🔵 1. Which of the following is the most abundant greenhouse gas in the Earth's atmosphere?
A) Methane
B) Carbon dioxide
C) Nitrous oxide
D) Water vapour
Answer: D) Water vapour
Rationale: Water vapour is naturally the most abundant and contributes to the greenhouse effect.
🔵 2. The term “Green Revolution” in India is associated with which crop?
A) Rice
B) Wheat
C) Maize
D) Cotton
Answer: B) Wheat
Rationale: The Green Revolution in India significantly boosted wheat production.
🔵 3. Which soil is best suited for cotton cultivation?
A) Alluvial soil
B) Black soil
C) Laterite soil
D) Red soil
Answer: B) Black soil
Rationale: Black soil retains moisture and is ideal for cotton.
🔵 4. Krishi Vigyan Kendras (KVKs) are managed by:
A) NABARD
B) ICAR
C) FCI
D) Ministry of Rural Development
Answer: B) ICAR
Rationale: KVKs are agricultural science centers under ICAR for farmer training.
🔵 5. First genetically modified crop approved in India:
A) Bt Brinjal
B) Bt Cotton
C) Bt Corn
D) Golden Rice
Answer: B) Bt Cotton
Rationale: Approved in 2002 for commercial cultivation.
🔵 6. Which is a Rabi crop?
A) Rice
B) Maize
C) Wheat
D) Bajra
Answer: C) Wheat
Rationale: Wheat is grown in the winter season (Rabi).
🔵 7. Nutrient responsible for leaf development in plants is:
A) Potassium
B) Nitrogen
C) Phosphorus
D) Iron
Answer: B) Nitrogen
Rationale: Nitrogen is essential for chlorophyll and vegetative growth.
🔵 8. Soil pH indicates:
A) Salinity
B) Alkalinity
C) Acidity or alkalinity
D) Organic matter
Answer: C) Acidity or alkalinity
Rationale: It shows the hydrogen ion concentration in soil.
🔵 9. India’s largest sugarcane-producing state is:
A) Maharashtra
B) Karnataka
C) Uttar Pradesh
D) Tamil Nadu
Answer: C) Uttar Pradesh
Rationale: Uttar Pradesh has the highest sugarcane area and yield.
🔵 10. Pusa Basmati-1 is a variety of:
A) Wheat
B) Rice
C) Maize
D) Sorghum
Answer: B) Rice
Rationale: It's a high-yielding aromatic rice variety.
🔵 11. Father of Indian Green Revolution:
A) Verghese Kurien
B) M.S. Swaminathan
C) C. Subramaniam
D) Norman Borlaug
Answer: B) M.S. Swaminathan
Rationale: He led the green revolution efforts in India.
🔵 12. Which nutrient improves disease resistance in crops?
A) Nitrogen
B) Potassium
C) Calcium
D) Magnesium
Answer: B) Potassium
Rationale: Potassium strengthens plant immunity.
🔵 13. The ideal C:N ratio for composting is:
A) 10:1
B) 20:1
C) 30:1
D) 40:1
Answer: C) 30:1
Rationale: It balances microbial activity and decomposition.
🔵 14. Which is not a micronutrient?
A) Boron
B) Iron
C) Zinc
D) Calcium
Answer: D) Calcium
Rationale: Calcium is a secondary nutrient, not a micronutrient.
🔵 15. Urea contains how much nitrogen?
A) 26%
B) 30%
C) 46%
D) 50%
Answer: C) 46%
Rationale: Urea has the highest N content among solid fertilizers.
🔵 16. Biofertilizer for nitrogen fixation in legumes:
A) Azospirillum
B) Azotobacter
C) Rhizobium
D) Phosphobacteria
Answer: C) Rhizobium
Rationale: Rhizobium fixes nitrogen symbiotically in legumes.
🔵 17. Seed replacement rate refers to:
A) Germination speed
B) Crop rotation
C) Use of certified seeds
D) Number of seed varieties
Answer: C) Use of certified seeds
Rationale: Higher SRR ensures better yields and quality.
🔵 18. Drip irrigation is best suited for:
A) Rice
B) Sugarcane
C) Cotton
D) Vegetables
Answer: D) Vegetables
Rationale: It saves water and increases efficiency in horticulture.
🔵 19. Which crop requires the highest water input?
A) Groundnut
B) Rice
C) Maize
D) Wheat
Answer: B) Rice
Rationale: Rice is a water-intensive crop due to its puddling requirements.
🔵 20. What is vermicompost?
A) Chemical fertilizer
B) Green manure
C) Compost made with earthworms
D) Liquid manure
Answer: C) Compost made with earthworms
Rationale: It uses earthworms for organic waste decomposition.
🔵 21. Which of the following is an oilseed crop?
A) Barley
B) Soybean
C) Maize
D) Pearl millet
Answer: B) Soybean
Rationale: Soybean is cultivated for oil extraction.
🔵 22. National Food Security Mission (NFSM) was launched in:
A) 2000
B) 2007
C) 2010
D) 2015
Answer: B) 2007
Rationale: NFSM aimed to increase production of rice, wheat, and pulses.
🔵 23. Which gas is released from flooded paddy fields?
A) Nitrogen
B) Oxygen
C) Methane
D) Hydrogen
Answer: C) Methane
Rationale: Anaerobic decomposition releases methane in waterlogged soils.
🔵 24. India's national agriculture market portal is called:
A) KrishiNet
B) AgriIndia
C) eNAM
D) KisanConnect
Answer: C) eNAM
Rationale: eNAM integrates agricultural mandis for online trade.
🔵 25. Trickle irrigation is also known as:
A) Canal irrigation
B) Sprinkler irrigation
C) Drip irrigation
D) Furrow irrigation
Answer: C) Drip irrigation
Rationale: It delivers water directly to plant roots.
🔵 26. Which crop is used for green manuring?
A) Cotton
B) Sunhemp
C) Maize
D) Wheat
Answer: B) Sunhemp
Rationale: Sunhemp improves soil fertility when incorporated as green manure.
🔵 27. Integrated Pest Management (IPM) aims at:
A) Maximum pesticide use
B) Total pest eradication
C) Eco-friendly pest control
D) Minimum yields
Answer: C) Eco-friendly pest control
Rationale: IPM balances pest control with environmental safety.
🔵 28. Which of these is a kharif crop?
A) Gram
B) Wheat
C) Rice
D) Mustard
Answer: C) Rice
Rationale: Rice is sown in monsoon (June–July).
🔵 29. Which micronutrient prevents ‘Khaira’ disease in rice?
A) Zinc
B) Iron
C) Boron
D) Copper
Answer: A) Zinc
Rationale: Zinc deficiency causes Khaira in rice plants.
🔵 30. The process of adding lime to soil is known as:
A) Leaching
B) Flocculation
C) Liming
D) Acidification
Answer: C) Liming
Rationale: Liming corrects soil acidity by raising pH.
🔵 31. Which crop is most sensitive to waterlogging?
A) Rice
B) Sugarcane
C) Maize
D) Jute
Answer: C) Maize
Rationale: Maize is highly sensitive to excessive moisture, which affects root respiration.
🔵 32. What is the optimum temperature for wheat germination?
A) 10–15°C
B) 15–20°C
C) 20–25°C
D) 25–30°C
Answer: A) 10–15°C
Rationale: Wheat requires cool temperatures for uniform and successful germination.
🔵 33. Which Indian institute develops new crop varieties?
A) NABARD
B) ICRISAT
C) IARI
D) NITI Aayog
Answer: C) IARI
Rationale: Indian Agricultural Research Institute is responsible for breeding high-yielding varieties.
🔵 34. Which fertilizer is known as muriate of potash?
A) Urea
B) SSP
C) MOP
D) DAP
Answer: C) MOP
Rationale: MOP is the common name for potassium chloride, a potassium fertilizer.
🔵 35. What is the isolation distance for certified maize seed production?
A) 50 m
B) 100 m
C) 200 m
D) 400 m
Answer: D) 400 m
Rationale: Cross-pollinated crops like maize require large isolation distances to maintain purity.
🔵 36. Which crop has epigeal germination?
A) Rice
B) Maize
C) Groundnut
D) Wheat
Answer: C) Groundnut
Rationale: In epigeal germination, cotyledons rise above the soil surface as in groundnut.
🔵 37. The swelling of seeds when soaked in water is due to:
A) Respiration
B) Imbibition
C) Osmosis
D) Transpiration
Answer: B) Imbibition
Rationale: Imbibition is the initial water absorption by dry seeds, causing swelling.
🔵 38. Which of the following is a pulse crop?
A) Sorghum
B) Lentil
C) Jowar
D) Sugarcane
Answer: B) Lentil
Rationale: Lentil is a legume cultivated for its protein-rich seeds.
🔵 39. The term “Transpiration” refers to:
A) Water absorption
B) Water loss through roots
C) Water loss through stomata
D) Water movement in xylem
Answer: C) Water loss through stomata
Rationale: Transpiration is the evaporation of water from plant leaves via stomata.
🔵 40. The critical stage for irrigation in wheat is:
A) Crown root initiation
B) Tillering
C) Flowering
D) Milking
Answer: A) Crown root initiation
Rationale: Lack of water at this stage severely affects yield.
🔵 41. The headquarters of ICAR is located in:
A) Hyderabad
B) Pune
C) New Delhi
D) Bhopal
Answer: C) New Delhi
Rationale: ICAR is headquartered in New Delhi and coordinates agricultural research in India.
🔵 42. Most important weed in wheat fields is:
A) Parthenium
B) Phalaris minor
C) Cyperus rotundus
D) Amaranthus
Answer: B) Phalaris minor
Rationale: Also known as “gulli danda,” it competes with wheat for resources.
🔵 43. Which crop is known as the “Queen of Cereals”?
A) Rice
B) Maize
C) Sorghum
D) Wheat
Answer: B) Maize
Rationale: Maize is called the “Queen of Cereals” due to its high productivity and versatile uses.
🔵 44. The deficiency of which element causes chlorosis in young leaves?
A) Nitrogen
B) Iron
C) Calcium
D) Boron
Answer: B) Iron
Rationale: Iron deficiency leads to interveinal chlorosis in younger leaves due to its immobility.
🔵 45. The largest producer of pulses in India is:
A) Maharashtra
B) Madhya Pradesh
C) Rajasthan
D) Karnataka
Answer: B) Madhya Pradesh
Rationale: M.P. has the maximum area and production of pulses in India.
🔵 46. Which crop is most suitable for dryland farming?
A) Sugarcane
B) Paddy
C) Pearl millet
D) Jute
Answer: C) Pearl millet
Rationale: Pearl millet tolerates drought and thrives in arid regions.
🔵 47. Which one is a photoperiod-sensitive crop?
A) Wheat
B) Potato
C) Rice
D) Tomato
Answer: C) Rice
Rationale: Flowering in rice is influenced by day length, making it photoperiod-sensitive.
🔵 48. The process of covering seeds with insecticides or fungicides is called:
A) Pelleting
B) Scarification
C) Seed treatment
D) Stratification
Answer: C) Seed treatment
Rationale: Seed treatment protects seeds from pests and diseases during germination.
🔵 49. What is the function of gibberellins in plants?
A) Promote dormancy
B) Induce flowering
C) Promote stem elongation
D) Inhibit growth
Answer: C) Promote stem elongation
Rationale: Gibberellins stimulate cell elongation and break seed dormancy.
🔵 50. Which organization regulates the use of pesticides in India?
A) ICAR
B) CPCB
C) FSSAI
D) CIBRC
Answer: D) CIBRC
Rationale: The Central Insecticides Board and Registration Committee oversees pesticide regulation.
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