+ If you are missing your Harvester title please speak to Farmer Johnston in town, as he may have it for you!

Is it avilable only for those who opened 50 Horns or even for those who opened 5-10 Horns ?
I'm asking this because i saw many of them saying that they got the title by opening 2-5 horns. I even spoke to the NPC farmer johnson but i didnt see anything related to title so, i opened 10 horns & spoke to him again but got nothing.
Is there anything still that has to be done?