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Re: [compost_tea] Re: Soil Sampling



Yopu're right John, for a proper test you have to account for the action of the water alone.
 
Dave
----- Original Message -----
Sent: Thursday, August 21, 2003 7:38 PM
Subject: RE: [compost_tea] Re: Soil Sampling

Thanks David, this is the kind of reply I was looking for.  If your observations and my paranoia are correct, then its important to maintain aeration during the application, as Robert Norsen points out in a later post.
 
Also, what is your take on my other fear... that if you (or mother nature) applies 100 units of water during the test period, and then you drench with 10 units of water (in the ACT, maybe over several times), then how can you separate out (or explain) the effect of extra water from the ACT drenches without a separate test plot?
 
Thanks,
 
John Dunbar
Texas
-----Original Message-----
From: dloring3 [mailto:dloring3@cox.net]
Sent: Thursday, August 21, 2003 3:21 PM
To: compost_tea@yahoogroups.com
Subject: [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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