Unlike traditional wood or bark mulches, our Terra Mulch has a finer texture and adds a high-end look to any landscape. Bark mulches by their nature tend to deplete soils of nitrogen and restrict gas exchange between soils and the atmosphere. Terra Mulch is composted horse bedding and manure that continually improves the soil over the long term. As it begins to break down, it enhances the soil with additional organic matter, robust microbial life, and long-term nutrients, specifically nitrogen in the organic form. There is also a soluble fraction of nitrogen that provides a boost to the plant in the short term.