Which agricultural benefit primarily resulted when Aztec chinampa systems used interwoven plant roots within artificial islands?

💡 Explanation

When interwoven plant roots were used in chinampas, they acted like a biological filter because the root matrix captured and retained dissolved nutrients, reducing their escape into the surrounding lake system. Therefore, reduced nutrient leaching resulted, rather than frost resistance, carbon sequestration, or pollination that require unrelated factors.

• Which structural consequence arose in medieval motte-and-bailey fortifications when the motte's clay foundation experienced prolonged saturation?
• Which risk increases when stacked defensive walls have excessive soil pore pressure following intense rain?
• Which consequence occurs when Mesopotamian irrigation canals excessively saturate surrounding soil over time?
• Which soil degradation process accelerates on pre-Columbian Andean terraces lacking sufficient drainage?
• Which systematic hazard arose in 18th-century long-distance seafaring when using precise chronometers for longitude determination?
• Which stability risk increases when the clay bricks of a ziggurat experience prolonged ground saturation?