Vermiculture: The Art & Science of Home-Composting. Registration now open Decomposition is the breaking-down of organic matter into a nutrient-rich form that can be used by plants and animals. Learn how moisture, air, temperature & light affect the process of decomposition while making your own earthworm bin. Add earthworms to watch how their daily activities of eating, moving-about & excavating play a major role in breaking down organic matter. This workshop is sponsored by a Mansfield Twp. Recycling Grant.