Based on the chemical, physical and spatial heterogeneity of the soil as a habitat: What is the contribution of soil biota to the formation and stabilization of soil aggregates?

When is litter decomposition most favored by fungi or bacteria? Take into account the water / air ratio in the soil and the pH of the soil.

What is the role of biological nitrogen fixation and mycorrhiza for the availability of nitrogen and phosphorus in the soil, respectively?

What is the importance of the rhizosphere in the soil-plant system?