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.

• Which risk increases when Roman siege ramp foundations experience differential soil settlement?
• Which structural benefit did interlocking brick construction provide to 18th-century shipyards?
• Which risk increased during rapid Roman road construction due to extensive deforestation?
• Which structural issue was mitigated by Brunel's use of wrought iron chains in the Clifton Suspension Bridge construction?
• Which structural instability primarily affected Roman fortifications incorporating stacked earthen ramparts?
• Which consequence results from incorrectly tempering a gladius during Roman siege warfare weapon manufacture?