But amendments would be different than organisms in my book. Recharging amendments is needed for sure, there’s a finite amount in a given volume of soil, and the plant will use it, and it won’t multiply on its own. The organisms multiply on their own…
Amendments would be things like kelp meal, worm castings, blood meal, guano, etc…
Organisms would be bacterias, myco, microbes - the little things living and multiplying in your soil