Fortifications: Why walls of stone and not of earth?

[Tarbicus]

Interesting page here:
[url:1jkao4sb]http://www.consumerenergycenter.org/home/construction/earth.html[/url]

Unfortunately, rammed earth construction is very labor intensive. It can take many hours to properly tamp dirt into the forms, then take the forms down and set them up again for the next section of a wall. This laborious process makes rammed earth construction more expensive than traditional frame and stucco building, and most of the homes currently built in this way are custom homes.