Paddy field and irrigated lowland r

Paddy field and irrigated lowland rice production systems are
known to be significant sources of methane (CH4) and nitrous
oxide (N2O), which are two important trace gases contributing to
an observed increase of approximately 0.6–0.7 C in global surface
temperature during the last century (Trenberth et al., 2007). Water
management is one of the most important factors influencing CH4
emission from paddy field (Khalil and Shearer, 2006).