anthropic horizon

anthropic horizon

anthropic horizon The surface horizon of a mineral soil which is produced by very long periods of cultivation and fertilization by humans. It is dark brown in colour, contains at least 1 per cent organic carbon, is relatively deep (more than 50 cm), has a base saturation of more than 50 per cent, and has more than 250 ppm P2O5 soluble in 1 per cent citric acid.

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MICHAEL ALLABY. "anthropic horizon." A Dictionary of Ecology. 2004. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "anthropic horizon." A Dictionary of Ecology. 2004. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O14-anthropichorizon.html

MICHAEL ALLABY. "anthropic horizon." A Dictionary of Ecology. 2004. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-anthropichorizon.html

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anthropic horizon

anthropic horizon The surface horizon of a mineral soil that is produced by very long periods of cultivation and fertilization by humans. It is dark brown in colour, contains at least 1 per cent organic carbon, is relatively deep (more than 50 cm), has a base saturation of more than 50 per cent, and has more than 250 ppm P2O5 soluble in 1 per cent citric acid.

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MICHAEL ALLABY. "anthropic horizon." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "anthropic horizon." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O7-anthropichorizon.html

MICHAEL ALLABY. "anthropic horizon." A Dictionary of Plant Sciences. 1998. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-anthropichorizon.html

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