There is also a role for microbes in soil, which is an active area of research. Here’s some science on it, as an example: https://ohioline.osu.edu/factsheet/SA

There is also a role for microbes in soil, which is an active area of research. Here’s some science on it, as an example: https://ohioline.osu.edu/factsheet/SAG-16 https://ohioline.osu.edu/factsheet/SAG-16 I would say that’s more than just chemistry, unless you mean chemistry in a sense that’s so general the statement becomes a tautology.