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← HistoryWhich soil issue was amplified where terrace irrigation failed during Incan agriculture?
A)Increased topsoil erosion✓
B)Altered nitrogen fixation
C)Enhanced soil salinization
D)Accelerated nutrient depletion
💡 Explanation
Topsoil erosion accelerates because when terrace walls crumble during irrigation failure, sheet erosion increases due to gravity pulling soil down slopes rather than water distributing evenly; therefore increased erosion accelerates, rather than the other listed soil changes.
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