A Biological Compost Turner is a machine that helps to speed up the composting process of organic materials. It mixes and aerates the compost pile, which encourages the growth of beneficial bacteria and fungi that break down the organic matter. The turning action also helps to distribute moisture and heat more evenly throughout the pile, which further aids in decomposition. Biological compost turners can come in a variety of sizes and types, including manual, self-propelled, and tow-behind models. They are commonly used in agricultural and commercial composting operations, as well as by home gardeners who want to make their own compost.