Which challenge did pre-Columbian chinampa farmers face in maximizing maize yields within this environment?

💡 Explanation

When intensively farming chinampas, nitrogen depletion occurs because continuous planting and harvesting of maize removes nitrogen from the soil, exhausting nutrient reserves faster than natural replenishment. Therefore nitrogen depletion results, rather than other deficiencies,toxicity or water issue each based on different soil chemistry and environmental mechanisms.

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