The variability of living organisms in soil and the ecological complexes of which they are part; this includes taxonomic and functional diversity within species, between species and of ecosystems.
Adapted from: Jones, R.J.A. et al. (2008) Environmental Assessment of Soil for Monitoring Volume V: Procedures & Protocols. Luxembourg. Available at: https://doi.org/10.2788/94366.
Related term: Biodiversity.