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Large-scale vermicomposting is practiced in various countries around the world: the United States, Canada, Japan, the Philippines, Italy. The produced vermicompost is used in landscaping and agriculture or sold. Some vermicomposting farms even produce worms for fishing and/or vermicomposting at home. Two main methods are applied in large-scale vermicomposting. Some farms use windrow-based systems, where windrows serve as a bedding material for worms to live in, as well as a large bin to add organic material to. In such systems, windrows have no physical barriers to keep worms from escaping, however, they rarely escape because they have plenty of organic material to consume. Windrows are often put on a firm surface to protect the worms from dangerous predators. The second method in large-scale vermicomposting is the raised bed or flow-through system. In this system, the worms receive an inch of feeding material on top of the bed, and an inch of their castings is collected from below by hauling a breaker bar across a large mesh screen, which serves as the base of the bed. Since red worms dwell near the surface and always move in the direction of new food source, this flow-through system doesn't require separation of worms from their castings before vermicomposting is packaged. Flow-through systems are often used in areas with colder climate, since they are suitable to apply indoors.