Farmers are being urged to argue their case amid growing opposition against a badger cull to combat bovine tuberculosis.
NFU president Peter Kendall said the government should be applauded for sticking with its decision to press ahead with a badger cull.
But farmers should not sit back and assume that a cull was going to happen, he warned.
More than 110,000 people have now signed an e-petition calling on the government to abandon badger culls due to take place in south-west England.
Mr Kendall said farmers should act as "ambassadors" in the fight against bovine TB, urging them to write to the press and explain why a cull was needed.
"When you explain that it is a necessity, the vast majority of people accept that we have to do something about this dreadful disease."
Farmers writing to the media could draw on their own experiences, explaining what TB had done to their cattle and the effect it had on their businesses.
"We cannot expect the government to make difficult decisions and do all the work. We have to be ambassadors about the problems this is causing."Johann Tasker on G+
More on this topic
Badger cull and bovine TB dedicated pages.
Badger cull forum