The objectives of this study were to measure methane emissions from liquid manure stored on two farms (farm A
and farm B) in eastern Canada and to evaluate the effect of various mitigation strategies on methane emissions. It was found that manure from farm B (manure B) emitted methane soon after it was loaded to the storage pilots at 10°C and 20°C. It produced twice as much methane at 20°C as at 10°C. Manure from farm A (manure A) produced 3% and 54% of the methane emitted by manure B at 10°C and 20°C, respectively, over the 370‐day monitoring period. Additionally, manure A produced methane after a lag phase of about 250 days at 20°C, which, on most farms, is longer than the storage period between land applications. The important difference between the two farms shows the large error that would arise from estimating methane production using a single emission factor for all farms within a region.