Which agricultural outcome improved maize yield in pre-Columbian chinampa systems when farmers introduced 'waffle' beds with raised platforms?

💡 Explanation

When waffle beds were introduced, improved water drainage and aeration of the root zone occurred because the raised platforms prevented waterlogging, crucial for maize growth. Therefore enhanced drainage and aeration resulted, rather than nitrogen fixation, shading, or thermal stability, which require organic matter, dense canopies or specialized soil properties.

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