Which outcome improved agricultural yields when pre-Columbian civilizations implemented chinampa construction?

💡 Explanation

When chinampas ('floating gardens') were constructed, enhanced-nutrient cycling from decomposing aquatic vegetation and waste occurred because of a self-contained artificial ecosystem, boosting soil fertility. Therefore enhanced nutrient cycling results rather than frost reduction, drainage, or pest management, which require different agricultural techniques.

• Which limiting factor constrained the positional accuracy of pre-telescopic Islamic astronomical instruments?
• Which outcome during a siege resulted from Roman fortifications utilizing the testudo formation approach?
• Which adjustment compensates for seasonal star chart variations when using astrolabes at differing latitudes?
• Which resource limitation primarily constrained the expansion of pre-Columbian chinampa agriculture around Lake Texcoco?
• Which soil degradation risk increases when pre-Columbian terrace construction lacks sufficient drainage?
• Which degradation accelerates on Roman roads traversing regions with high groundwater tables?