“Many of you might be wondering “Why would I want to mix cob with a tractor?” There are other good methods of mixing cob with your feet, using a tarp, or in a pit that don’t require the burning of fossil fuels. This is true, and any method of mixing cob without heavy machinery is going to be the purest form of cob mixing with the lowest amount of embodied energy.
rototiller cob
Rototiller Cob
There are hundreds of uses for cob, so this technique is something good to learn about even if you’re not going to build a cob house.