[Terrapreta] Publication list by topics

[chris braun]

Hello,

Does anybody know if there exists a list of all relevant scientific  
publications about biochar, but classified by topics (e.g. the ones  
about chemical properties of terrapreta, about carbon persistence in  
soils, etc.) ?

This is unfortunately not an ordering criteria on the biblio page of  
the terrapreta list ! (year / title / type / author)
http://terrapreta.bioenergylists.org/biblio

Thanks a lot for your help !

Sincerely yours,
Chris