Soils of the Andept Suborder in Alaska

Simonson, Roy W.; Rieger, Samuel

doi:10.2136/sssaj1967.03615995003100050024x

Cited by 14 publications

(3 citation statements)

References 0 publications

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“…In the Tundra Zone, soil derived from volcanic ejecta and manifesting the effects of melanization are particularly evident in the Aleutian Islands of Alaska. Here they have developed in a cool, wet climate under a mixed moss-grass-shrub vegetation (Simonson and Rieger, 1967;Flach, 1964).…”

Section: Melanizationmentioning

confidence: 99%

Pedogenic Zonation in the Well-Drained Soils of the Arctic Regions

Ugolini

1986

Quat. res.

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Pedogenic zonation in the soils of the polar regions is a result of gradients in environmental factors and attendant chemical processes. Along a latitudinal transect, it is best manifested at well-drained sites and by soils developed on predominantly silicate rocks. Selected sites in arctic Alaska, in the Canadian arctic, Greenland, and Svalbard adequately fulfill these prerequisites. The processes of podzolization, decarbonization-carbonization, pervection, and salinization as models of arctic pedogenesis demonstrate that processes occurring in the temperate region also operate in the Far North. Brunification, melanization, and oxidation are recognized for the first time as current geochemical and pedogenic mechanisms of the Arctic region. Traditional genetic soil names have been retained because they represent a closer relationship to pedogenic processes than the more modern nomenclature. The identification, the chemical behavior, the strength, abundance, and mobility of the proton donors and conjugate bases are keys to the genesis of soils and the distinction of contrasting soil processes. This new approach to the understanding of arctic pedogenesis can be better fulfilled by collecting, analyzing, and interpreting soil solution obtained in situ.

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Section: Melanizationmentioning

confidence: 99%

Pedogenic Zonation in the Well-Drained Soils of the Arctic Regions

Ugolini

1986

Quat. res.

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“…It quickly develops a periodically dry, decomposing mulch layer, 10-20 cm deep, that often prevents successful establishment of hardwood and spruce seedlings (Mitchell and Evans 1966). A bluejoint disclimax may last for 25 to 200 years (Collins and Schwartz 1998, Simonson and Rieger 1967, Lutz 1963.…”

Section: Abstract: Calamagrostis Canadensis Overstocking Forage Qumentioning

confidence: 99%

Journal of Range Management, Volume 54, Number 3 (May 2001)

2001

REM

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“…decomposing mulch layer, 10-20 cm deep, that often prevents successful establishment of hardwood and spruce seedlings (Mitchell and Evans 1966). A bluejoint disclimax may last for 25 to 200 years (Collins and Schwartz 1998, Simonson and Rieger 1967, Lutz 1963.…”

mentioning

confidence: 99%

Canadian Bluejoint Response to Heavy Grazing

Collins¹,

Becker²,

Collins³

2001

Journal of Range Management

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A disclimax stand of Canadian bluejoint (Calamagrostis canadensis (Michx.) Beauv.) was heavily grazed by cattle and horses for 4 years to weaken the grass's competition with hardwoods important as browse and cover to wildlife. Stocking at 0.084 ha AUM-1 resulted in uniform utilization of bluejoint and maintenance of early phenology through the growing season. Etiolated bluejoint declined about 90%, but grass production increased 10 to 15%, as fireweed (Epilobium angustifolium L.), a principal herbaceous component of the stand, decreased in response to trampling. Rhizomes of heavily grazed bluejoint had lower total nonstructural carbohydrates (TNC) (p = 0.0127), lower weight (g cm-1 length) (p = 0.05), and reduced biomass (g cm-3 of soil) (p = 0.05). Shoots of grazed bluejoint maintained higher nitrogen (p = 0.0001) and higher digestibility (IVDMD) (p = 0.0017) than bluejoint that was never grazed. This enabled heavily grazed bluejoint to retain good forage quality through the entire growing season, as opposed to ungrazed bluejoint, which became poor forage at the time of flowering during early July. Following one season of rest, rhizome TNC, shoot nitrogen, and IVDMD returned to levels of never grazed bluejoint. Seedhead production, seed production, seed weights, and seed viability of rested bluejoint were about the same as in ungrazed stands. On wet sites, heavy grazing does not adequately reduce the vigor of this grass.

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Soils of the Andept Suborder in Alaska

Cited by 14 publications

References 0 publications

Pedogenic Zonation in the Well-Drained Soils of the Arctic Regions

Pedogenic Zonation in the Well-Drained Soils of the Arctic Regions

Journal of Range Management, Volume 54, Number 3 (May 2001)

Canadian Bluejoint Response to Heavy Grazing

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