[Cob] Soil Survey

[yewberry at wavecable.com]

"Janet Standeford" wrote:

>Now can somebody tell me what 
>that means regarding the making of 
>cob? I understand I must add sand straw 
>and water but how does this much silt 
>fit into the formula? Is it possible to 
>remove silt?

A high percentage of silt (I'm pretty sure 30% constitutes 
"high") will greatly weaken your cob mixture.  I don't 
know of any real way to remove silt from a large amount of 
soil.  Better to find another source, I'm guessin'.

Thanks for the link though.  As I've always suspected, 
there's absolutely no clay anywhere near our place.

Brina