Which risk increases when long-fallow crop rotation on pre-Columbian chinampa (raised bed) agriculture lacks consistent organic replenishment?

💡 Explanation

Nutrient depletion intensifies because the mechanism of nutrient cycling via decomposition of added organic matter is reduced. The soil's natural reserves are steadily removed and none are put back; therefore, the problem magnifies rather than stabilizes, and the plants effectively starve.

• Which consequence results when freeze-thaw cycles act on stone-faced Inca terrace walls?
• Which navigational risk increased for Medieval longships traversing open water?
• Which limit was primarily overcome due to terrace construction in ancient mountainous rice farming?
• Which outcome regularly occurred in pre-Columbian chinampa agriculture when insufficient dredging was performed around the raised beds?
• Which outcome commonly occurred when early chinampa farmers did not implement proper 'closing' methods?
• Which outcome resulted when Mesoamerican farmers cultivated maize in chinampas with high water tables?