Question

Match List I with List II 
Choose the correct answer from the options given below: 
 

• A. A-IV, B-I, C-III, D-II
• B. A-II, B-IV, C-I, D-III
• C. A-III, B-I, C-IV, D-II
• D. A-III, B-IV, C-II, D-I

Hint:

To easily remember the characteristics:
- "Stubble" $\rightarrow$ "abrupt curve" for high pulverization.
- "Sod" $\rightarrow$ "long, gentle curve" to turn tough sod over intact.
- "Slat" $\rightarrow$ "slatted design" to prevent sticking in high-clay soils.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The moldboard plow is a primary tillage implement designed to cut, lift, fracture, and invert the soil.
The shape and curvature of the moldboard determine how the soil is turned and pulverized.
Different moldboard designs are optimized for specific soil types and field conditions.
Detailed Explanation:
Let us match the moldboard types with their physical and operational characteristics:
- A. General Purpose: This type features a medium curvature.
It is designed to turn the soil gently, providing a moderate balance of turning and pulverization.
This matches with III. Medium curvature, turns the soil gently and gives medium pulverization.
- B. Stubble: This design has a short, broad moldboard with an abrupt upward curve.
This abrupt turn causes the soil to fracture and crumble thoroughly.
This matches with I. Short and relatively broad mould board curved abruptly near the top and gives thorough pulverization.
- C. Sod (Breaker): This type is long and narrow with a gradual, gentle slope.
It is designed to lift and flip over intact strips of tough, grassy sod with minimal breaking or pulverization.
This matches with IV. Long moldboard and gives thorough turning but less pulverization.
- D. Slat: This moldboard has open spaces or slats running along its length.
These open spaces reduce the surface area in contact with the soil, helping the plow scour and slide cleanly through sticky, high-clay soils.
This matches with II. Preferred for more sticky soils where it is difficult to scour.
Combining these pairs yields the sequence: \[ \text{A - III}, \ \text{B - I}, \ \text{C - IV}, \ \text{D - II} \] This sequence matches Option (C).

Step 2: Final Answer:
The correct matching sequence is A-III, B-I, C-IV, D-II.