Which outcome weakens ancient South American terraced farming?

💡 Explanation

A lack of crop rotation decreases agricultural yields because continuous cultivation depletes the soil nutrient levels through the mechanism of nutrient leaching, therefore plant growth is inhibited and the terrace system is weaker rather than retaining higher yields with constant planting.

• Which outcome related to material failure arises in ancient Mesopotamian ziggurats when alkaline soil moisture permeates the brickwork?
• Which weakening outcome increased in early cast iron cannons due to manufacturing limitations?
• Which outcome occurred on Viking longships sailing upwind when the angle between the sail and the keel became too acute?
• Weak hemp fibers induced what outcome involving Viking rope bridges?
• During 18th-century shipbuilding, which outcome resulted if timbers exceeded a particular moisture content at fitting?
• Which navigational outcome changed with the introduction of Harrison's H4 timekeeper relative to lunar distance methods?