Manure N mineralization in soil determines manure N availability for crop uptake. In this study we evaluated the N mineralization of dairy manure components (feces, urine and bedding) in soils under different environmental conditions. Soil texture and other controls, such as moisture and temperature, create environments where great differences in manure N mineralization are anticipated to occur. Understanding the influence of these factors under field conditions is crucial to better predicting the amount and rate of how manure N becomes available to agronomic crops.