There is some post about that in this section:

http://boards.cannabis.com/organic-g...st-recipe.html
http://boards.cannabis.com/organic-g...pe-please.html
http://boards.cannabis.com/organic-g...-comments.html

Just make a search in the organic section with compost, recipe or any other key word like that, you should get all the info you need. Worst case just send you you're recipe and I'm quite sure someone will comment and suggest for a better mix.