Which effect arises from intensive maize monoculture on pre-Columbian chinampas without nutrient replenishment?

💡 Explanation

When maize monoculture lacks nutrient replenishment, nitrogen depletion occurs because the crop extracts available soil nitrogen reducing the substrate for nitrogen fixing bacteria, thus limiting atmospheric nitrogen conversion. Therefore, decreased nitrogen fixation results rather than resistance to pathogens, elevated pH, or phosphorus availability which are linked to counteracting or distinct nutrient cycling mechanisms.

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