The pedosphere (from Greek πέδον pedon `soil` or `earth` and σφαίρα sfaíra `sphere`) is the outermost layer of the Earth that is composed of soil and subject to soil formation processes. It exists at the interface of the lithosphere, atmosphere, hydrosphere and biosphere. The sum total of all the organisms, soils, water and air i...
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http://en.wikipedia.org/wiki/Pedosphere
pedosphere 1. That component of the biosphere comprising the soil and soil organisms. 2. That shell or layer of the earth in which soil-forming processes occur.
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http://www.wordinfo.info/words/index/info/view_unit/1590/2
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