What does contour ploughing do to the flow of water?

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Accelerates the flow of water

Decelerates the flow of water

No effect

Reverses the flow of water

answer is B.

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Detailed Solution

Contour ploughing decelerates the flow of water. It reduces the speed of running water and effectively reduces soil erosion. Contour ploughing is a practice of cultivating along contour lines. The slopes and elevation are considered while planting crops along the contours. The running water faces a break when it reaches a contour line with cultivation. The water seeps into the soil, and the eroded soil gets deposited in the upper contour lines. It is practised along the northeastern slopes where soil erosion causes major problems like decreased productivity and soil fertility. It is a form of sustainable agriculture where the soil is conserved for continuous use.

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