Urea(46-0-0) usually has the lowest cost per pound of nitrogencompared to other single-element nitrogen fertilizers. however,urea undergoes unique chemical transformations when field appliedand severe losses in efficiency may result if special managementpractices are not followed. The purpose of this fact sheet is tobriefly describe urea transformations and to suggest how urea-Nmay be conserved with proper management in thefield.

Fertilizer urea can be purchased as prills or as a granulatedmaterial. in the past, it was usually produced by dropping liquidurea from a " prilling tower" while drying the product. theprills formed a smaller and softer substance than other materialscommonly used in fertilizer blends. Today, though, considerableurea is manufactured as granules. Granules are larger, harder,and more resistant to moisture. As a result, granulated urea hasbecome a more suitable material for fertilizerblends.

NITROGEN: 46% MINIMUM

MOISTURE: 0.3% MAX

FREE AMMONIA: 160 PXT PPM MAXIMUM

BIURET: 1% MAXIMUM

HARMFUL SUBSTANCES: 100% FREE from HARMFULSUBSTANCES

MELTING POINT: 132 DEGREES CELSIUS

GRANULATION: 1-4 MM 94% MINIMUM

COLOUR: PURE WHITE

PRILLED: FREE FLOWING, TREATED against CAKING