What Fertilizers Contain Urea?

The characteristics of a blended fertilizer will pool the properties of all its component ingredients. In the case of urea containing blends, if less than 30% of the nitrogen in the mixture comes from urea, this level of urea is sufficiently small so that it will not seriously influence the properties of the final product. In other words, if a fertilizer contains less than approximately 30% of its nitrogen from urea, it need NOT be considered a urea blend. Such a mixture should not be included in discussions on special management techniques required when using urea blended fertilizers. The major source of phosphorus used in fertilizer blends on Prince Edward Island is diammonium phosphate (DAP) which has a fertilizer analysis of 18-46-0. It should be noted, therefore, that DAP has an N:P ratio of 1.0:2.6.This means that fertilizer blends, having an N:P ratio close to 1:2 will contain little urea because the DAP supplies almost all the nitrogen required in the blend. In order to ...  more