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[compost_tea] Re: Soil Sampling



If it takes even 10 minutes for you to apply an active fresh tea to 
your garden most of the Oxygen has been consumed by the bacteria.  
I've measured many teas after brewing and watched the O2 meter drop 
from 7+ppm to almost zero in less than 10 minutes.  There just isn't 
much Oxygen in water, that's why we have to keep adding it so fast.  
Not to say that the bacteria and fungi are dying because the Oxygen 
is gone but they definitely eat it up fast, so, in my mind there is 
no need for a "Oxygenated water" control in your test.

Dave

--- In compost_tea@yahoogroups.com, "John Dunbar" <jdunbar@d...> 
wrote:
> In regards to testing, I  would like to know if there should be 3 
different
> controls to compare against ACT: 1) No application, 2) Water only, 
3)
> Aerated Water.
> 
> I was thinking that Aerated Water may give ACT a run for its money 
if the
> application is a drench and the soils are not aerated properly.
> 
> Any comments?
> 
> It would be terrible if the big effect from ACT came from O2.
> 
> Also, I ordered Paul Sachs' book ("Edaphos: Dynamics of a Natural 
Soil
> System") and it is truly great.  I'll be giving it a 5 star review 
after I
> finish reading more of it.  Right now I'm skipping around in it.  
Its a 200
> page paper back with lots of information.  Its easy to read, yet at 
the same
> time it contains so much information.  Every page is underlined 
heavily.
> 
> John Dunbar
> Texas


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