about 70 % of the Acaraú River basin is considered vulnerable (Mota and Valladares, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Alluvial soil formation in the plains of northeastern Brazil

Cipriano-Silva

Valladares

Azevedo

et al. 2020

Revista Brasileira De Ciência Do Solo

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Soils in alluvial plains of the lower course of the Acaraú River, Ceará State, Brazil, are weakly developed and have a complex distribution in the landscape. This study reports the pedogenic characterization of such soils in an effort to understand their formation. Soil pits were opened in four representative sites, profile morphology was described, and soil samples were collected for chemical, physical, mineralogical, and micromorphological analyses. All profiles had weak pedogenic development, as inferred from their morphological characteristics, lack of B horizon, and high silt/clay ratio. Organic carbon and particle size distributions were heterogeneous in Fluvisol, Planosol, and Solonchak, in agreement with their sedimentary nature. Intrinsic characteristics of each profile indicated variations in pedogenic processes related to depositional conditions, which, in turn, were determined by the alluvial nature of sediments and water table dynamics. Consequently, Fluvisols at higher elevations showed reduced pedogenic development. In adjacent areas, Planosols showed pores filled with clay minerals and a texture gradient, indicative of past lessivage. Vertisol was identified in small depressions and exhibited intense pedoturbation and high sodium concentration in deep layers. Solonchak had a high degree of hydromorphism, high sodium concentration, and high electrical conductivity. The distinct pedogenesis of alluvial plain soils in Northeastern Brazil is evidenced by their morphological, chemical, and physical properties.

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Geomorphological Evolution of River Forms in Humid and Semi-arid Tropical Environments

Valezio

Lima²,

Filho³

2022

Springer Proceedings in Earth and Environmental Sciences

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How fast are soil-forming processes in Quaternary sediments of a tropical floodplain? A case study in southeast Brazil

Cited by 6 publications

References 44 publications

Magnetic Difference Between Deep and Surface Soil Within an Agricultural Area in Southern China: Implications for Magnetic Mineral Transformation During Pedogenic Process Under Subtropical Climate

Magnetic Difference Between Deep and Surface Soil Within an Agricultural Area in Southern China: Implications for Magnetic Mineral Transformation During Pedogenic Process Under Subtropical Climate

Alluvial soil formation in the plains of northeastern Brazil

Geomorphological Evolution of River Forms in Humid and Semi-arid Tropical Environments

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