• Aerodynamic Design of Shelterbelts and Windbreaks:
• shelterbelt reduces downwind wind speed over a leeward distance proportional to its height ($H$).
• To prevent wind eddies from wrapping around the flanks and eroding protected fields, the minimum continuous length of a shelterbelt should be at least 24 times its height ($24 H$).
• Conclusion: 24 (Option 2).

Correct option: (2) 24

• Agricultural Storage and Thermal Processing:
• Janssen's Theory $\to$ (IV) Storage Structure: Foundational theory for calculating lateral and vertical pressure loads in deep grain silos/bins.
• CAP (Cover and Plinth) $\to$ (II) Bag Storage: Outdoor grain storage method in India where bagged grain stacks are placed on raised plinths and covered with polythene tarpaulins.
• Newton's Law of Cooling $\to$ (I) Convection: States that heat loss rate from a solid body is proportional to temperature difference with the surrounding fluid.
• Sensible Heating $\to$ (III) Constant Humidity: Heating air across psychrometric lines at constant absolute/specific humidity without adding or removing moisture.
• Matching Result: (A) - (IV), (B) - (II), (C) - (I), (D) - (III) (Option 4).

Correct option: (4) (A) - (IV), (B) - (I), (C) - (), (D) - (ttl)

Matching the items of List I with List II for Check basin and border irrigation:

The correct combination is Option 2: (A) - (IV), (B) - (1), (C) - (), (D) - (tH).

Correct option: (2) (A) - (IV), (B) - (1), (C) - (), (D) - (tH)

• Water Advance Rule in Check Basin Irrigation:
• The One-Fourth Advance Rule:
• In check basin irrigation design, water advance across the entire basin floor should be completed within one-fourth ($t_a \le \frac{1}{4} t_n$) of the time required for the net irrigation depth to infiltrate into the soil.
• Hydrologic Rationale:
• Restricting advance time to $\le \frac{1}{4}$ of net infiltration time ensures that the contact opportunity time is nearly equal between the inflow edge and the far end of the basin, achieving a distribution uniformity ($DU$) exceeding $85 - 90\%$ and preventing excessive deep percolation losses near the inlet.
• Conclusion: One-fourth of the time required to infiltrate the net depth of irrigation water (Option 1).

Correct option: (1) One-fourth of the time required to infiltrate the net depth of irrigation water