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I've been looking at Tierra del Fuego on Google's street view for the past fifteen minutes out of boredom. It's quite a beautiful place. It's also decently-sized as well - with a land area of nearly 48 thousand square kilometres, it's about the size of two New Jerseys or New Hampshires combined.

Reading about its climate is fascinating - it's subpolar, but at the same time extremely mild. As somebody who lives in a subtropical part of the world that is hot and muggy for much of the year, I kind of wish I could live there.

However, it's not hard to see why Tierra del Fuego would be an uninviting place to settle in practice. The island is in the furious fifties, and is very windy as a result. This, combined with the already cold climate, makes it a very chilly place. Tierra del Fuego is named what it is (Spanish for "land of fire") because the explorers who sailed past it observed indigenous Fuegians making fires everywhere to keep warm. These Fuegians lived as hunter-gatherers, and Wikipedia will tell you that the Yaghan people (most likely other groups as well) evolved a significantly higher metabolism than most human beings in order to keep warm. Today, most agriculture on Tierra del Fuego involves grazing sheep and cattle on the grasslands there.

As far as I'm aware, the settlers who went to Tierra del Fuego and replaced the natives mainly did so during a gold rush. Nobody saw the island and thought of it as prime cropland. The place has gold, good pastureland, oil, natural gas and good fishing, but I haven't been able to find out what crops grow there when researching it. Clearly not much does.

In an alternate timeline in which Tierra del Fuego is settled more thoroughly and perhaps earlier than in OTL by some sort of European or post-colonial state, what crops can the settlers bring to this place that will actually grow? Potatoes? Barley?
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