Classification des sols bruns ocreux et cryptopodzoliques par analyse des extraits tetraborates tamponnes a ph 9,5

Bruckert, S.

doi:10.1016/0016-7061(79)90019-3

Cited by 17 publications

(16 citation statements)

References 7 publications

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“…C, Fe and Al were also extracted with 0.1 M Na-pyrophosphate at pH 10 (C,, Fe, and Alp) (Bascomb, 1968) and 0.1 M NaOH/Na-tetraborate buffered at pH 9.7 (C,, Fen and AI,) (Bruckert, 1979). using a soil to solution ratio of 1 : 25 (3 x 30 min of rotative shaking).…”

Section: Anaivtica1 Methodsmentioning

confidence: 99%

“…It is generally agreed that acid ammonium oxalate dissolves amorphous hydrous oxides of iron and aluminium (Schwertmann, 1964), that acid ammonium oxalate + Na-dithionite also extracts well-crystallized iron oxides ('free iron') (Bascomb, 1968) and that Na-pyrophosphate at pH 10 has a more selective action on Fe and Al bound to organic matter ('organo-metallic complexes') (McKeague, 1967;Bascomb, 1968;Ball and Beaumont, 1972). More recently, Bruckert (1979) and co-authors (Bruckert and Metche, 1972;Bruckert el al., 1975; have proposed the use of a 0.1 M solution of NaOH buffered at pH 9.7 by Na-tetraborate to extract organo-metallic complexes (particularly those of iron) and have shown that the amounts extracted were significantly higher in the spodic horizons of podzolized soils than in the cambic horizons of brown earths. Furthermore, the Fe/AI ratio ofthe NaOH/Na-tetraborate extract may also be used as a good criterion for separating brown earths from young podzolized soils.…”

Section: Chemical Analysismentioning

confidence: 99%

“…Nevertheless, in spite of the presence, below the A, which is frequently of moder type, of a vivid brown or ochreous horizon with a well-expressed loose fluffy structure, the field-diagnosis of ochreous brown earths raises many difficulties. T o differentiate ochreous brown earths from acid brown earths and from brown podzolic soils, selective chemical or biochemical criteria are therefore required, such as those proposed recently by French soil scientists Bruckert, 1979).…”

Section: Introductionmentioning

confidence: 99%

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Chemical and mineralogical properties of sandy and loamy‐sandy ochreous brown earths in relation to incipient podzolization in a brown earth—podzol evolutive sequence

Herbauts

1982

Journal of Soil Science

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Chemical and mineralogical properties of ochreous brown earths have been studied with particular reference to: ( I ) the distribution within the profiles of Fe and Al compounds; (2) the occurrence ofsmectite-like clay minerals in surface horizons.Ochreous brown earths studied belong to a developmental sequence of forest soils, from acid brown earths to ferric podzols, developed on sandy or loamy-sandy acid parent materials. In such a soil sequence, both selective chemical and mineralogical data show clearly that podzolization is already active in ochreous brown earths, whereas such an incipient podzolization is quite undetectable by direct morphological observations.The distribution patterns of amorphous Fe and AI hydrous oxides and organic associations, clearly show the intergrade character of ochreous brown earths, when compared with the vertical distribution of Fe and Al forms in acid brown earths and podzolized soils. The Fe/AI ratio of both an NHJ-oxalate extract and an NaOH/Na-tetraborate extract buffered at pH 9.7, measured in the A1 B diagnostic horizon of ochreous brown earths, is a particularly appropriate and useful genetic criterion for the detection of incipient podzolization.Moreover, the presence of expansible clay minerals (degradafion smecfires) in the clay-sized fraction of the surface horizons of ochreous brown earths (A, and A1 B) can be considered as supplementary evidence of incipient podzolization.

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Section: Anaivtica1 Methodsmentioning

confidence: 99%

Section: Chemical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical and mineralogical properties of sandy and loamy‐sandy ochreous brown earths in relation to incipient podzolization in a brown earth—podzol evolutive sequence

Herbauts

1982

Journal of Soil Science

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“…Bruckert (1979) proposed using the Fe/Al ratio from buffered tetraborate extracts (pH 9.5) to classify brown soils (sols bruns) and podzolized soils (sols podzolisés). Podzolized soils had a ratio greater than 1 and brown soils a ratio less than 1.…”

Section: Chemicalmentioning

confidence: 99%

Podzols and Podzolization in Temperate Regions

Mokma

Buurman

1987

Soil Science

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“…Defining pools of solid-phase OM, and especially of solid-phase Al and Fe, with different reactivity is a well-known experimental problem that has led to the development of several selective extraction procedures. Examples are extractions with ammonium oxalate/oxalic acid, sodium pyrophosphate, sodium tetraborate, and copper chloride (e.g., Schwertmann, 1964;McKeague et al, 1971;Bruckert, 1979;Juo and Kamprath, 1979;Wada, 1989). While such extractions can give an estimate of the amount of ªreactiveº solid-phase OM, Al, and Fe, they are all operationally defined and therefore carry an inherent uncertainty.…”

Section: Definition Of ªReactiveº Om Al and Fementioning

confidence: 99%

Modeling aluminum solubility in intrazonal podzols using WHAM‐S/Model V

Jansen

Mulder

Verstraten

2005

Z. Pflanzenernähr. Bodenk.

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PNSS P167/1B SummaryÐZusammenfassungSo far, research in the area of podzolization has not resulted in consensus about the role of organic matter (OM) in regulating the transport and accumulation of Al and Fe at depth. From previous laboratory studies of the role of OM as a driver for podzolization in two intrazonal podzols, we concluded that it controls the mobilization of Al and Fe in A horizons and regulates the immobilization of Al in upper B horizons. In contrast, the solubility of Al in lower B horizons is mainly regulated by equilibrium with its secondary inorganic phases, as is the case for Fe in all B horizons. In the present study, we tested the conclusions with respect to Al through the application of the comprehensive metal-binding model WHAM-S 1.0/ Model V. Using CuCl 2 -extractable Al in horizons with insitu pH < 4.3 and ammonium oxalate/oxalic acid-extractable Al in horizons with in-situ pH > 4.3 as an estimate of the ªreactiveº pools of solid-phase Al, we were able to get reasonable to good descriptions of the measured total Al concentrations in all horizons studied. These results vindicate the use of WHAM-S 1.0 to help interpret complex interactions between metals and OM as they occur in the podzolization process. They also support our previous conclusions with respect to the mechanisms governing the solubility and mobility of Al in intrazonal podzols.

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Classification des sols bruns ocreux et cryptopodzoliques par analyse des extraits tetraborates tamponnes a ph 9,5

Cited by 17 publications

References 7 publications

Chemical and mineralogical properties of sandy and loamy‐sandy ochreous brown earths in relation to incipient podzolization in a brown earth—podzol evolutive sequence

Chemical and mineralogical properties of sandy and loamy‐sandy ochreous brown earths in relation to incipient podzolization in a brown earth—podzol evolutive sequence

Podzols and Podzolization in Temperate Regions

Modeling aluminum solubility in intrazonal podzols using WHAM‐S/Model V

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