Which consequence resulted from the 'Milpa cycle’s' reliance on maize?

💡 Explanation

Increased soil nutrient depletion occurs via nutrient extraction, because the monoculture of maize lacks diverse root systems to restore nutrients. Continuous planting of maize without crop rotation leads to soil exhaustion; therefore, nutrient depletion increases rather than improves soil health under this constraint.

• Which environmental risk dramatically increased when the Three Sisters system promoted maize yields above sustainable thresholds on sloped terrain?
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