Roles of iron and clay in Genesis of acid soils under a humid, temperate climate

Duchaufour, P.; Souchier, B.

doi:10.1016/0016-7061(78)90046-0

Cited by 47 publications

(15 citation statements)

References 2 publications

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“…The parent materials are known to influence soil-acidifying processes through effects on mobility of organic acids (Duchaufour and Souchier, 1978;Ugolini and Sletten, 1991). This influence is also observed in our study, where the concentrations of organic acids were lowest in clayey KR2 soil from mudstone (Table 6).…”

Section: Factors Controlling Proton Generation and Consumption In Soisupporting

confidence: 79%

Acidification of tropical forest soils derived from serpentine and sedimentary rocks in East Kalimantan, Indonesia

et al. 2011

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Section: Factors Controlling Proton Generation and Consumption In Soisupporting

confidence: 79%

Acidification of tropical forest soils derived from serpentine and sedimentary rocks in East Kalimantan, Indonesia

et al. 2011

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“…Souchier's coefficients K Al and K Fe are higher in the Bshorizons of the north-forest (maximal value of 8.6) and -to a lesser extent -south-forest sites (Orelle) than in the Bw-horizons of the meadow site (Thyl), although one profile under meadow (Thyl 6) appears to indicate incipient translocation ( Table 4). The range of these indexes looks comparable with those estimated by (Duchaufour and Souchier, 1978) for acid cambisol and podzol, e.g. K Al = 1 and K Fe = 1 for a representative acid Cambisol and K Al = 4.5 and K Fe = 4.2 for a representative Podzol from the Eastern France (Vosges Mountains) but definitely lower than those found in Michigan (Schaetzl et al, 2006).…”

Section: Chemical Extractions and Ratiossupporting

confidence: 55%

“…The redistribution coefficient of Al o and Fe o for each B-horizon is based on Souchier's coefficient (Souchier, 1971;Duchaufour and Souchier, 1978). This type of coefficient (K Al and K Fe ) has been recently applied by Schaetzl et al (2006) to estimate the gain in aluminium or iron in B-horizons at the expense of the eluvial zone (E-horizons).…”

Section: Calculations and Statisticsmentioning

confidence: 99%

Distinguishing subalpine soil types using extractible Al and Fe fractions and REE geochemistry

et al. 2008

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“…The relationship between Fe t content and soil texture mostly on the content of fraction <0.002 mm was also reported by Muhs et al (2001). Due to chemical weathering of silicates and aluminosilicates and because of the mineralization of organic residue, releasing iron oxides can be accompanied by a slight increase in the clay fraction (Duchaufour and Sochiers 1978). The contents of free pedogenic iron (Fe d ) varied across the profiles, similarly as the contents of total iron (Table 3).…”

Section: Resultsmentioning

confidence: 78%

Iron oxides as weathering indicator and the origin of Luvisols from the Vistula glaciation region in Poland

2015

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Purpose The aim of the research was to determine the effect of lithogenic and pedogenic processes on the formation of Luvisols from the area of Vistula glaciation on the base of profile distribution of iron oxides and total iron in relation to texture and physicochemical properties. The indices of weathering of the soil material in genetic horizons were calculated, and changes in the content and forms of iron oxides were evaluated. Materials and methods The predominant type of soil in the study area is Luvisols under agricultural use, formed from silt formations on loam. The analyses were made applying the following methods: grain size composition using the sieve method and hydrometer method, the interpretation of the results was performed according to the World Reference Base for Soil Resources classification, the pH of soils was measured with the potentiometric method, C-organic with the WalkleyBlack dichromate method, the content of the following iron forms was determined (total iron (Fe t ) after the mineralization of soils in the mixture of HF and HClO 4 acids), free iron oxides were extracted using dithionite-citrate-bicarbonate method, and amorphous iron oxides after the ammonium oxalate extraction (using the Philips 9100PU apparatus). The clay mineralogy was estimated by X-ray diffraction analysis. Results and discussion It was observed that total iron enrichment occurs in argic horizons accompanied by iron depletion in luvic horizons, while the profile distribution of iron is similar to the distribution of clay. The (Fe d /Fe t ) ratio indicates a low degree of weathering; the highest values were observed in argic (Bt) horizons, which confirms the effect of the process of pedogenesis on the value of that index. In the soils investigated, crystalline iron oxides generally dominate over the amorphous forms. The mineralogical composition of clay fraction separated from the upper part of soils was different as compared to the underlying material. Conclusions The results of the study showed that iron contents (together with the other indicators) and its forms can be used to distinguish soil layers of different origin. The depth distribution of Fe d , Fe o and Fe t within soil profiles indicates that the soil material may be of different lithogenic origin in the studied pedons.

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Roles of iron and clay in Genesis of acid soils under a humid, temperate climate

Cited by 47 publications

References 2 publications

Acidification of tropical forest soils derived from serpentine and sedimentary rocks in East Kalimantan, Indonesia

Acidification of tropical forest soils derived from serpentine and sedimentary rocks in East Kalimantan, Indonesia

Distinguishing subalpine soil types using extractible Al and Fe fractions and REE geochemistry

Iron oxides as weathering indicator and the origin of Luvisols from the Vistula glaciation region in Poland

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