Re: [compost_tea] The microbiology of soil and of nutrient cycling

From: Robert Norsen <bnbrew_at_yahoo.com>
Date: Thu, 23 Dec 2004 18:20:21 -0800 (PST)

good intersting informative post, Tom, thanks Bob

Thomas Jaszewski <tom_at_livesoil.com> wrote:
  

I found this great primer this AM. Very readable…..

 

http://assets.cambridge.org/052162/1119/excerpt/0521621119_excerpt.pdf

 

“Microscopic examination of soil reveals vast numbers of bacteria are

present. Typically there are about 108 to 109 per gram dry weight of soil. Only

a tiny fraction of these can be cultivated upon laboratory culture media.

Scientists have yet to provide appropriate culture conditions for the vast

majority of soil microbes. Many live in complex communities in which individuals

cross-feed one another in a manner that cannot be replicated when the

microbes are placed in arti.cial culture. The microbial activity of soil is

severely underestimated using arti.cial culture. An estimate of the microbial

activity of soil is further in.uenced by the fact that many soil bacteria and

fungi are present as dormant spores. These may germinate when brought into

contact with a rich arti.cial growth medium.”

 

 

Tom Jaszewski
 
tom_at_livesoil.com
702-595-7012

"People who say it cannot be done,
should not interrupt those who are doing it".
George Bernard Shaw (1856-1950)


 



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Received on Fri Dec 24 2004 - 06:08:52 EST

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