[Terrapreta] manure biochar N-P-K question

[Adriana Downie]

Hi James,
 
It very much depends on the temperature and processing conditions.
Generally the P and K will stay with the char, you will loose some
nitrogen but if you keep the temperature below 400C you will keep a
significant amount of it. The availability of the NPK in the char also
changes significantly with process conditions. 
 
Regards,
 
Adriana Downie
BEST Energies Australia
 
-----Original Message-----
From: James Oliver [mailto:jwogdn at yahoo.com] 
Sent: Monday, 10 September 2007 11:16 PM
To: terrapreta at bioenergylists.org
Subject: [Terrapreta] manure biochar N-P-K question
 
I have seen discussion of turning manure into biochar.  Is the N-P-K
retained in the biochar if manure is used as feed stock?  
 
JW
 
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