Figure 2

Effects of feeding mixed phytoncide essential oil and soybean oil to dairy cows for 35 days on methane gas (CH4). Values are expressed as the mean of methane production from all cows in each treatment.
Effects of feeding mixed phytoncide essential oil and soybean oil to dairy cows for 35 days on methane gas (CH4). Values are expressed as the mean of methane production from all cows in each treatment.