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exchangeable ions
exchangeable ions Charged ions that are adsorbed on to sites (with a charge opposite to that on the ion) on the surface of the adsorption complex of the soil (mainly clay and humus colloids). Exchangeable ions can replace each other on this surface, and are also available to plants as nutrients. Although cations (e.g. calcium and magnesium) are the most common, exchanging at negatively-charged sites, some complexes (e.g. sulphate and phosphate) do exchange at positively-charged sites. See also CATION-EXCHANGE CAPACITY; and EXCHANGE CAPACITY.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "exchangeable ions." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "exchangeable ions." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O13-exchangeableions.html AILSA ALLABY and MICHAEL ALLABY. "exchangeable ions." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-exchangeableions.html |
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exchangeable ions
exchangeable ions Charged ions that are adsorbed on to sites, oppositely charged, on the surface of the adsorption complex of the soil (mainly clay and humus colloids). Exchangeable ions can replace each other on this surface, and are also available to plants as nutrients. Although cations (e.g. calcium and magnesium) are the most common, exchanging at negatively charged sites, some anions (e.g. sulphate and phosphate) do exchange at positively charged sites. See ANION-EXCHANGE CAPACITY; and CATION-EXCHANGE CAPACITY.
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Cite this article
MICHAEL ALLABY. "exchangeable ions." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "exchangeable ions." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O7-exchangeableions.html MICHAEL ALLABY. "exchangeable ions." A Dictionary of Plant Sciences. 1998. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-exchangeableions.html |
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exchangeable ions
exchangeable ions Charged ions that are adsorbed on to sites, oppositely charged, on the surface of the adsorption complex of the soil (mainly clay and humus colloids). Exchangeable ions can replace each other on this surface, and are also available to plants as nutrients. Although cations (e.g. calcium and magnesium) are the most common, exchanging at negatively charged sites, some anions (e.g. sulphate and phosphate) do exchange at positively charged sites. See anion-exchange capacity and cation-exchange capacity.
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Cite this article
MICHAEL ALLABY. "exchangeable ions." A Dictionary of Ecology. 2004. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "exchangeable ions." A Dictionary of Ecology. 2004. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O14-exchangeableions.html MICHAEL ALLABY. "exchangeable ions." A Dictionary of Ecology. 2004. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-exchangeableions.html |
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