Hey Rrog, I did see this one on ecto. Not sure I'm sold on the description, but seems possible.
http://link.springer.com/article/10.1007/s00572-008-0176-3
I've seen on this site and others that the spores don't really float around. Not sure it would be possible to multiply these in a BIM, but I'm often wrong.
http://www.biotechnica.co.uk/bioagronomy/science/mycorrhizae
Mycorrhizae are not spread by airborne spores, and when they have been depleted or destroyed they cannot return unless they are purposely replaced. Regular soil disturbance together with the widespread use of fungicides, herbicides and other chemical inputs has reduced mycorrhizal populations in agricultural soils significantly.
Either way not trying to call anyone out, I didn't realize they were airbourne at all.
Hey Joe (makes me want to play some Jimmy lol)! Personally, I like to add a mycorrhizal innoculant. Everyone places their own value on things. For me, I don't think twice about spending $25 on an innoculant that lasts me 6-8 months easy. I also don't have a wife and kids. So I agree, to me I see value, but again, not trying to call anyone out per say. I'm also curious if we can culture PNSB in a BIM. I read in one book this was a reason to buy em-1 instead of making your own, but I'm still looking for other sources.
On the topic of simplification per Stow, I have pretty much cut out ful-power and coconut powder out of my regimes. I do still like to bubble some ewc and a weekly sst. Just how I do it.
Peace!
P-