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acid soil

A Dictionary of Plant Sciences | 1998 | | Copyright

acid soil A soil having a pH less than 7.0. Degrees of soil acidity are recognized. Soil is regarded as ‘very acid’ when the reaction is less than pH 5.0. The USDA lists five standard ranges of soil acidity (less than pH 4.5, extremely acid; 4.5–5.0, very strongly acid; 5.1–5.5, strongly acid; 5.6–6.0, medium acid; and 6.1–6.5, slightly acid). Surface soil horizons of acid brown earths have a reaction of pH 5.0 or less.

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MICHAEL ALLABY. "acid soil." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "acid soil." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O7-acidsoil.html

MICHAEL ALLABY. "acid soil." A Dictionary of Plant Sciences. 1998. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-acidsoil.html

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acid soil

A Dictionary of Ecology | 2004 | | Copyright

acid soil Soil that has a pH less than 7.0. Degrees of soil acidity are recognized. Soil is regarded as ‘very acid’ when the reaction is less than pH 5.0. The USDA lists five standard ranges of soil acidity (less than pH 4.5, extremely acid; 4.5–5.0, very strongly acid; 5.1–5.5, strongly acid; 5.6–6.0, medium acid; and 6.1–6.5 slightly acid). Surface soil horizons of acid brown earths have a reaction of pH 5.0 or less.

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MICHAEL ALLABY. "acid soil." A Dictionary of Ecology. 2004. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "acid soil." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O14-acidsoil.html

MICHAEL ALLABY. "acid soil." A Dictionary of Ecology. 2004. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-acidsoil.html

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acid soil

A Dictionary of Earth Sciences | 1999 | | Copyright

acid soil Soil having a pH less than 7.0. Degrees of soil acidity are recognized. Soil is regarded as ‘very acid’ when the reaction is less than pH 5.0. The USDA lists five standard ranges of soil acidity (less than pH 4.5, extremely acid; 4.5–5.0, very strongly acid; 5.1–5.5, strongly acid; 5.6–6.0, medium acid; and 6.1–6.5, slightly acid). Surface soil horizons of acid brown earths have a reaction of pH 5.0 or less.

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AILSA ALLABY and MICHAEL ALLABY. "acid soil." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "acid soil." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-acidsoil.html

AILSA ALLABY and MICHAEL ALLABY. "acid soil." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-acidsoil.html

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