Alfisher...... something else I didn't mention that would be worth researching and reading about if you've never done so is how soil can be dominated by bacteria is some situations and fungi in other scenarios....I'm trying to pull this from memory and a quick scan of a Google search but I'm thinking your old pasture fields that are being over run by grass may be dominated by fungi with little bacteria present. I'll let you read about it instead of typing a novel but this may be something you want to tweak to have better balance in those fields and promote other types of species to thrive.