In my world agriculture doesn't work, the day lasts many years so the people are always on the move. You can't farm if you won't be there for the next 8 or 9 years. Well, When I read this question it got me thinking. After reading this question, it made me wonder, would an airship be able to carry a small plot of farm land?
The plot could be any size. And medieval as well as modern and future situations could have this. The largest Medieval villages would only contain at most 200 people. Modern towns would have more around 700-900. Future cities would contain up to 40,000