Was the article edited? I don't see a reference to the phrase "three sisters" on it, it just says "corn, beans, and squash." Did the original headline mention it?
Original HN title was "1k year old 3 sisters crop farm found in Northern Michigan"
I really wish that when titles were edited there was some history, it would make it much easier to understand these little discussions based on the original title.
My hunch (based on how my grandfather would cultivate) was to provide a mount of fertilizer for added nitrogen along with the added irrigation aspects.
It's surprising ("I'm shocked, shocked, well not that shocked") how this style of farming somehow made it all the way to my ancestral village for cultivating these New World crops.
