growing material ( composite made out of rice hull, etc.)

http://challenge.bfi.org/application_summary/458

Information about rice straw medium for mushroom

After I read David's mushroom post, I remembered I read that rice straw is used as a culture medium for mushroom.

In 70's they made a bundle of rice straw and steamed it to remove bacteria and then use it as a source for the spore.

Now they mix it with rice bran( inner skin than rice hull) and poultry wast and ferment. the ratio is rice straw 100 : poultry waste 10 : rice bran 5 (or don't put rice bran) : urea 1.5 : plaster 1 

there are more detailed process but this is a brief summary. 

Since the mushroom cultivation is fast profit, using rice straw as a medium for mushroom seems have some possibility.

Material culture of Costa Rica

precedent study of Kickstart-Moneymaker