How are compost bins used?

To break down carbon- and nitrogen-rich compostables and to store finished compost are ways in which compost bins are used. Compost bins may be made of metal, plastic or wood, with holes or mesh for proper aeration. They need to be located conveniently for layering and moisturizing in the process of composting and for retrieving once the end-product becomes available for amending, fertilizing, or mulching soil.