Question : The method of soil conservation in which rocks are piled up to slow down the flow of water which prevents gullies and further soil loss is called?
Option 1: Mulching
Option 2: Contour barriers
Option 3: Rock dam
Option 4: Terrace farming
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Correct Answer: Rock dam
Solution : correct answer is Rock dams.
Rock dams are small barriers made up of stone, sand or gravel across a drainage. Its main purpose is to reduce erosion in a drainage channel by restricting the velocity of flow in the channel.
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