CHARACTERIZATION AND CLASSIFICATION OF FIVE SOILS FROM EASTERN CANADA HAVING PROMINENTLY MOTTLED B HORIZONS
Soils having prominently mottled B horizons containing marked accumulations of dithionite-extractable Fe relative to the A and C horizons occurred both in moderately weathered soils from Nova Scotia and in slightly weathered soils in Ontario. The Nova Scotia soils had acid sola of low base saturatio...
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Veröffentlicht in: | Canadian journal of soil science 1971-10, Vol.51 (3), p.483-497 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Soils having prominently mottled B horizons containing marked accumulations of dithionite-extractable Fe relative to the A and C horizons occurred both in moderately weathered soils from Nova Scotia and in slightly weathered soils in Ontario. The Nova Scotia soils had acid sola of low base saturation, horizons of clay accumulation and apparent weathering of clay-size mica to expansible minerals in the Ae horizons, as well as B horizons enriched in Fe. One of these soils had B horizons with properties diagnostic of Bt (clay), Bf (organic matter-Al, Fe complexes) and Bgf (dithionite Fe) horizons. Only one of the three Nova Scotia soils was a Fera Eluviated Gleysol in the Canadian system. All of them would probably be classified as Aerie Ochraqualfs in the U.S. system, and probably as pseudogleys in Europe. The two Ontario soils were highly base saturated; they lacked Bt and Bf horizons, and one (Castor) had a Bgf horizon according to the present criteria. The brownish-colored mottles in both the Ontario and the Nova Scotia soils contained secondary goethite. We consider that the separation of Fera subgroups is desirable, but the present chemical criteria are not closely related to morphology and greater emphasis on morphology in the definition may be necessary. |
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ISSN: | 0008-4271 1918-1841 |
DOI: | 10.4141/cjss71-064 |