I will attempt to answer these questions.
Soil biology is very important for soil health and nutrient cycling. You mentioned some of the specific biological components. They basically help plants to grow, capture nutrients and hold water.
As part of the soil health research, we're currently focusing a lot on soil biology. A lot of efforts have been placed in genomics, as well in finding out specific biological components that are critical to the agroecosystem for resilience and sustainability.
This research is not done on its own. It's part of the entire soil health effort, which is made up of the biological component, the physical component and the chemical aspects of soil. Not all of the efforts are going to be placed in soil biology, but in recent years, more effort has been placed because of new technology that has been developed to be able to better understand and identify various beneficial micro-organisms in the soil.