MATERIALS AND METHODS
Livestock population
Livestock population data were obtained from the
Korean Statistical Information Service for each year from
2005 to 2014 to estimate the emissions of CH4, CO2 and
N2O from pig and poultry farming (KOSIS, 2015). The pigs
were divided into three categories (nursery to finishing pigs,
gestating to lactating sows and boars) and the chickens were
divided into two categories (broilers and layers).