Which soil enhancement mechanism primarily sustained the crop yield of Aztec chinampas (floating gardens)?

💡 Explanation

Chinampas relied on a closed-loop system; dredging of nutrient-rich sediment and organic matter from canals provided a continuous supply of fertilizer, thus sustaining high yields. Therefore nutrient replenishment resulted, rather than fixation, terracing, or acidity control, none of which formed the fundamental construction and function chinampa agriculture.

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