Variables of a) abiotic soil properties, b) soil biota abundance/biomass/concentration and c) soil biota diversity, measurement unit, data range and method.

Soils are classified according to [44], for further details see material and methods or supporting information S1.Classification of groups for follow-up models after obtaining a significant overall model for the relationship between abiotic soil properties and soil biota abundance:1bacteri.2total biomass of saprotrophic fungi.3arbuscular mycorrhizal fungi.4yeasts.5soil fauna or diversity.6yeasts.7extracellular proteins.8soil fauna.Abbreviations: Acidobact. = Acidobacteria, bact. = bacteria, tot. = total.