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← GeographyWhich outcome occurs when excessive irrigation increases soil salinity?
A)Osmotic stress harms plant roots✓
B)Increased nitrogen fixation occurs rapidly
C)Weathering of bedrock accelerates widely
D)Soil organic matter production amplifies quickly
💡 Explanation
Osmotic stress results because capillary action pulls dissolved salts to the soil surface; this concentrates the salts via evaporation. Salinization inhibits water absorption, therefore roots dehydrate rather than benefiting from nutrient uptake or accelerated decomposition.
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