Which soil characteristic primarily allowed Aztec chinampas to sustain continuous maize cultivation?

💡 Explanation

When the groundwater table is high, capillary action continuously replenishes moisture and nutrients to the soil in the chinampas because water moves upwards through small spaces, providing a readily available source for plants. Therefore, a high water table is key, rather than ample clay, calcareous rock, or ash, which relate to different soil fertility aspects.

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