Which mechanism reduces soil erosion on terraces using pre-Columbian agriculture techniques?

💡 Explanation

When terraces are constructed, contour planting follows the terrace contours, establishing rows perpendicular to the slope, this inhibits surface runoff because tilled furrows limit water speed, increasing infiltration. Therefore reduced erosion results, rather than increased root density, water redirection or raindrop impact which involve fundamentally different processes on fields.

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