That’s the entrance to Central Park at Central Park North (110th Street) and Malcolm X Boulevard. There are no farms nearby.
Part of building a perimeter wall is building entrances in it. There are nineteen named “gates” – there are no gates, merely gaps in the stone wall – as of today. My favorite, or course, is the Engineers Gate at Fifth Avenue and 90th Street. The original names were chosen, supposedly, to represent trades of various people prominent in New York’s history, but I’m not immediately thinking of any farmers who fit that description.
In any case, the number of named gates goes up by one tomorrow: the currently-unnamed gate immediately to the east of the Farmers Gate will be renamed The Gate of the Exonerated, after the “Central Park Five.” Perhaps that new name will serve as a reminder about the problems with rushing to judgement.