Ibechillin
Masochist Educator
Microbes and fungi are not controlled by the roots, the roots simply influence them intermittently with exudates depending on what is lacking in the soil solution. The insoluble elements contained in the medium are constantly being made available in soil solution to the plant even when not needed, this can cause nutrient toxicities and deficiencies due to how elements antagonize uptake but may not be perceivable to the eye immediately. Slownickel has explained this is why heavy metals will be taken up by plants outside of the PH availability range and why he advises not using Azomite.