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← HistoryWhich long-term outcome occurred from repeated maize monoculture in Tehuacan Valley?
A)Increased genetic diversity of maize
B)Decline in soil organic matter✓
C)Enhanced nitrogen fixation in soils
D)Improved resistance to pest infestations
💡 Explanation
Reduced biodiversity occurred because continuous cropping without crop rotation accelerates soil nutrient depletion via nutrient uptake, thus reducing soil organic matter; therefore, overall soil fertility decreased, rather than improvements in other soil biome functions.
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