White, solid, microprilled urea; it is an organic amide molecule containing 46% nitrogen in the form of amine groups. It is highly water-soluble and safe to handle. It is used as a foliar fertilizer for all crops, specifically for leaf crops that are sensitive to biuret; it contains no more than 0.5%. Bulk density is 44 to 48 lb/ft3. pH is 8.5–9.5. Urea Microprilled may be considered as a slow release fertilizer; it must be decomposed by microorganisms before it can be assimilated by plants.