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← HistoryWhich outcome occurs when extensive pre-Columbian chinampa systems experience prolonged freshwater inundation?
A)Increased nitrogen fixation within soils
B)Decreased crop yield due to salinization✓
C)Enhanced oxidation ferrous soil compounds
D)Accelerated silt deposition on field
💡 Explanation
Decreased crop yield results from salinization because inundation elevates the water table, drawing salts to the surface via capillary action. This inhibition mechanism concentrates salt, therefore inhibiting crop growth, rather than promoting nitrogen fixation or silt deposition.
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