INDIAN BANKING RADAR (IBR) - IBPS AFO MAINS — AGRICULTURE INTELLIGENCE MOCK

🔥 PLATINUM SERIES 2.0 | VOL. 216

📅 SATURDAY, 31 OCTOBER 2026

🎯 TARGET EXAMINATION

IBPS AFO Mains — Professional Knowledge

Other Agriculture and Banking Competitive Examinations

📝 20 QUESTIONS | 20 MARKS | 15 MINUTES

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AGRICULTURE INTELLIGENCE MOCK — 20 MCQs

Q1. Which method is most suitable for overcoming physical dormancy caused by a hard, water-impermeable seed coat:

A. Cold stratification

B. Vernalisation

C. Mechanical scarification

D. Seed priming with water only

E. Removal of the embryo

Q2. Which enzyme initially fixes carbon dioxide in the C₄ photosynthetic pathway:

A. Phosphoenolpyruvate carboxylase

B. Ribulose-1,5-bisphosphate carboxylase/oxygenase

C. Nitrate reductase

D. Nitrogenase

E. ATP synthase

Q3. Cytoplasmic male sterility (CMS) is particularly useful in agriculture for:

A. Increasing seed dormancy

B. Preventing seed germination

C. Improving soil phosphorus availability

D. Controlling viral diseases

E. Facilitating hybrid seed production

Q4. In strongly acidic soils, phosphorus availability may be reduced mainly because of fixation by:

A. Sodium and potassium compounds

B. Iron and aluminium compounds

C. Calcium carbonate alone

D. Magnesium sulphate alone

E. Chloride salts

Q5. A farmer incurs a total production cost of ₹60,000 per hectare. If the produce sells for ₹3,000 per quintal, what is the break-even yield per hectare, assuming the entire produce is sold at that price:

A. 10 quintals

B. 15 quintals

C. 18 quintals

D. 20 quintals

E. 25 quintals

Q6. In integrated pest management, the Economic Threshold Level (ETL) indicates the pest population level at which:

A. Control measures should be initiated to prevent the population reaching the economic injury level

B. The crop must always be destroyed

C. Pesticide application becomes permanently unnecessary

D. All beneficial insects should be eliminated

E. Harvesting must immediately begin

Q7. Root-knot disease in many agricultural crops is commonly caused by nematodes belonging to which genus:

A. Puccinia

B. Xanthomonas

C. Meloidogyne

D. Fusarium

E. Rhizobium

Q8. Apple bitter pit is a physiological disorder commonly associated with inadequate calcium in fruit tissues and related nutrient imbalances. Which nutrient is most directly associated with this disorder:

A. Nitrogen

B. Phosphorus

C. Potassium

D. Sulphur

E. Calcium

Q9. Which combination is characteristic of the System of Rice Intensification (SRI), subject to local adaptation:

A. Dense transplanting of old seedlings under continuous deep flooding

B. Transplanting young seedlings with wider spacing and carefully managed water

C. Broadcasting sprouted rice into deep standing water in every situation

D. Maintaining permanent deep flooding throughout the crop cycle

E. Avoiding all forms of weed management

Q10. Incorporation of crop residues with a high carbon-to-nitrogen ratio may initially cause:

A. Immediate and permanent elimination of soil nitrogen

B. Complete prevention of microbial activity

C. Permanent conversion of all soil nitrogen into nitrate

D. Temporary immobilisation of available soil nitrogen by microorganisms

E. Immediate cessation of residue decomposition

Q11. Which process is used to preserve green fodder through controlled fermentation under anaerobic conditions:

A. Ensiling

B. Winnowing

C. Threshing

D. Ginning

E. Parboiling

Q12. Which is a common effect of severe heat stress in dairy cattle:

A. Unrestricted feed intake

B. Guaranteed increase in milk fat percentage

C. Reduced feed intake and a possible decline in milk production

D. Complete elimination of water requirements

E. Permanent improvement in reproductive performance

Q13. In agricultural field experiments, randomisation primarily helps to:

A. Ensure that every treatment produces the same yield

B. Eliminate the need for replication

C. Guarantee that experimental errors are zero

D. Prevent all environmental variation

E. Reduce allocation bias and support valid statistical inference

Q14. Dissolved oxygen in aquaculture water is essential primarily for:

A. Increasing water salinity

B. Respiration of cultured fish

C. Raising water hardness in every system

D. Preventing all fish diseases

E. Eliminating the need for water-quality monitoring

Q15. Which agricultural implement places seeds in rows at a relatively uniform depth and spacing:

A. Disc harrow

B. Land leveller

C. Cultivator

D. Seed drill

E. Mouldboard plough

Q16. Applying agricultural lime to an acidic soil primarily helps to:

A. Increase soil acidity

B. Increase exchangeable aluminium toxicity

C. Neutralise acidity and reduce aluminium toxicity

D. Eliminate the need for all fertilisers

E. Convert every soil nutrient into an unavailable form

Q17. The primary purpose of maintaining prescribed isolation distance during seed production is to:

A. Reduce unwanted cross-pollination and help maintain genetic purity

B. Increase seed moisture during storage

C. Improve the colour of harvested seeds

D. Eliminate the need for field inspection

E. Prevent all insect pests from entering the field

Q18. Which irrigation method delivers water in small quantities near the plant root zone through emitters:

A. Wild flooding

B. Check-basin irrigation

C. Uncontrolled furrow irrigation

D. Overhead flooding

E. Drip irrigation

Q19. Which combination can help farmers reduce avoidable distress sales and improve marketing opportunities:

A. Selling all produce immediately without assessing market conditions

B. Appropriate storage, grading and access to organised markets

C. Avoiding all post-harvest handling

D. Ignoring quality standards

E. Eliminating market-price information

Q20. A farmer uses 12 litres of spray solution to cover 0.2 hectare. What is the spray-volume application rate per hectare:

A. 12 litres/ha

B. 24 litres/ha

C. 40 litres/ha

D. 60 litres/ha

E. 120 litres/ha

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🔑 ANSWER KEY

Q1.C

Q2.A

Q3.E

Q4.B

Q5.D

Q6.A

Q7.C

Q8.E

Q9.B

Q10.D

Q11.A

Q12.C

Q13.E

Q14.B

Q15.D

Q16.C

Q17.A

Q18.E

Q19.B

Q20.D

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📚 DETAILED EXPLANATIONS & LEARNING POINTS

Q1. Correct Answer: C — Mechanical scarification

Mechanical scarification weakens or breaks the impermeable seed coat, allowing water and oxygen to enter. It is useful for seeds exhibiting physical dormancy. Treatment must be appropriate to the species to avoid embryo damage.

Q2. Correct Answer: A — Phosphoenolpyruvate carboxylase

In C₄ plants, PEP carboxylase initially fixes carbon dioxide into a four-carbon compound, oxaloacetate. This mechanism helps concentrate CO₂ around Rubisco and reduces photorespiration under suitable environmental conditions.

Q3. Correct Answer: E — Facilitating hybrid seed production

Cytoplasmic male sterility prevents the production of functional pollen in the male-sterile parent. It helps simplify hybrid seed production by reducing the need for manual removal of anthers in many crops.

Q4. Correct Answer: B — Iron and aluminium compounds

In acidic soils, phosphorus can react with iron and aluminium compounds, reducing its availability to plants. Appropriate soil management, including suitable liming and phosphorus fertilisation, can help improve phosphorus availability.

Q5. Correct Answer: D — 20 quintals/ha

Break-even yield = Total production cost ÷ Selling price per quintal.

= ₹60,000 ÷ ₹3,000

= 20 quintals per hectare

This assumes all produce is sold at the stated price and the stated cost is the total cost to be recovered.

Q6. Correct Answer: A — Initiate control measures

The Economic Threshold Level is the pest population level at which management action should begin to prevent the population from reaching the Economic Injury Level. The ETL and Economic Injury Level are related but are not interchangeable.

Q7. Correct Answer: C — Meloidogyne

Meloidogyne species are plant-parasitic nematodes that cause characteristic root galls. Infected plants may show stunted growth, wilting and reduced nutrient uptake.

Q8. Correct Answer: E — Calcium

Apple bitter pit is a physiological disorder associated with inadequate calcium in fruit tissues and factors affecting calcium distribution. Fruit maturity, crop load, water management and nutrient balance can also influence its occurrence.

Q9. Correct Answer: B — Young seedlings, wider spacing and managed water

SRI commonly uses young seedlings, careful transplanting, wider spacing and water management that avoids unnecessary continuous flooding. Practices are adapted to local soil, climate and production conditions.

Q10. Correct Answer: D — Temporary nitrogen immobilisation

Microorganisms decomposing residues rich in carbon relative to nitrogen may temporarily use available soil nitrogen. This process is called nitrogen immobilisation. The nitrogen can become available again as microbial biomass and residues decompose.

Q11. Correct Answer: A — Ensiling

Ensiling preserves green fodder by fermentation under oxygen-limited conditions. Proper compaction, exclusion of air and suitable moisture are important for producing good-quality silage.

Q12. Correct Answer: C — Reduced feed intake and possible decline in milk production

Heat stress can reduce feed intake and alter the animal's metabolism, leading to lower milk production and reproductive performance. Shade, ventilation, adequate drinking water and appropriate cooling measures help reduce heat stress.

Q13. Correct Answer: E — Reduce allocation bias

Randomisation assigns treatments by chance, helping reduce systematic bias. When combined with replication and appropriate experimental design, it supports reliable comparison of treatment effects.

Q14. Correct Answer: B — Respiration of cultured fish

Fish require dissolved oxygen for respiration. Low dissolved oxygen can cause stress, poor growth and mortality. Oxygen levels should be monitored and managed according to the cultured species and stocking density.

Q15. Correct Answer: D — Seed drill

A seed drill places seeds in rows at a relatively uniform depth and spacing. It can improve crop establishment, facilitate intercultural operations and reduce seed wastage compared with indiscriminate broadcasting.

Q16. Correct Answer: C — Neutralise acidity and reduce aluminium toxicity

Agricultural lime raises the pH of acidic soils and can reduce the toxicity of exchangeable aluminium. The lime requirement should be determined from soil testing and the characteristics of the soil and liming material.

Q17. Correct Answer: A — Reduce unwanted cross-pollination

Isolation distance helps maintain genetic purity by limiting unwanted cross-pollination between seed-production fields and nearby compatible varieties or related crops. The prescribed distance depends on the crop, seed class and applicable certification standards.

Q18. Correct Answer: E — Drip irrigation

Drip irrigation supplies water close to the plant root zone through emitters. When properly designed and maintained, it can reduce evaporation and conveyance losses and improve water-use efficiency.

Q19. Correct Answer: B — Storage, grading and organised markets

Suitable storage can allow farmers to avoid selling immediately after harvest when prices are unfavourable. Grading and access to organised markets can improve marketing options, although the actual benefit depends on storage costs, market access, prices and farmers' liquidity needs.

Q20. Correct Answer: D — 60 litres/ha

Spray volume per hectare = Total spray solution used ÷ Area covered.

= 12 litres ÷ 0.2 hectare

= 60 litres per hectare

This represents the spray-solution volume, not the pesticide dose. The pesticide quantity must be calculated separately according to its recommended application rate.

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⚡ FINAL REVISION CAPSULE

🌱 Seed Science: Mechanical scarification helps overcome hard-seed-coat dormancy.

🌿 Plant Physiology: PEP carboxylase initiates carbon fixation in the C₄ pathway.

🌾 Plant Breeding: CMS supports hybrid seed production; isolation distance helps maintain genetic purity.

🧪 Soil Science: Iron and aluminium compounds can fix phosphorus in acidic soils; lime reduces soil acidity and aluminium toxicity.

🐛 Plant Protection: ETL guides timely pest management; Meloidogyne causes root-knot disease.

🍎 Horticulture: Apple bitter pit is associated with inadequate calcium in fruit tissues and related factors.

🌾 Crop Production: SRI uses modified transplanting and water-management practices; high C:N residues can temporarily immobilise nitrogen.

🐄 Animal Husbandry: Heat stress can reduce feed intake and milk production.

🐟 Fisheries: Dissolved oxygen is essential for fish respiration.

🚜 Farm Machinery: A seed drill places seeds in rows; sprayer calibration determines spray volume per unit area.

💧 Water Management: Drip irrigation delivers water near the root zone.

📊 Farm Management: Break-even yield = Total cost ÷ Price per unit.

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🎯 SELF-ASSESSMENT

🏆 18–20 correct: Excellent — AFO Mains Ready

🥇 15–17 correct: Very Good — Revise minor gaps

📘 11–14 correct: Good — Strengthen core concepts

📚 Below 11: Revisit explanations and attempt again

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📢 YOUR AGRICULTURE EXAM PREPARATION PARTNER

✅ Attempt the mock within 15 minutes.

✅ Review every incorrect answer.

✅ Revise the learning points before your next attempt.

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