New research by Teagasc and the Agri-Food and Biosciences Institute (AFBI) has found that switching from CAN to urea with the urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT) reduced direct greenhouse gas emissions associated with fertiliser application by 73% on average in grassland. Treating urea fertiliser with NBPT also reduced ammonia losses by up to 78.5%, bringing them in line with those from CAN.Similar results were observed on spring barley crops. The experimental trial sites included Johnstown Castle and Moorepark for Teagasc and Hillsborough for AFBI.