Which outcome limited rice terrace scalability circa 1500 AD?

💡 Explanation

Erosion limited terrace scalability primarily because soil creep removed topsoil progressively; it caused a reduction in the depth of arable land, and therefore constrained crop production rather than allowing sustained harvests, because of inherent instability.

• Which outcome most threatens a late-10th century timber 'ravelling bridge' during a river flood?
• Which increased risk exists when Roman concrete degrades?
• Which structural problem was frequently encountered when Roman legionary fortresses extended timber ramparts on sloped ground?
• Which outcome of irrigation control increased using Al-Khwarizmi's algebra?
• Which limitation arises when using a brass astrolabe in marine navigation within equatorial regions versus higher lattitudes?
• Which risk increased in Viking longships utilizing overlapping planks?