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Type of soil

 
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Location: Ilha Terceira, Azores
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Hi, im new here.

I want to build with cob but where i live our soil is andosol, meaning: is one of the stages of the creation of soil of volcanic origin, which
typically occurs 200 years after a volcanic eruption. I live on a island, in portugal.. do you think my soil with be good for cob? how can i see that?
 
steward
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Welcome to permies, Vasco. I don't know about your soil specifically, but a good place to start would be with a mason jar soil test to just see your soil composition is.

 
Vasco Vieira
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Dave Burton wrote:Welcome to permies, Vasco. I don't know about your soil specifically, but a good place to start would be with a mason jar soil test to just see your soil composition is.



So i found this photos i did a few weeks ago, i was trying to identify the layers but i think i failed.. what you think?
IMG_20170401_092816_1.jpg
[Thumbnail for IMG_20170401_092816_1.jpg]
IMG_20170417_001515.jpg
[Thumbnail for IMG_20170417_001515.jpg]
 
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That jar test shows that your soil is almost all sand (differing sizes but just a very thin layer of silt/clay on top)
You would need to have a way to add clay to that soil profile to be able to make good cob.
 
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