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← HistoryWhich outcome results from depleted hydraulic head at Aztec chinampa systems?
A)Increased surface albedo heating
B)Elevated soil salinity stress✓
C)Reduced nitrogen fixation rates
D)Accelerated soil erosion losses
💡 Explanation
Elevated salinity arises because reduced water flow causes less leaching, leading to salt accumulation via capillary action, the physical mechanism involved. This affects sensitive crops; therefore, salinity stress develops, rather than promoting nitrogen fixation which needs moisture from the hydraulic head.
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