Question

Contour bunds are recommended on the land slopes:

• A. Up to 2%
• B. Up to 6%
• C. Up to 10%
• D. Up to 12%

Hint:

Soil conservation methods are specific to land slope. Remember these general guidelines: - \textbf{Contour Bunding:} Slopes up to 6% - \textbf{Graded Bunding:} Used in areas of higher rainfall on similar slopes. - \textbf{Bench Terracing:} Slopes from 16% to 33%

Answer 1

The Correct Option is B

Step 1: Grasp the function of contour bunds. Contour bunds are rudimentary earthen structures built along land contours. Their main objective is to conserve soil and water by slowing runoff, halting soil erosion, and enhancing water infiltration.
Step 2: Determine the suitable slope gradient. Contour bunding is most efficient on gentle to moderate slopes that allow for secure runoff management. On steep slopes, this method is not effective and can be hazardous due to potential bund failure under high water pressure. Typically, contour bunds are advised for agricultural land with slopes up to 6%. For steeper inclines, alternative methods such as bench terracing are employed.