Troll here... Might anyone have independent lab data that shows side by side yield results? There seem to be as many articles supporting it as opposing it. My perspective is that unless there's a soil deficiency, I (offhand) question the improvement foliar brings. It would be interesting to see a study looking at plants in a fantastic soil / root environment subjected to foliar treatments and measuring improvement. It's easy to "see improvements" as a grower, but such things don't necessarily translate to fact. Like audiophiles swooning over $1000 speaker cables. They are experts, sure, but when the cables are tested in double blind tests... the experts can detct no difference. Not at all saying this is the case with foliar.