[Terrapreta] Nutrient adsorbtion by fresh charcoal

[Richard Haard]

Hello Folke

In a few weeks I will be taking soil analysis of a set of charcoal  
treatments I set up earlier this spring. I have two types of charcoal  
and permutations with compost, fertilizer, controls in 28 plots  
approximately 14 feet long each.

So far the charcoal and treatments have been in place for 2 months.  
The soil tests should tell us something about this question. Will  
probably have a report for us by end of July.

Best Wishes

Rich Haard


On Jun 16, 2007, at 6:41 PM, Tom Miles wrote:

> This is an important question that we have not discussed completely  
> on the list. It was posted to the Terra Preta website by Folke  
> Gunther who is now on the list. Tom Miles
>
> ------------
>
> Nutrient adsorption by fresh charcoal
>
> Submitted by Folkeg on Sat, 2007-04-21 08:33.
>
> As I understand it, adding fresh charcoal to the soil would have an  
> initial effect of removing nutrients from the soil. After the sites  
> are fillded up, the typical 'Terra Preta' effect would add on.
> Adding nutrients to the char previous to the addition to soil would  
> reduce/reverse this initial effect.
> For example, adding urine.
> Does anybody have any idea of the specific adsorption capacity for  
> charcoal on nutrients?
>
> ------------------------------
> Folke Günther
> Lund, Sweden
> www.holon.se/folke
>
>
>
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