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Selected studies of methane emissions from widely used techniques. (A) Effects of dry matter intake (DMI) on daily CH4 emissions in dairy and beef cattle associated with detection methods, and (B) effects of DMI on average daily CH4 emissions in dairy and beef cattle. SF6 = sulfur hexafluoride tracer technique; IRC = indirect respiration chamber; GF = GreenFeed system (C-Lock Inc., Rapid City, SD, USA). Source: adapted from Table 1.
