Application of synthetic nitrogen (N) fertilizers is one of the major anthropogenic sources of N2O emission from agriculture soil. N2O, a potent greenhouse gas contributes to global warming and is involved in destruction of stratospheric ozone. According to recent national estimates, annual N2O emission is 253 Gg, rising with the rate of 3.2% per year. In annual budget of N2O emission agriculture activities account for more than 80%, including 60% from use of synthetic fertilizer, about 12% each from agriculture residue burning and indirect soil emissions and about 3% from manure management. Indications are that emission rates of N2O will increase substantially as agricultural production and fertilizer use responds to needs for increasing food supply. N2O emission increased by the application of fertilizers can be mitigated by agricultural management practices (Shalini Anand et al 2006).