View source for File:Mud brick 15 bentonite sand straw sawdust 111223.jpg

Part of a mud brick made from sand, straw, saw dust and 15 % bentonite.
Bentonite, a type of clay, can be added to compost or directly to the soil. It helps building up the clay-humus complex to enhance the fertility of a soil.

== Licensing ==
I've put this photo in the [http://commons.wikimedia.org/wiki/Public_domain#Material_in_the_public_domain public domain]. You can use it, but i would appreciate when you add a link to this page or to Eagle Rock Wiki. --[[User:John|John Eagles]] 01:45, 24 December 2011 (PST)

[[Category:Gardening photos]]
[[Category:Photos by John Eagles]]