Top 10 High-Frequency Practical Viva Questions by Department
External examiners consistently test fundamentals of laboratory reagents, field measurements, and equipment calibrations:
Key Exam Takeaways:
- Agronomy: What is the seed germination percentage calculation? Formula: (Number of normal seedlings germinated / Total seeds planted) x 100.
- Soil Science: Why is 1N Ammonium Acetate used for determining available Potassium? Because NH4+ ions have an identical ionic radius (1.43 Å) to K+ (1.33 Å), effectively displacing exchangeable potassium.
- Horticulture: What is the ideal temperature and duration for hot water treatment of mango against fruit fly? 48°C for 60 minutes.
- Pathology: What is the composition and sterilization condition of PDA (Potato Dextrose Agar)? 200g potato infusion, 20g dextrose, 20g agar per liter; autoclaved at 121°C (15 psi) for 15-20 minutes.
- Entomology: What is the difference between Piercing-Sucking mouthparts and Chewing mouthparts? Piercing-sucking (Hemiptera) have needle-like stylets enclosed in a rostrum, while chewing (Orthoptera/Coleoptera) feature toothed mandibles.
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