UNIVERSITY PARK, Pa. — By adopting a few beneficial management practices, farms — and particularly dairy farms — can play a key role in reducing greenhouse gas emissions that are warming the planet, according to a team of researchers.

Based on a series of climate-model projections, the researchers found that if farmers worldwide set a target to adopt practices to reduce their emission of greenhouse gases, particularly methane and nitrous oxide, by just 25 percent over the next 30 years, they could reduce overall warming by 0.21 degrees Celsius, or 6 percent of projected total warming. Scientists have set targets to reduce emissions of greenhouse gases to keep global temperatures from rising 2 degrees Celsius above levels experienced in preindustrial times.

Emission…