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What was the Three Sisters farming system?
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Origins of agriculture
Harvesting wheat on a farm in the grain belt near Saskatoon, Saskatchewan, Canada. A potash mine appears in the distant background.
The Three Sisters is a traditional Indigenous agricultural practice involving the symbiotic interplanting of corn, beans, and squash. Also known as milpa in Mesoamerica, this system relies on the complementary biological needs of the three crops.1
How the System Works
The plants are typically sown together in mounds, creating a self-sustaining ecosystem:12
- Corn: Known as the eldest sister, it emerges first and provides a natural trellis for the beans to climb.12
- Beans: These plants fix nitrogen in the soil, providing essential nutrients for the corn and squash.12
- Squash: The youngest sister grows along the ground, where its large leaves shade the soil, retaining moisture and suppressing weeds.12
Significance
This method promotes biodiversity and food security, as the crops provide a balanced diet of proteins, starches, and vitamins. Beyond its agricultural efficiency, the Three Sisters hold deep cultural and spiritual significance for many Native nations, including the Iroquois and Cherokee, who view them as sacred "sustainers".1