I want to know the answer to the following question:
What was the first scientific study of how earthworms help soil?
All the background I'm provided with is that "The burrowers loosen the soil so that oxygen and water can penetrate it, and both surface and burrowing worms help to produce soil by mixing organic and mineral matter, by accelerating the decomposition of organic matter and thus making it more quickly available to other organisms, and by concentrating minerals and converting them to forms that plants can use more easily.". Is that enough to answer the question?
Answer: no