I know this question wasn't for me, but I'm hoping for feedback as well.
I use 1., 2., 3., and 5. I don't know anything about the other stuff.
There are scientific papers and university studies stating the benefits of 1,2,3 and 5. 5, IMO, is only beneficial in organic growing. If you're using it in petroleum based products you are wasting your time and money as the mycos don't do well when mixed.
Silica helps protect your plant from a lot of problems. Heat, drought, disease, etc.
Kelp... I don't really know what the deal is with kelp, but I know it is used by quite a few agricultural universities... so that is good enough for me.
Humic acids are also beneficial especially if using a soilless medium. Humic acid is found in composted materials and is great for root development and ORGANIC nutrient uptake. I'm still unfamiliar with the last two, kelp and humic acid, so if I've given any incorrect information, I hope someone will correct me.
You can always google these and you will easily find pdfs published by universities.
Sir Ganga "Pretty hard flushing a field...IMO...My granddaddy said flyin is for the birds "retard".....Some peoples kids!"
I normally don't respond to personal insults, but lets leave the family out of it. I was merely making the point that a lot of what I've been taught has come from AT LEAST three generations of farming families. My grandfather is 84 years old and was walking behind a mule when he a kid. I tend to trust most of what he says as 70+ years of agricultural experience speaks for itself. Next time you eat a Mariani Sun-Dried tomato or Blueberries; there is a good chance you are eating something I've grown.
And in regards to flushing a field. We had an inlet from a nearby pond/river and could easily have "flushed" the plants if they wanted; so it can be done. It's called flood irrigation, lol.