Which risk was amplified by repeated irrigation cycles with untreated river water in Sumerian agriculture?

💡 Explanation

When untreated river water is repeatedly used for irrigation, capillary action wicks salts to the surface subsequently evaporating, concentrating minerals because the water contains dissolved salts. Therefore soil salinization results, rather than infestations, algae, or groundwater issues, which involve unrelated biomes and hydraulics.

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