Earthworms play a crucial role in turning organic waste into nutrient-rich manure through vermicomposting. They break down waste quickly by grinding it in their gizzards, creating vermicast that is beneficial for plants. Vermicompost contains microorganisms, minerals, and organic matter that plants can easily absorb. Research shows that vermicompost made from different organic materials, like tree leaves mixed with municipal waste, is highly valuable for horticultural purposes.