tundra farm?

[Heroes]

I conquer Spain and notice that they have several farms on tundra tiles, generating 2 foods (I learn civil service, but don't learn biology yet). My worker moves to another tundra tile nearby, but doesn't see the farm option. What's going on? Tundra farm is only a feature of AI?

[Blake]

My automated workers make tundra farms too. I'm not sure what the deal with them is. Maybe it's along rivers only?

[Hamdinger]

Yeah, I think you can only put farms on tundra if it's next to a river.

[Arkalius]

Yes, only tundra next to fresh water can have farms built on them. They don't carry irrigation or anything, they have to be right next to the fresh water.

[Skanky Burns]

I guess they are like deserts then.