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EC number: 200-315-5
CAS number: 57-13-6
Fertilized plots (planted with Jasminum
grandiflorum) with 357 kg urea/ha recorded the higher abundance of
Collembola and mites than the controls.
NOEC field studies > 640 mg/kg dw
(collembola, mites, acari and bees)
Several long-term field studies demonstrates
that terrestrial arthropods are not sensitive to urea, i.e., the highest
application rates had no adverse effect on this organism group.
investigated groups were collembola, mites, acari and bees.
The highest application rate was 960 kg
urea/ha corresponding to 640 mg/kg dw assuming that the upper 10 cm were
treated since the studies were performed mainly in forests or during the
growing season and hence, soil turn-over is unlikely. However, even if
it is - more conservatively - assumed that urea has been distributed
within the upper 20 cm, this would correspond to 320 mg/kg dw which
indicates that these taxonomic groups are less sensitive than
earthworms. Hence, from the regulatory aspect this group if less
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