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1. Water soluble powder
2. Urea: 46%
3. Molecular formula: CH4N2O
4. Molecular weight: 60.06g
5. Melting point: 132-135 degrees C
6. Relative density: 1.335g/mL at 25 degrees C (lit)
7. Commodity: prilled urea
a. Nitrogen: 46.0% minimum
b. Biuret: 1.0% maximum
c. Moisture: 0.5% maximum
d. Particle size: 0.85-2.80mm, 90% minimum
8. Commodity: granular urea
a. Nitrogen: 46.0% minimum
b. Biuret: 1.0% maximum
c. Moisture: 0.5% maximum
d. Particle size: 2.7-4.75mm, 90% minimum
8. Appearance: white, free flowing, free from harmful
substances and foreign matters
9. Packing: in 50kg PE bag or 1T big bag |
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Urea
This type of fertilizer usually is available to the public in a
white, crystalline, organic form. It is a highly concentrated
nitrogenous fertilizer and fairly hygroscopic. This also means that
this fertilizer can be quite difficult to apply. Urea is also
produced in granular or pellet forms and is coated with a
non-hygroscopic inert material. It is highly soluble in water and
therefore, subject to rapid leaching. It is, however, quick-acting
and produces quick results. When applied to the soil, its nitrogen
is rapidly changed into ammonia. Similar to ammonium nitrate, urea
supplies nothing but nitrogen and the application of Urea as
fertilizer can be done at sowing time or as a top-dressing, but
should not be allowed to come into contact with the seed.
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