this post was submitted on 07 Feb 2026
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The original statement implies the technique was widespread across Native American groups. It's almost certainly false for the ones here in South America; there's a lot on terrace farming and slash-and-burn, but AFAIK nothing that resembles the companion system of the three sisters. (I wonder if it's due to the prominence of subterranean crops. Taters, yucca, sweet potatoes.)
The Haudenosaunee/Iroquois and the Cherokee/Tsalagi being related hints me it was something they developed.
That's what I was thinking. Native Groups in many parts of North America didn't practice agriculture at all or used rudimentary agriculture.