Question

In soil erosion control measure, the following statement are true: A. Sloping outward terraces are used in low rainfall region. B. Wind strip cropping is done in parallel to direction of wind. C. Graded bunds are used in high rainfall areas. D. Shelter break are used to prevent rainfall erosion. E. Grassed waterway acts as outlet for graded terraces. Choose the correct answer from the options given below:

• A. A, D, E Only
• B. B, D, E Only
• C. A, C, E Only
• D. B, C, D Only

Hint:

Important conservation structures:
• Wind strip cropping \(\rightarrow\) Perpendicular to wind direction
• Shelter belts \(\rightarrow\) Control wind erosion
• Graded bunds \(\rightarrow\) High rainfall areas
• Grassed waterways \(\rightarrow\) Safe runoff disposal

Answer 1

The Correct Option is C

Concept: Soil and water conservation measures are adopted to:
• Reduce runoff
• Prevent soil loss
• Control wind erosion
• Safely dispose excess water Different conservation structures are suitable under different climatic and topographic conditions.

Step 1: Analyzing Statement A. Statement A says: \[ \text{“Sloping outward terraces are used in low rainfall region.”} \] This statement is correct. Outward sloping terraces:
• Drain excess water outward
• Reduce waterlogging They are commonly used in: \[ \boxed{ \text{Low rainfall areas} } \] Hence: \[ \boxed{\text{Statement A is correct}} \]

Step 2: Analyzing Statement B. Statement B says: \[ \text{“Wind strip cropping is done parallel to wind direction.”} \] This statement is incorrect. Wind strip cropping is practiced: \[ \boxed{ \text{Perpendicular to prevailing wind direction} } \] so that wind velocity reduces and soil movement decreases. Hence: \[ \boxed{\text{Statement B is incorrect}} \]

Step 3: Analyzing Statement C. Statement C says: \[ \text{“Graded bunds are used in high rainfall areas.”} \] This statement is correct. Graded bunds are designed with longitudinal slope to safely dispose runoff water. They are suitable in: \[ \boxed{ \text{High rainfall regions} } \] where runoff volume is significant. Hence: \[ \boxed{\text{Statement C is correct}} \]

Step 4: Analyzing Statement D. Statement D says: \[ \text{“Shelter break are used to prevent rainfall erosion.”} \] This statement is incorrect. Shelter belts or shelter breaks are primarily used for: \[ \boxed{ \text{Wind erosion control} } \] They reduce wind velocity and protect soil from wind action. Hence: \[ \boxed{\text{Statement D is incorrect}} \]

Step 5: Analyzing Statement E. Statement E says: \[ \text{“Grassed waterway acts as outlet for graded terraces.”} \] This statement is correct. Grassed waterways:
• Safely convey runoff
• Prevent gully formation
• Serve as drainage outlets Hence: \[ \boxed{\text{Statement E is correct}} \]

Step 6: Identifying the correct statements. Correct statements are: \[ A,\; C,\; E \] Incorrect statements are: \[ B,\; D \] Thus the correct option becomes: \[ \boxed{ (C)\ A,\; C,\; E\ Only } \] Final Conclusion: The true soil erosion control statements are: \[ \boxed{ A,\; C,\; E } \] Hence the correct answer is: \[ \boxed{ (C) } \]