From Havlin, Beaton, Tisdale and
Ammonium Nitrate NH4NO3
Fertilizer-grade NH4NO3 contains between 33
and 34% N and is a more popular fertilizer in Europe than in North
America. In 1995 about 1.7 million metric tons of NH4NO3
were used in the United States. The N03- and NH4+
components of NH4NO3 are readily available to
crops, and thus this N fertilizer is widely used in cropping situations
in which growing crops are topdressed with N. NH4NO3
has some disadvantages, which include
I .Very hygroscopic; care must be taken
to prevent caking and physical deterioration in storage and handling.
2. High risk of fire or even explosions
unless suitable precautions are taken; intimate contact with oxidizable
forms of C such as fuel oil produces an explosive mixture that is widely
used as a blasting agent.
3. Less effective for flooded rice than
urea or NH4+ fertilizers
4. More prone to leaching and
denitrification than NH4+ products.