Yeah that KIS organics article was just a basic outline… of you go tjrough the site and podcasts you’ll find a lot more info.
Those minerals you mentioned are not clay… no.
Clay is not really scratched on in most soil recipes but it makes a great difference adding it in. Ive been building soils for a long time and stumbled across a talk on the importance of clay in soils so started adding it to my mix. Best thing ive ever done for my soil mate
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