Extractable Iron in Relation to Soil Age on Terraces Along the Truckee River, Nevada

Alexander, Earl B.

doi:10.2136/sssaj1974.03615995003800010037x

Cited by 68 publications

(42 citation statements)

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“…The distribution of dithionite extractable Fe has been used by a number of workers as an index of soil development (ALEXANDER, 1974;MAHANEY and SANMUGADAS, 1986). The results in this study for dithionite extractable Fe show that it increases and changes position in the profile with age.…”

Section: Selected Chemical Properties Of the < 2 MM Fractions Of The mentioning

confidence: 66%

“…Many chronosequence studies reveal that over time organic matter content increases, and soluble salts, basic cations and pH decrease (CROCKER and MAJOR, 1955;DICKSON and CROCKER, 1954;FRANZMEIER et al, 1963). The development of Fe oxides in the soil provides an index of time (ALEXANDER, 1974;CAMPBELL, 1971;MAHANEY and SANMUGADAS, 1986) and changes in clay mineralogy and total clay content reflect the time factor (AHMAD et al, 1977).…”

Section: Introductionmentioning

confidence: 99%

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Soil Development as a Function of Time in the Rouge River Basin, South-Central Ontario

Mahaney¹,

Sanmugadas²

2007

gpq

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Three soils of postglacial age, representing a chronosequence in the Rouge River Basin of south-central Ontario, were studied to determine variations in morphological, physical, chemical, and mineralogical properties. These soils, forming in alluvium of mixed mineralogy represent the Late HoIocene (Entisol), Middle Holocene (lnceptisol),and Early Holocene (lnceptisol) surfaces. Horizon differentiation and soil thickness increase with greater age, while pH drops slightly in the sola of the older profiles. Cation exchange capacity (CEC) and organic matter in the surface horizons increases slightly with age, while, for the most part, CaCO3 and Ca/ Mg ratio decrease. Significant changes occur over time, especially with an increase of dithionite-extractable iron with age (from ~ 0.20 in the Late Holocene soil to ~ 0.70 in the Middle to Early Holocene profiles). Illite and illite-smectite tend to decrease with age, being replaced by small amounts of chlorite and vermiculite. In spite of some variability in parent materials due to stratification and preweathering, and minor changes in species composition, the changes in soil properties are attributed to processes of soil formation acting over time.

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Section: Selected Chemical Properties Of the < 2 MM Fractions Of The mentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Soil Development as a Function of Time in the Rouge River Basin, South-Central Ontario

Mahaney¹,

Sanmugadas²

2007

gpq

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“…Some have used characteristics of the soil profile as a whole (Harden, 1982;Harden and Taylor, 1983;McFadden, Ritter and Wells, 1989;Harvey and Wells, 2003), while others have focused on the B-horizon, dealing with soil colour (see Hurst, 1977), pedogenic iron oxides (see Alexander, 1974;White and Walden, 1997) or magnetic mineral behaviour (White and Walden, 1994;Pope, 2000;Pope and Millington, 2000).…”

Section: Post-depositional Modification Of Dry-region Fan Surfacesmentioning

confidence: 99%

Dryland Alluvial Fans

Harvey

2011

Arid Zone Geomorphology

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“…Their have been used to identify diagnostic horizons (McKeague and Day, 1966), while Alexander (1974) used the same parameter to estimate the age of soils he studied. A constant dithionite extractable Fe 2 O 3 to clay ratio with depth reported by Juo (1981) indicates a downward migration of iron oxides and clays (Omenihu et al, 1984).…”

Section: Introductionmentioning

confidence: 99%

Forms and contents of iron and aluminum in inland flood plains of South-Eastern Nigeria

Ibia¹

2009

Agronomie Africaine

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Fourteen representative soils from inland flood plains in Southeastern Nigeria were studied to characterise forms (crystalline and amorphous) contents in iron and aluminium oxides. Total iron and aluminium, extracted using HCI after fusion with Na 2 CO 3 , ranged from 1.25 to 7.74 % by weight of dry soil, with a mean of 3.29 % for total Fe 2 O 3 and from 9.75 to 44.67 % with a mean of 26.04 % for total Al 2 O 3 . Broad textural grouping of the soils showed mean total contents of Fe 2 O 3 and Al 2 O 3 comparable to fine-textural soil, medium-textured soil, and coarse-textured soil. On the basis of drainage, mean contents of total iron and aluminum are, in a decreasing order : very poorly drained, poorly drained and imperfectly drained soil. Total free oxides (DCB extractable forms) averaged 0.59 and 0.16 %, for DCB Fe 2 O 3 and DCB Al 2 O 3 , respectively. The fine texture soil gave the highest mean value (0.90 %) for DCB Fe 2 O 3 , as compared to medium and coarse texture soils. Generally, values of oxalate extractable and pyrophosphate extractable Fe 2 O 3 were relatively low. The reactivity of the sesquioxides, measured using the ratio of oxalate extractable-to dithionite extractable iron and aluminum, tended to be high, indicating that much of the total free oxides exists mainly in the form of amorphous oxides and, which, impeded drainage. Active ratios of Al 2 O 3 were generally higher than those of Fe 2 O 3 . The extractability of total free iron ranged from 8.50 to 25.3 % while that of aluminum ranged from 0.26 to 1.84 %, suggesting a relatively less weathering of these inland plain soils (Wetland soils). Key-words :Aluminum, iron, soil, inland flood plains, Nigeria. RESUME FORMES ET TENEURS EN FER ET EN ALIMINIUM DES PLAINES DES BAS-FONDS DU SUD-EST DU NIGERIA Quatorze sols représentatifs des bas-fonds du Sud-Est du Nigeria ont été utilisés dans cette étude. Des échantillons de sols ont été caracteristisés au laboratoire pour déterminer les formes et les teneurs en oxydes, fer et aliminium libres. La teneur en fer et aliminium extractible par

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Extractable Iron in Relation to Soil Age on Terraces Along the Truckee River, Nevada

Cited by 68 publications

References 0 publications

Soil Development as a Function of Time in the Rouge River Basin, South-Central Ontario

Soil Development as a Function of Time in the Rouge River Basin, South-Central Ontario

Dryland Alluvial Fans

Forms and contents of iron and aluminum in inland flood plains of South-Eastern Nigeria

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