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
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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