Nitrogen fertilizer management strategies for rice production in Bangladesh

Various ways of increasing nitrogen (n) fertilizer use efficiency in rice culture has been evaluated by conducting field experiments at bangladesh rice research institute (brri). nitrogen fertilizer use efficiency in rice culture can be increased by root-zone application of modified forms of urea like urea large granule (ulg) and urea super granule (usg). the efficiency of urea-n can be increased to some extent even by injection of the conventional prilled urea (pu) into the root-zone of the rice plant by the instrument pneumatic urea injector. application of sulphur (s) along with n increases n use efficiency in rice culture in s deficient soils. modern rice varieties having relatively taller plant stature can exploit more soil n for grain production compared to short statured varieties. different varieties require different amounts of n for maximum grain yield and it is important to note it to avoid indiscriminate application of a single n rate for all the varieties.