[Terrapreta] Press release: limitations on charcoal as a carbonsink

[Ron Larson]

Andrew, et al

Everything you wrote below chiding me is correct.  I should hav ebeen more clear about referring to the press release, and not the Wardle article.  I also should have clarified that I was thinking poor CO2 absorption, whereas I talked about C release in this point #4.  you cite below.

See more below in Bold.


----- Original Message ----- 
From: "andrew" <list at sylva.icuklive.co.uk>
To: <terrapreta at bioenergylists.org>
Sent: Monday, May 05, 2008 3:44 AM
Subject: Re: [Terrapreta] Press release: limitations on charcoal as a carbonsink


On Saturday 03 May 2008 18:23, Ron Larson wrote:
> 4. The results are explained below - the biochar accelerated,
> rather than retarded C release - which I didn't want to hear.

I cannot see why you didn't want to hear this one, it didn't say the 
char was respired in any way did it?   [RWL:  Nope.]

If not it simply demonstrates 
that the char increases microbial activity doesn't it?   [RWL:  Yup.]

Okay so the 
time constant of decay of humus shortens its life in the soil but 
many tropical soils do this, the trade off might be that it's 
necessary to maintain active growth with a continuous cover system??
[RWL:  Yup.]

AJH (not a gardener)
[RWL:   I have visited Andrew in the UK - and have great admiration for what he knows, especially about making charcoal.  I'll bet he knows a lot more about gardening than most on this list - especially me. 
    Andrew is the main list coordinator for "stoves" - where we have heard a lot about his perceived need for the UK to do more thinning of its forests - and subsidizing this with char production.   
    Thank you Andrew - especially for your work in developing novel large scale charcoal makers.   Maybe the world will soon be ready for your inventions.    Ron
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