
The measurement of CH4 yields in sheep. (A) New Zealand sheep used for this study. (B) CH4 yields from the sheep in grams of CH4/kg dry matter intake (DMI) were measured using open-circuit respiration chambers (http://www.globalresearchalliance.org). (C) CH4 yield measurements from 22 sheep (each with two time points) sorted by mean values. Four high (red) and four low (blue) emitters are selected for further study. P-value indicates the statistical significance of the differences in CH4 yield between the two selected groups.











