I have been reading a lot about the soil food web and how plants get nutrients. I was wondering in a container how all the nutrients are made available to the plant sense it doesn't really have a soil food web like in a garden. How does a natural fertilizer get broken down so the plant can use it? I have some potting soil with alfalfa meal, feather meal, kelp meal, worm castings and mycorrhizae. I know the mycorrhizae will some of the work at least. But they weren't in the soil mix how would the nutrients get processed?