Re: [compost_tea] Re: vinegar addition

From: <soilfoodweb_at_aol.com>
Date: Sun, 20 Jul 2003 17:04:22 -0400

At Soil Foodweb Inc, we have been doing work on how to adjust pH in the water for your tea brew.

3 teaspoons of citric acid to drop 100 gal of waterr one pH unti. Ferric citrate is what was used, but Tang should give about the same results, but remember, Tang also has some sugar (!) in it. In mid-summer, addition of sugar may get the bacteria growing fast. They may use up the oxygen in the water, and since temperature is high, there isn't much oxygen in the water to begin. So be careful.

In order to use vinegar, you would have to test to determine how much vinegar would drop the pH per unti volume of water.

If you know you have high water pH, just add citric acid to your spray tank to drop pH, before you add the tea? What's difficult about that?

Now, watering your plants with tap water high in pH, or in salt, might suggest that you need to get some good organic matter on the soil surface, so the salt or the excess OH ions are reacted before the water moves into the soil. If no OM, then humic or fulvic acids.

Again, testing would be a good idea to make sure how much humic or fulvic or OM would be needed to neutralize the base in the water.

Elaine Ingham
President, Soil Foodweb Inc.
SFI Corvallis, OR
SFI Port Jefferson, NY
SFI Lismore, NSW, Australia
SFI Hilversum, The Netherlands
SFI Cambridge, New Zealand
www.soilfoodweb.com

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Received on Mon Jul 21 2003 - 00:11:27 EDT

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