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RE: [compost_tea] The usage of CaO
Title: Message
Thanks, Elain: The osmotic aspect did not occur to me. 
I would think that what the usual practice here of using CaCN2 or CaO to 
sterilize the soil is mostly the osmotic effect instead of the supposed 
(high) temperature as what people has been thinking.
 
 
Regards 
TaChung Huang 
  
  the concentration of Ca oxide 
  (this is a salt, it has osmotic effects, that is what will kill the microbes) 
  would be the important thing.  The best way to know for certain is to 
  look at a drop of the tea before adding the salt, and then look at anohter 
  drop after adding the material.
OK?
Elaine Ingham
President, 
  Soil Foodweb Inc.
www.soilfoodweb.com
SFI Oregon, USA
SFI 
  Australia
SFI New York
SFI Europe
SFI New Zealand
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