Check out nova crop control outta the Netherlands for more info on their sap testing and benefits. NA samples get shipped to them, which seems lame, but doesnt affect the science behind sap analysis. The more info the better, what we do or dont do with that info is the key part.
I assume they are micronizing all particles that are not readily water soluble. A coffee grinder is good but cant be compared to a industrial type micronization process.
Now you are getting why I said it was a joke. The farmer in the video said that AEA was the only one which did sap analysis.
BTW I thought this sap analysis was something one could do themselves, rather than sending samples to Netherlands. Smells like sending compost tea to a lab for analysis, which we should all know by now is 100% bogus.