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← HistoryWhich cultivation effect occurs when chinampa hydraulic systems fail?
A)Increased soil salinity reduces yields✓
B)More nitrogen fixation enriches soils
C)Controlled flooding increases water availability
D)Decreased sediment erosion deposits material
💡 Explanation
Increased soil salinity reduces yields because failed hydraulic control prevents regular flushing of dissolved salts by capillary action. Therefore, yields decline on productive chinampas, rather than improving water availability, nitrogen fixation, or controlling sediment erosion if designed right.
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