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The formation of separate ethnic groups from common ancestors is known as
Erosion
The process by which natural forces, such as water or wind, remove soil, rock, or dissolved material from one location and transport it to another.
Strip Cropping
An agricultural practice where crops are grown in alternating strips to reduce soil erosion and encourage biodiversity.
Contour Farming
An agricultural technique where farming practices like plowing are done parallel to the contours of the land, aimed at reducing soil erosion.
Terracing
The practice of creating flat platforms on sloped land, often used in agriculture to reduce soil erosion and support water conservation.