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← HistoryWithin chinampa agriculture, which limit arises if excessive nutrient-rich sediment accumulates on the plots?
A)Alkalinity increases, inhibiting nitrogen fixation
B)Salinity increases, creating osmotic stress
C)Waterlogging increases root hypoxia✓
D)Acidity increases affecting phosphorus availability
💡 Explanation
When sediment overly accumulates, the reduced porosity of the soil decreases infiltration; consequently waterlogging conditions results from sustained damp from capillary action. Therefore, root hypoxia sets limits to chinampa agriculture, rather than salinity/alkalinity which would require arid/leaching environments or different environmental conditions.
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