While scientific data would be cool to have, given our science-based mindsets, it is a fact that we humans still do not understand how nature works.
One of these mysteries is how plants even take up nutrients. Yes, there are different theories, but we don't really
know...
The dominant one is that it's a chemical process (which is used to legitimize the use of fertilizers, how that came to be being a whole story on its own). Then there are those who believe plants actually not only interact with microbial soil life, but actually feed off them - a process the eccentric Danish Herwig Pommeresche describes with nods to many other scientists, amongst them Raoul Heinrich Francé. Here's a 2010 study in English
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2912860/
Crazy shit
Oh and talking of crazy shit, there is a farm near Bodensee in the very south of Germany where the main input they give their plants is energy and ashes (as topdress as well as foliars) from an ancient Vedic fire ceremony, called Agnihotra, which is performed daily at sunrise and sunset.
The group has been farming that land for over 25 years - when they bought it, farmers in the surroundings were saying, "well good luck with that, those fields haven't yielded in ages", the fruit trees - too old, barely any produce... and in just one season the apple trees gave up incredible harvests (I forget the numbers, but the guys doing this kept records, solid evidence to back what otherwise could be deemed superstitious nonsense).
I was there, saw and TASTED their incredible veggies (enormous, juicy carrots with a taste so sweet and rounded it was amazing, yum).
So, there are many other levels of existence, of flourishing, that we just barely perceive to exist - a great read is
The Secret Life of Plants by Peter Tompkins and Christopher Bard which explores different approaches to handling plants (including Agnihotra & Steiner's biodynamic agriculture**) and recent research into the nature of plants, their sensitivity to sound, whether they have ESP... weird in part, yes! but highly interesting, if only to show that there are dimensions we are hardly aware of that add in to whatever observations we make on the purely material level (i.e., which nutes should I add, or which microorganisms should I have in the soil, how much THC, terpenes, CBD...a plant has).
End of the day, the brain acrobatics are great and entertaining, but what we need most, and I mean all of us humans, is to redevelop our intuition and common sense.
What a rant lmao
**edit: actually those methods are described in their other book,
Secrets of the Soil