Re: [compost_tea] Re: Soil Sampling

From: Robert Norsen <bnbrew_at_yahoo.com>
Date: Thu, 21 Aug 2003 14:50:40 -0700 (PDT)

Two actions to reduce the problem and one SWAG. :
 
1) Use less food in the brew, less late in the cycle, run the brew longer after the last feeding. If you can run the guys out of food they will slow down and use O2 at a lower rate.
 
2) USe aeration in every part of the cycle including the application tank.
 
3) At the end of the cycle anaerobes have been eaten by aerobes? Aerobes will survive in low O2 for a short time or will go dormant but recover when back in the air. Applies to bacteria and to fungi? Is this right Elaine ?

dloring3 <dloring3_at_cox.net> wrote:
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_at_yahoogroups.com, "John Dunbar" <jdunbar_at_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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Received on Thu Aug 21 2003 - 19:09:45 EDT

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