Which limiting outcome did annual flooding most directly prevent in pre-Columbian chinampa agriculture of the Valley of Mexico?

💡 Explanation

When annual flooding occurred, it leached accumulated salts away from the chinampa topsoil profile via hydraulic action, rather than allowing their concentration through capillary transport and evapotranspiration. Therefore topsoil salinization was prevented, rather than weed overgrowth, nutrient depletion, or collapse, which have different primary causal mechanisms.

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