Which agricultural innovation mitigated nutrient depletion from continuous maize cultivation in pre-Columbian Mesoamerica?

💡 Explanation

When cultivated continuously, maize depletes soil nutrients; chinampas used dredged lake sediments and decaying vegetation as a fertilizer source to replenish soil fertility through continuous nutrient cycling. Therefore improved soil fertility by chinampas results, rather than crop rotation, terracing, or irrigation which serve different purposes related to water and soil management.

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