Composting is critical for soil fertility
The organic farmer has to be thinking about how to built soil fertility, soil structure and soil life or its’ web of life. The plants in your garden need more than just Nitrogen, Phosphate and Potash, it needs other major elements such as calcium, magnesium, sulphur, and up to 64 different trace elements. Well matured compost which is teeming with microorganisms can transform nutrients and search for others by using a network of tread like hypha.
I came across this well illustrated video on composting.