R. Prasad et al., Coating of prilled urea with neem (Azadirachta indica Juss) oil for efficient nitrogen use in rice, NATURWISSEN, 86(11), 1999, pp. 538-539
A field study made with rice at the Indian Agricultural Research Institute,
New Delhi, showed that coating urea with neem oil, neem cake or neem oil m
icroemulsion improved rice growth and resulted in more grain and straw than
did commercial prilled urea.