Which critical process limits the success of pre-Columbian terrace farming during prolonged drought periods?

💡 Explanation

When intense rainfall occurs on terraced slopes without sufficient vegetation, runoff intensifies because of gravity and water cannot infiltrate saturated ground, leading to erosion down the terrace steps. Therefore soil erosion is most limiting, rather than altered nutrients or shifted ecology which require normal rainfall or stable slope temperature.

• Which process limited the lifespan of Roman roads constructed with multiple layers of materials?
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• Which navigational error increases when a sextant mirror distorts the horizon line during twilight observations?
• Which structural weakness increased in Roman castra wall when built on clay-rich soil during seasonal rains?
• Which problem commonly occurred when Euphrates river levels fluctuated in Sumer irrigation canalscirca 3000 BC?
• Which risk increased within settlements as ancient Mesopotamian canal systems aged and deteriorated without maintenance?