Chemical and mineralogical properties of soils in southeastern Nigeria in relation to aggregate stability

Igwe, C. A.; Akamigbo, F. O. R.; Mbagwu, J.S.C.

doi:10.1016/s0016-7061(99)00029-4

Cited by 80 publications

(51 citation statements)

References 18 publications

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“…That means the soil aggregates had very low stability due to their sweating following break down. Several authors (Igwe et al 1999;Lado et al 2004) found no positive correlations between SOM and aggregate stability. It means that SOM is the only factor responsible for aggregation processes and the mechanisms of the aggregate forming can be based on other principles, for example the bonding between mineral elements and sesquioxides, or on physical and chemical properties of clay minerals (Goldberg & Glaubig 1987;KÖgel-Knabner et al 2008).…”

Section: Resultsmentioning

confidence: 98%

Stability of soil aggregates and their ability of carbon sequestration

Šimanský¹,

Bajčan²

2014

Soil & Water Res.

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AbstractŠimanský V., Bajčan D. (2014): Stability of soil aggregates and their ability of carbon sequestration. Soil & Water Res., 9: 111-118.One of the most important binding agents for forming stable aggregates is a soil organic matter (SOM), which can be retained in various size fractions of aggregates. If aggregates are water-resistant, they retain more carbon. Therefore, the aim of this study was to evaluate the stability of aggregates and their ability of carbon sequestration in different soil types and soil management systems in Slovakian vineyards. The highest content of water-stable macro-aggregates (WSA ma ) was determined in Cambisols, and the lowest in Fluvisols. The highest content of WSA ma (size fraction 0.5-3 mm) was determined in Chernozems, decreasing within the following sequence: Fluvisols > Leptosols > Cambisols > Luvisols. The soil type had a statistically significant influence on the re-distribution of soil organic matter in size fractions of water-stable aggregates. The highest content of SOM in water-stable aggregates of the vineyards was determined in grassy strips in-between the vineyard rows in comparison to intensively cultivated rows of vineyard. The highest values of carbon sequestration capacity (CSC) in WSA ma were found in Cambisols > Leptosols and the lowest values of CSC were in Fluvisols. The microaggregates represented a significant carbon reservoir for the intensively cultivated soils (rows of vineyard). On the other hand, increasing of macro-aggregates (size fraction 0.5-3 mm) was characteristic for grassland soils (between the rows of vineyard).

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Section: Resultsmentioning

confidence: 98%

Stability of soil aggregates and their ability of carbon sequestration

Šimanský¹,

Bajčan²

2014

Soil & Water Res.

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“…Funcionam como agentes de ligação entre as partículas minerais, condicionando o tipo de estrutura do solo (Pinheiro-Dick & Schwertmann, 1996;Igwe et al, 1999;Muggler et al, 1999). Apesar disso, segundo alguns autores, os óxidos de ferro nem sempre influenciam a agregação (Desphande et al, 1968;Muggler et al, 1997;Muggler et al, 1999) e , em alguns casos, o efeito dos sesquióxidos pode ser atribuído à interação entre a matéria orgânica e os óxidos e, ou, o teor de argila (Guérif, 1990;Bartoli et al, 1992).…”

Section: Quadro 4 Coeficientes De Correlação Linear Entre Propriedadunclassified

Relações entre propriedades físicas e características de solos da região sul do Brasil

Giarola

Silva

Imhoff

2002

Rev. Bras. Ciênc. Solo

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“…Soil porosity was calculated from D b values as explained by Brady and Weil, (1999). The pH of samples was determined with a pH Meter both in a 1:2.5 sediment: water and sediment : 1 M KCl mixture as described by van Reeuwjik, (1993) and Igwe et al, (1999). Sediment EC was determined in the same 1 : 2.5 sediment : water suspension used for pH determination with a conductivity-meter (Okalebo et al, 1993).…”

Section: Methodsmentioning

confidence: 99%

Physico-chemical and Mineralogical Characterisation of Subsurface Sediments around Gaborone Landfill, Botswana

Ngole

Totolo

Ekosse

2005

Journal of Applied Sciences and Environmental Management

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Studies were carried out on subsurface sediments obtained around the Gaborone landfill area Botswana, in order to characterize their mineralogy and physico-chemistry, appraise any contaminant inputs from the landfill and assess their ability to attenuate contaminants from the landfill. Physico-chemical properties investigated included particle size distribution (PSD), moisture content, bulk density (D b ), porosity, surface area, pH, electrical conductivity (EC), and cation exchange capacity (CEC). The mineral phases occurring in the subsurface sediments were identified by use of X-ray powder diffraction (XRPD) technique. Grain size analyses of the subsurface sediments revealed sandy loam, silty loam, and silt as the main textural classes. The values obtained for D b and porosity is reflective of the textural classes of the different samples.Moisture content values of the studied samples are characteristic of sediments in semi-arid environments. Apart from two samples, which were acidic, others were alkaline. The EC values were indicative of significant amounts of total dissolved salts (TDS) especially along the eastern corner of the landfill. Cation exchange capacity values were relatively low. Minerals identified by XRPD included quartz, microcline, muscovite and kaolinite in bulk subsurface sediments, whereas kaolinite, smectite and /or illite occurred in the clay fractions. Sediment pH, EC and TDS suggests inputs from the landfill. The sediments seem to have a low attenuation capacity as a result of their physico-chemical and mineralogical properties. Further geophysical and hydrogeochemical research is needed to verify if the Gaborone landfill area is environmentally safe. @JASEM

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Chemical and mineralogical properties of soils in southeastern Nigeria in relation to aggregate stability

Cited by 80 publications

References 18 publications

Stability of soil aggregates and their ability of carbon sequestration

Stability of soil aggregates and their ability of carbon sequestration

Relações entre propriedades físicas e características de solos da região sul do Brasil

Physico-chemical and Mineralogical Characterisation of Subsurface Sediments around Gaborone Landfill, Botswana

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