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  • From: Gene GeRue <genegerue AT ruralize.com>
  • To: Homestead <homestead AT lists.ibiblio.org>
  • Subject: [Homestead] Allan J. Yeomans' carbon sequestration theory
  • Date: Thu, 31 Jan 2008 07:39:04 -0700

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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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



  • [Homestead] Allan J. Yeomans' carbon sequestration theory, Gene GeRue, 01/31/2008

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