tl;dr: y'a encore du taf en pédologie :)https://www.nature.com/articles/nrmicro.2017.87

Embracing the unknown: disentangling the complexities of the soil microbiome - Nature Reviews Microbiology
Soil contains a vast diversity of microorganisms that can directly or indirectly modulate soil processes and terrestrial ecosystems. In this Review, Fierer summarizes the challenges in characterizing the composition and functions of the soil microbiome, and discusses key future research directions.