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 ?
Map of soil sampling sites selected from Allophanic (A), Gley (?), Recent (?) and Brown (A) soil orders (North Island, New Zealand).
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).
2014) highlighted that Allophanic and Gley soils had lost large amounts of OC under intensive dairy management compared with drystock and that these soils may be more vulnerable to OC loss than anticipated.
The Pumice and Gley Soils were collected in 1998 and irrigation began 23 March 1999, with destructive soil sampling on 22 March 2001 and 13 March 2003.
Additionally, Thurston students Sean Gley placed second in the trumpet category, and Angelica Cole qualified for state.
Nine (Pumice and Gley Soils) or 12 (Allophanic and Recent Soils) VWC steps were used for establishing the calibration equations.
Three Thurston High School students, Tiffany Hilkey, Charlie Emery and Sean Gley, placed first, second and third, respectively, in the event's annual high school speech contest.
Summary: Communication Technologies Minister El Hadj Gley received on, Tuesday in Tunis, Mr.
UNIS, Sept 12, 2009 (TAP) -- The national commission entrusted with the migration towards Internet Protocol Version IPV6 held, on Saturday in Tunis, its first meeting under the chairmanship of communication technologies minister El Hadj Gley, with attendance of secretary of state in charge of information technology, Internet and free softwares Lamia Chaffai Seghaier and the participation of members of the commission issued from the concerned public bodies, Internet services suppliers and telecommunications network operators.
SPRINGFIELD - On a good day, Thurston High School junior Matt Gley practices percussion for three hours.