[Terrapreta] Soil ph

[Richard Haard]

Thank you Randy - Interesting research project

I do not know yet what effect the charcoals i will be using will  
effect my test soils. I will be conducting some tests just as you  
have done sometime next week. I am taking care to eliminate ash as  
even ash from pine needle char would be alkaline.

In your tests I would suggest that you determine if the pine needle  
char causes soil pH to change as soils have buffering properties.

My U Mass soil tests included pH and buffer pH. The buffer pH is a  
measure of the soil to resist pH change after lime is added or stored  
acidity. My soils have a pH of 6.6 and a buffer pH of 6.6 meaning it  
may resist change in pH with addition of the charcoal. So perhaps I  
may be able to get by without sulphur.

Rich H

On Apr 19, 2007, at 10:25 AM, Randy Black wrote:

> Rich, There are ways to reduce ph including sulphur. One way I am  
> looking at is using pine needle biochar. I do not have any field  
> results as of yet but the idea is:

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