Which limiting factor constrained the maximum size of pre-Columbian chinampa agricultural islands in Mesoamerica?

💡 Explanation

When chinampas grew too large, the instability of the surrounding artificial banks increased because the accumulated weight strained the shallow lake bed, leading to collapse and island loss. Therefore bank instability limited chinampa size, rather than oxidation, depletion, or competition which would affect productivity but not overall structural integrity.

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