My father says he took us to see it. As best I can tell, it stopped operating (and the farm in Plainsboro stopped working as a dairy farm) before I was born, and I think my father's confusing things he saw with things he took us kids to see. But I am certain he's pointed out the farm's location as we've gone past it, since it's awfully convenient to many things, along the way to the particle physics lab and whatnot.