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c. 1493, mature agricultural systemReputable source · 2 sourcesWell documented

Terracing and Freeze-Dried Chuno Turn the Andes into Farmland

Stone terraces climb mountainsides while nightly freezing and daytime sun turn potatoes into a food that keeps for years

On the timeline · around c. 1493, mature agricultural system · Tawantinsuyu at Its HeightTawantinsuyu at Its HeightTerracing and Freeze-Dried Chuno Turn the Andes into Farmland14751480148514901495150015051510

Quick facts

Farming tool
Chakitaqlla (foot plough)
Preserved potato
Chuno (freeze-dried)
Preserved meat
Ch'arki (freeze-dried)
Storage extension
Freeze-drying roughly doubled shelf life

What happened

To farm the steep, high-altitude Andes, the Inca built extensive stone terracing on hillsides, paired with canals and irrigation networks that let them drain wetlands and redirect water across long distances. Fields were worked with simple tools, including the chakitaqlla, a wooden or bronze foot plough, and teams of about seven or eight farmers worked together, men breaking ground and women following to sow seed. Potatoes, one of the staple crops alongside maize and quinoa, could be preserved through a freeze-drying process producing chuno. World History Encyclopedia describes potatoes being dried or freeze-dried this way, extending their usable life to roughly four years in storage, far longer than fresh potatoes would last. A parallel technique produced ch'arki, freeze-dried meat, a popular food for travelers. Crop rotation and fertilizer from dried llama dung, guano, or fish heads helped manage soil fertility across this terraced terrain.

Why it matters

Terracing and chuno together let the Inca farm environments, high-altitude slopes and unpredictable frost, that would otherwise support far smaller populations, and the resulting surplus is what filled the qollqa storehouses that fed the empire's armies, laborers, and famine relief. Chuno remains in everyday use in the Andes today, a rare case of an Inca-era technology surviving essentially unchanged for more than five centuries.

How we know

World History Encyclopedia's account of Inca food and agriculture describes both the terracing infrastructure, extensively documented archaeologically, and the freeze-drying process, which is still practiced by Andean farmers and has been studied by agricultural historians as a continuous tradition.

Sources

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Part of a timelineThe Inca Empire26 events · How a highland kingdom without writing, wheels, or iron built the largest empire the Americas ever saw, then lost it in a single generationView all →