Which agricultural adaptation occurred in pre-Columbian chinampa systems due to nutrient stratification of the soil?

💡 Explanation

In chinampas, nutrient stratification occurs because organic matter settles. Therefore, cyclical mud redistribution from the base replenishes the surface soil fertility because nutrient-rich sediments are brought up from the bottom, rather than companion planting, terracing, or burning, which address different limitations.

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• Which function in early Islamic astronomical studies was improved by incorporating trigonometry into astrolabe design?
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