If I was stuck on an island and I had one crop to choose it'd either be sweet potato or amaranth. Probably amaranth if I'm being honest because under the right conditions it will spread like wildfire and you get (pseudo)grains out of it along with spinach-except-better, but amaranth is not as well known in the west these days. At some points in human history there's archaeological evidence that amaranth family crops were of major importance though.
But sweet potato is right up there too. It also spreads like a weed and requires virtually no intervention under the right conditions. Shit, you can even try drowning sweet potato and it'll be like "Alright, bet" and it'll continue to grow. Tuber+greens is a winning combination.
If I was stuck on an island and I had one crop to choose it'd either be sweet potato or amaranth. Probably amaranth if I'm being honest because under the right conditions it will spread like wildfire and you get (pseudo)grains out of it along with spinach-except-better, but amaranth is not as well known in the west these days. At some points in human history there's archaeological evidence that amaranth family crops were of major importance though.
But sweet potato is right up there too. It also spreads like a weed and requires virtually no intervention under the right conditions. Shit, you can even try drowning sweet potato and it'll be like "Alright, bet" and it'll continue to grow. Tuber+greens is a winning combination.