Which risk increased for ancient Andean terraced farms near Machu Picchu when excessive rainfall occurred soon following major terrace construction?

💡 Explanation

Nutrient leaching increases because surface runoff intensifies transporting dissolved minerals away. The water carries away essential nutrients through the soil profile following a heavy rainfall shortly after the soil is disturbed in construction; therefore, the root systems struggle; rather than aphid infestation, nitrogen changes, or shading issues.

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