The spatial variability of erodibility and its relation to soil types: a study from northern Ghana

Veihe, Anita

doi:10.1016/s0016-7061(01)00120-3

Cited by 62 publications

(32 citation statements)

References 15 publications

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“…The wateraggregate stability was also significantly correlated with the content of sand ( p b 0.01), clay ( p b 0.001), organic matter ( p b 0.05) and lime ( p b 0.01). In contrast, sand decrease the water-aggregate stability, which agrees with Veihe (2002). The role of the clay and organic matter as a binding agent in improving the aggregation of soil colloids was also reported by Skidmore and Layton (1992) and Bartoli et al (1992).…”

Section: Soil Properties-k Factor Relationshipssupporting

confidence: 85%

Modeling the USLE K-factor for calcareous soils in northwestern Iran

et al. 2008

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Section: Soil Properties-k Factor Relationshipssupporting

confidence: 85%

Modeling the USLE K-factor for calcareous soils in northwestern Iran

et al. 2008

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“…Two of the soil types (Mollisol SS6 and Oxisol WW) were from environments with a very low fire frequency (no regular fire occurrence) and had a moderate (Mollisol) [ Skjemstad et al , 1999; Schmidt et al , 2001] and high (Oxisol) [ Skjemstad et al , 1990] protective capacity (determined by clay content and aggregate stability) [ Stace et al , 1968; Birkeland , 1984; Oades and Waters , 1991]. The third soil (Pellustert SS8) [ Skjemstad et al , 1999; Schmidt et al , 2001] was collected from an ecosystem with a high fire frequency (fire occurring at regular intervals over decadal timescales), and the soil had a comparably low capacity for protection of organic matter by the mineral matrix [ Stace et al , 1968; Veihe , 2002]. The organic carbon fractions of each sample were characterized using a suite of analyses, including nuclear magnetic resonance ( 13 C‐NMR) spectroscopy, accelerator mass spectrometry (AMS) for radiocarbon, δ 13 C analyses, and scanning electron microscopy (SEM).…”

Section: Methodsmentioning

confidence: 99%

Importance of charcoal in determining the age and chemistry of organic carbon in surface soils

et al. 2006

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[1] Understanding the chemical character and turnover time of the oldest soil organic carbon (SOC) fraction is fundamental in deciphering soil carbon sequestration processes and the fate of soil-eroded carbon in aquatic sediments. Two main processes are thought to extend the turnover time of SOC: protection by the mineral matrix and chemical recalcitrance. Various oxidation methods have been proposed to isolate the oldest and most recalcitrant SOC fraction, which is often assumed to be black carbon (BC). However, few data have been published that confirm the chemical character of the isolated fractions. Using established and newly developed methods together with 13 C-NMR spectroscopy and AMS dating, we show that protection by the mineral matrix prolonged the turnover time of SOC by tens of years, but long-term (hundreds of years) stabilization was controlled by the inherent recalcitrance of SOC, determined by the type of ecosystems. In ecosystem without significant fire occurrences, the older SOC pool was comparably small and was represented by alkyl carbon. In ecosystems with high fire frequency charcoal constituted the oldest SOC pool, and constituted up to 35% of the total SOC. By applying methods with different oxidative strengths, it was possible to isolate different age groups of charcoal with different degrees of weathering. Further substantiation of this finding could provide a much greater resolution of paleo-fire events. Our results demonstrate that fire frequency plays a dominant role in determining the chemical nature and 14 C abundance of SOC and that the separation of age groups of charcoal provides a means to reconstruct detailed fire histories. Our results indicate that modeling SOC turnover, transport and sequestration for frequently burnt environments requires modification of existing models, specifying an input and decay function for the charcoal pool in different environments.

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“…Therefore, clarifying the spatial distribution of soil properties and determining they are related to soil erodibility is crucial. Previous studies have identified soil texture (i.e., primarily the proportion of sand and silt in the soil) and soil aggregate stability as key parameters in determining the soil erodibility in agricultural lands and mountain slopes [10][11][12][13][14]. However, few studies evaluating soil erosion and the relationship between soil erodibility and soil characteristics have been conducted in coastal areas.…”

Section: Introductionmentioning

confidence: 99%

Erosion Potential Estimation by Network Measurement of Soil Properties in Coastal Areas after Clearcutting

Jien

Lee

Chen

et al. 2015

International Journal of Distributed Sensor Networks

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Invasive white leadtrees (Leucaena leucocephala (Lam.) de Wit) are contributing to the destruction of coastal ecosystems and biodiversity in humid subtropical and tropical regions. Sudden clearcutting of invasive tress can lead to substantial soil loss, which subsequently reduces the efficiency when indigenous vegetation is restored. Soil samples ( = 142) were collected using the grid method to measure soil properties and to spatially analyze the soil erosion potential in the studied area after clearcutting of the invasive trees. Results indicated that the soil erosion rates ranged from 21 to 249 tons ha −1 yr −1 , and the eroded soil depths ranged from 0.30 to 3.40 cm yr −1 after clearcutting. The network measurements for determining the mortality ratio of the restored indigenous vegetation demonstrated that Ficus benjamina L., Macaranga tanarius, and Scaevola taccada (Gaertner) Roxb were likely to be susceptible to damage from the substantial amount of soil loss and low SOC content. During the period between clearcutting and establishing the next stand of plants for reforestation, the network measurements for determining the soil properties and estimating the spatial heterogeneity of soil erosion potential are regarded as a major issue of concern regarding the efficiency of subsequent restoration efforts.

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The spatial variability of erodibility and its relation to soil types: a study from northern Ghana

Cited by 62 publications

References 15 publications

Modeling the USLE K-factor for calcareous soils in northwestern Iran

Modeling the USLE K-factor for calcareous soils in northwestern Iran

Importance of charcoal in determining the age and chemistry of organic carbon in surface soils

Erosion Potential Estimation by Network Measurement of Soil Properties in Coastal Areas after Clearcutting

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