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Re: [compost_tea] Copper and CT



So sulfur applied to the soil, either in granular or wettable form is harmful to the fungi in the soil? Sulfur is used in many lawn applications to open the soil, lower the pH, and chelate some nutrients. Is sulfur helpful to the lawn, partially, because it gives the bacteria the upperhand over the fungi population? What does this do to the biology, or fungi, necessary for the trees growing in the lawn?
Steve Bridges
Kimas Tejas Nursery
----- Original Message -----
Sent: Monday, July 28, 2003 12:38 AM
Subject: Re: [compost_tea] Copper and CT

Reports in the scienitific literature say copper is toxic to a number of bacteria at 3 ppm.  As far as I have been able to discern, it is the bacteria that are more susceptible to copper than the fungi.  But we have not done testing on copper concentrations in tea, mostly because I am happy with the research papers on copper toxicity.

It's the sulfur that seems to take out many of the beneficial fungi.  We have some observation of this, but also a fair number of research literature papers showing the same thing.

Elaine Ingham
President, Soil Foodweb Inc.
www.soilfoodweb.com
SFI Oregon, USA
SFI Australia
SFI New York
SFI Europe
SFI New Zealand

"Hope is not a feeling. It is not the belief that things will turn out well, but the conviction that what we are doing makes sense, no matter how things turn out."   --  Vaclav Havel, former President of the Czech Republic



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