Composting is a natural process, The active ingredients are waste material (usually vegetation), together with a nitrogen-rich biosolid (manure or food-waste), and the microbes that exist naturally in these materials. Over a period of several weeks, these materials should be mixed or turned in order to keep the microbes alive, and to introduce fresh oxygen into the pile or windrow. Oxygen is the key to producing odor-free compost of top quality. The period of time from start to finish will depend on the type of material used and the average particle size. Turning with a Frontier Windrow Turner not only results in 100% mixing and aeration, but also has a positive effect on the reduction of particle size.