Replacing fertiliser nitrogen with biologically fixed nitrogen (BFN) through legumes has been suggested as a strategy for nitrous oxide (N₂O) mitigation from intensively managed grasslands. On our site the mitigation strategy reduced N₂O emissions by 54 % and 39 % in 2015 and 2016, while annual yields were similar under mitigation management. We conclude that N₂O emissions can be effectively reduced without losses in yield by increasing the clover proportion and reducing fertilisation.