Manure is a good source of plant nutrients and organic matter. Properly managed manure applications recycle nutrients to crops improve soil quality and protect water quality. Manure is highly variable source to source, and growers must be able to understand and reduce that variability to make best agronomic and environmental use of manure. Fertilizing with manure out lines a systematic method to help you manage nutrients from manures. Even with the best methods there is still some degree of uncertainty when using manures as nutrient sources.