Study Finds Manure Injection and Warming Winter Temps Increase Greenhouse Gas Emissions

A University of Vermont study published in Soil Science Society of America Journal revealed that adding manure to fields during the growing season can have lasting impacts on greenhouse-gas emissions during winter thaws. “This could have big impacts as winters become warmer and soils thaw more frequently,” said lead author Carol Adair. “If croplands move farther north with warming climates, this could increase the contributions of agriculture to global GHG emissions.” The research team found that the method of manure application strongly impacted emission rates, with emissions from manure-injected soils up to 20 times greater than those from soils that had manure broadcast or plowed in.