Gley


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gley

[glā]
(geology)
A sticky subsurface layer of clay in some waterlogged soils.

Gley

 

gleyed topsoil, the portion of the soil profile characterized by lack of structure, low porosity, and green, blue, dove-gray, or mixed dove-gray-red color. It is formed as a result of the gleying of soils, a complex set of processes predominantly microbiological and biochemical in nature, including reduction of mineral and organic substances with formation of unstable forms of oxides of iron, manganese, aluminum, and other elements accumulated in the soil; transformation of humic acids into fulvic acids; acidification of the soil reaction with entry into the absorbing complex of bivalent iron, hydrogen, and aluminum; destruction of alumosilicate minerals with neogenesis of clay minerals containing bivalent iron; and a number of other phenomena. It develops in various swamped and marshy soils in topsoils with difficult or no access to oxygen (under the influence of ground or surface waters). Gley exerts an adverse effect on the overwhelming majority of wild and cultivated plants. Reclamation of gleyed soils involves first of all drying them out—lowering the level of groundwater and eliminating excess surface waters. The term “gley” was first introduced into scientific literature by the Russian scientist G. N. Vysotskii (1905) and became international in soil science.

V. M. FRIDLAND

References in periodicals archive ?
not available Horotiu Te Kowhai Soil texture Silt loam Silt loam New Zealand soil class Typic Orthic Typic Orthic Allophanic Soil Gley Soil USDA Great Soil Group Hapludand Haplaquept Sand (%) 35 12 Silt (%) 49 58 Clay (%) 17 30 Mineralogy Amoiphic (Allophane) Kandic (Halloysite) Drainage class Well drained Poorly drained Annual rainfall (mm) 1264 1264 Mean monthly temp.
Gley, a straight-A student, plays percussion in the high school's symphony orchestra, jazz band, marching band and percussion ensemble.
5) peaty: poorly drained hydromorphic peaty gley soils (or histic gleysols), soil is wet in the superficial peat horizon periodically during the growing season or is wet for a long period, free water is commonly persistent at or near the surface;
Although PP lost in surface runoff was unaffected by soil type, SS losses were greater from the Pallic and Recent Gley soils than the Melanic and Brown soils (Table 2).
This is reflected in the expression of hydromorphic features (mottles, Fe-Mn concretions and gley colors) well represented in the two upper materials.
Gley E: Sur les effets de l'estirpation du corps thyroide.
Address : Immeuble Le Cinetic DGA AF / DAM 1 avenue du Docteur Gley
RKO, located within the drain, showed hydromorphic features (few, fine-medium, distinct gley mottles) below 0.
Among those being honored are Andrew Kronser of Thurston High, a National Merit Scholarship finalist with full tuition to Baylor University, and founder and director of the a capella group No Strings Attached; Ashlea Haney of Springfield High, a Gates Millennium Scholar ship winner; Kaylin Salladay of Thurston High, Miss Lane County Outstanding Tee; Matthew Selby of Thurston High, UO Presidential Scholar and Summit Scholarship recipient; Matt Gley of Thurston High, state champion in timpani and all-around percussionist; and Caleb Hartsfield of Springfield High, who was an "American Idol" Hollywood week finalist.
Presence of sulfidic materials, gley colours, mottling, texture, and high carbon are all valuable indicators of the lakebed.
Chairing the opening of this study day, the Minister of Communication Technologies, Mr Hadj Gley, said that the main aimAabehind the creation of the cyberpark Aawas to support young ICT promoters in setting up their projects.
The talk was attended by Minister of Communication Technologies El Hadj Gley.