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[Gene GeRue <genegerue AT ruralize.com>]

I wrote:

If in fact this is what he is saying, then he needs to provide the  
scientific research that supports his numbers. He postulates twenty  
percent organic matter in soil. I have been an organic enthusiast for  
decades and I have never seen anyone suggest such a number is feasible.

To check myself, I did a search and found this table of percentages of  
organic matter in various soils:

Table 1. Organic matter in native and cultivated soils (per cent)

Soil zone       
Virgin
Cultivated
Brown   3-4     2-3
Dark Brown      4-5     3-4
Black   6-10    4-6
Dark Gray       4-5     2-3
Gray    1-2     1-2


http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agdex890?opendocument
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From: Gene GeRue <genegerue AT ruralize.com>
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Subject: Re: [Homestead] Allan J. Yeomans' carbon sequestration theory
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And here is a single page that with few words and a few illustrations  
make the point. The site also provides links to two field trials, in  
West Africa and Central Asia.

http://edcintl.cr.usgs.gov/carbonoverview.html