Which risk increases when pre-Columbian Andean terrace farming lacked sufficient drainage channels?

💡 Explanation

When drainage is insufficient, soil saturation occurs because water accumulates within the terraces leading to increased porous pressure and reduced effective stress. Therefore, slope instability results, rather than nutrient deficiencies, reduced pollination or increased pest presence which are linked to other environmental factors.

• Which defensive outcome resulted when a Roman fort wall’s timber bracing decayed over time in Northern Europe?
• Which consequence occurred during 18th-century celestial navigation when sextant mirror misalignment was undetected?
• Which risk increases when charcoal production in a 16th-century blast furnace is not quenched correctly?
• Which structural vulnerability increased within late-Roman castra when defensive perimeters significantly expanded?
• Which visual artifact emerged when early Islamic astronomers observed stars through unpolished lenses?
• Which initial agricultural effect arises when terraced farming introduces level platforms on slopes?