Which soil degradation outcome arises when pre-Columbian terrace farming lacks contour plowing optimization when cultivating maize?

💡 Explanation

When terrace farms lack optimized contour plowing, water runoff accelerates soil erosion because gravitational forces overwhelm the soil structure, leading to topsoil depletion. Therefore loss on slopes results, rather than nitrogen reduction, salinity increase, or waterlogging, all of which have different primary causes.

• Which structural weakness increased the risk of collapse of a Roman castrum wall segment during prolonged siege?
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