What is urea? Urea
is the
chief nitrogenous end product of the metabolic breakdown of
proteins in all mammals and some fishes. It occurs not
only in the urine of mammals but also in their blood, bile,
milk, and perspiration.
Urea is widely
used as a fertilizer, a feed supplement, and a starting
material in the manufacture of drugs and plastics. It is
a colorless substance existing in the crystalline form,
which melts at **2.7°C (**1° F) and decomposes even
before the Urea boiling point.
Urea
(*6% N). This is the
most concentrated solid nitrogen
fertiliser and it is marketed in
the prilled form. It is sometimes used for
aerial top-dressing. In the soil, urea changes
to ammonium carbonate which may temporarily
cause a harmful local high pH.
