🧪 IBPS AFO Interview — Agronomy & Soil Science Questions
IBPS AFO interview agronomy questions: Norin 10 gene in Green Revolution, Khaira disease from zinc deficiency, all 12 SHC parameters, Jhoom regional names, and crop scientific names.
High-Specificity Questions — The Technical Edge
Panels test whether you have genuine subject knowledge or surface-level familiarity. Expect specific questions, not just broad concepts.
Soil Health Card (SHC) — All 12 Parameters
The SHC scheme tests 12 parameters across four categories. Knowing only pH and NPK is insufficient.
| Category | Parameters |
|---|---|
| Basic | pH, Electrical Conductivity (EC), Organic Carbon (OC) |
| Macro Nutrients | Nitrogen (N), Phosphorus (P), Potassium (K) |
| Secondary Nutrient | Sulphur (S) |
| Micro Nutrients | Zinc (Zn), Iron (Fe), Copper (Cu), Manganese (Mn), Boron (B) |
Total: 12 parameters — memorise by category, not as a single list.
Q: What is Electrical Conductivity (EC) and why is it tested? EC measures the salinity of the soil — the amount of dissolved salts. High EC indicates salinity stress, which inhibits nutrient uptake and reduces germination. Critical for coastal and arid soils.
Q: What is Organic Carbon (OC) and why does it matter? OC indicates the amount of decomposed organic matter in soil. It improves soil structure, water retention, and microbial activity. Low OC (below 0.5%) indicates degraded soil that responds poorly to fertilizers.
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High-Specificity Questions — The Technical Edge
Panels test whether you have genuine subject knowledge or surface-level familiarity. Expect specific questions, not just broad concepts.
Soil Health Card (SHC) — All 12 Parameters
The SHC scheme tests 12 parameters across four categories. Knowing only pH and NPK is insufficient.
| Category | Parameters |
|---|---|
| Basic | pH, Electrical Conductivity (EC), Organic Carbon (OC) |
| Macro Nutrients | Nitrogen (N), Phosphorus (P), Potassium (K) |
| Secondary Nutrient | Sulphur (S) |
| Micro Nutrients | Zinc (Zn), Iron (Fe), Copper (Cu), Manganese (Mn), Boron (B) |
Total: 12 parameters — memorise by category, not as a single list.
Q: What is Electrical Conductivity (EC) and why is it tested? EC measures the salinity of the soil — the amount of dissolved salts. High EC indicates salinity stress, which inhibits nutrient uptake and reduces germination. Critical for coastal and arid soils.
Q: What is Organic Carbon (OC) and why does it matter? OC indicates the amount of decomposed organic matter in soil. It improves soil structure, water retention, and microbial activity. Low OC (below 0.5%) indicates degraded soil that responds poorly to fertilizers.
Nutrient Deficiency — Key Linkages
| Deficiency | Crop | Symptom / Disease |
|---|---|---|
| Zinc (Zn) | Rice | Khaira disease — yellowing of leaves, stunted growth |
| Iron (Fe) | Paddy | Interveinal chlorosis (yellowing between veins on young leaves) |
| Boron (B) | Mustard, sugarcane | Hollow stem, brittle tissue |
| Sulphur (S) | Oilseeds | Yellowing of younger leaves |
| Nitrogen (N) | Most crops | Overall yellowing from older leaves first |
| Phosphorus (P) | Most crops | Purple/reddish colouration, poor root development |
Interview tip: "Khaira disease in rice = Zinc deficiency" is a staple panel question.
Jhoom / Shifting Cultivation — Regional Aliases
Jhoom is slash-and-burn shifting cultivation practiced in Northeast India and tribal regions. Know the regional names:
| Region | Local Name |
|---|---|
| Northeast (general) | Jhoom |
| Madhya Pradesh | Dahiya / Bewar |
| Odisha | Podu |
| Andhra Pradesh / Telangana | Podu |
| Himachal Pradesh | Khil |
| Kerala | Punam |
Scientific Names — High-Frequency in Interviews
| Crop | Scientific Name |
|---|---|
| Okra (Lady's Finger) | Abelmoschus esculentus |
| Rice | Oryza sativa |
| Wheat | Triticum aestivum |
| Maize | Zea mays |
| Cotton | Gossypium hirsutum |
| Tomato | Solanum lycopersicum |
| Potato | Solanum tuberosum |
| Groundnut | Arachis hypogaea |
| Soybean | Glycine max |
| Sugarcane | Saccharum officinarum |
The Green Revolution — Norin 10 Gene
Q: What was the significance of the Norin 10 gene in wheat breeding?
Norin 10 was a Japanese semi-dwarf wheat variety carrying the Rht (reduced height) gene. Norman Borlaug incorporated this gene into Mexican wheat varieties, producing high-yielding semi-dwarf wheats that could support heavy fertilizer application without lodging (falling over).
These varieties were introduced to India as Sonora 64 and Lerma Rojo — the foundation of India's Green Revolution wheat production.
Key linkage: Norin 10 → Borlaug's semi-dwarf wheat → Green Revolution → India's wheat self-sufficiency.
Crop Seasons
| Season | Sowing | Harvest | Key Crops |
|---|---|---|---|
| Kharif | June–July (monsoon onset) | Oct–Nov | Rice, Maize, Cotton, Groundnut, Soybean, Arhar |
| Rabi | Oct–Nov (post-monsoon) | Mar–Apr | Wheat, Mustard, Gram, Barley, Peas |
| Zaid | Mar–Apr | Jun | Watermelon, Cucumber, Moong, Muskmelon |
Crop Rotation
Q: Why is crop rotation practised?
- Breaks pest and disease cycles that build up under monoculture
- Legumes in rotation fix atmospheric nitrogen (reduces fertilizer cost)
- Maintains soil organic matter and structure
- Reduces weed pressure
Classic rotation: Wheat → Chickpea (legume) → Rice
Integrated Pest Management (IPM)
IPM uses a hierarchy of pest control strategies — chemicals are the last resort:
- Cultural control — crop rotation, resistant varieties, sanitation
- Biological control — natural predators, parasitoids (e.g., Trichogramma for stem borer)
- Mechanical/physical control — traps, light traps, hand picking
- Chemical control — targeted pesticides only when Economic Threshold Level (ETL) is crossed
ETL: The pest population level at which control becomes economically justified — below ETL, damage cost is less than control cost.
Soil pH and Its Importance
| pH Range | Soil Type | Effect |
|---|---|---|
| Below 6 | Acidic | Aluminium/manganese toxicity, reduced nutrient availability |
| 6.5–7.5 | Optimal | Maximum nutrient availability for most crops |
| Above 8 | Alkaline/Saline | Iron, zinc, manganese deficiency; sodicity problems |
Correction: Acidic soils → lime (calcium carbonate). Alkaline soils → gypsum (calcium sulphate).
Alternate Bearing in Mango
Q: What is alternate bearing and how is it managed?
Alternate bearing = heavy fruiting one year followed by very light or no fruiting the next year. Common in mango.
Cause: Heavy crop depletes tree reserves (carbohydrates, nutrients); tree cannot flower again the following season.
Management:
- Paclobutrazol soil drench — reduces vegetative growth, promotes flowering
- Smudging (controlled smoke) — stimulates uniform flowering
- Pruning after harvest — removes excess vegetative shoots
- Proper nutrition (K, B supplementation post-harvest)
For horticulture, animal husbandry, and fisheries questions, see Horticulture & Animal Husbandry. For the overview agriculture lesson covering IPM, crop seasons, and animal husbandry in less depth, see Agriculture Technical Questions. Check IBPS AFO previous year question analysis for which technical topics panels ask most. Verify the IBPS AFO syllabus for the full technical scope. IBPS notifications are at www.ibps.in.
Frequently Asked Questions
Q: What agronomy questions are asked in IBPS AFO interviews? High-frequency questions: What are Kharif and Rabi crops with examples? What is Integrated Pest Management and its hierarchy? What is crop rotation and why is it practised? What is alternate bearing in mango and how is it managed with Paclobutrazol? What is the significance of the Norin 10 gene in the Green Revolution? Panels probe both definition and practical application.
Q: What are the 12 parameters of the Soil Health Card scheme? The 12 SHC parameters across four categories: Basic (pH, Electrical Conductivity, Organic Carbon), Macro Nutrients (N, P, K), Secondary Nutrient (Sulphur), and Micro Nutrients (Zinc, Iron, Copper, Manganese, Boron). Know them by category, not as a single list. EC measures soil salinity; low OC (below 0.5%) indicates degraded soil that responds poorly to fertilizers.
Q: What is Khaira disease in rice and what causes it? Khaira disease in rice is caused by Zinc (Zn) deficiency. Symptoms include yellowing of leaves and stunted growth. It is a staple panel question — "Khaira disease in rice = Zinc deficiency" is one of the most tested nutrient-deficiency linkages in IBPS AFO technical rounds.
Q: What is the significance of Norin 10 gene in Indian agriculture? Norin 10 was a Japanese semi-dwarf wheat variety carrying the Rht (reduced height) gene. Norman Borlaug incorporated it into Mexican wheat varieties. These semi-dwarf wheats were introduced to India as Sonora 64 and Lerma Rojo — the foundation of India's Green Revolution wheat production and subsequent self-sufficiency in food grains.