Crop Production (Kharif & Rabi)–MCQ Series 14

By Skumar

 

 Crop Production (Kharif & Rabi)–MCQ Series 14

🌻 SUNFLOWER 

Crop Production | ICAR Pattern

A. Origin, Botany & Classification (1–10)

1. Sunflower belongs to which family?
A. Fabaceae
B. Brassicaceae
C. Asteraceae
D. Malvaceae

✅ Answer: C
📝 Explanation: Sunflower (Helianthus annuus) belongs to Asteraceae (Compositae).

2. Botanical name of sunflower is:
A. Brassica juncea
B. Helianthus annuus
C. Carthamus tinctorius
D. Glycine max

✅ Answer: B

3. Centre of origin of sunflower:
A. Africa
B. South America
C. North America
D. Central Asia

✅ Answer: C

4. Sunflower is mainly grown for:
A. Fibre
B. Oil
C. Sugar
D. Starch

✅ Answer: B

5. Type of inflorescence in sunflower:
A. Spike
B. Panicle
C. Capitulum (Head)
D. Umbel

✅ Answer: C

6. Pollination in sunflower is:
A. Self-pollinated
B. Cross-pollinated
C. Often cross-pollinated
D. Apomictic

✅ Answer: C

7. Economic part of sunflower:
A. Leaf
B. Stem
C. Seed
D. Flower

✅ Answer: C

8. Sunflower oil is rich in:
A. Saturated fatty acids
B. Linoleic acid
C. Lauric acid
D. Erucic acid

✅ Answer: B

9. Chromosome number of sunflower:
A. 2n = 14
B. 2n = 24
C. 2n = 34
D. 2n = 42

✅ Answer: C

10. Sunflower is classified as:
A. C3 plant
B. C4 plant
C. CAM plant
D. Halophyte

✅ Answer: A

B. Climate & Soil (11–20)

11. Ideal temperature for sunflower growth:
A. 10–15°C
B. 15–20°C
C. 20–30°C
D. 35–45°C

✅ Answer: C

12. Sunflower is tolerant to:
A. Frost
B. Salinity
C. Drought
D. Waterlogging

✅ Answer: C

13. Best soil for sunflower cultivation:
A. Sandy soil
B. Alluvial loam
C. Heavy clay
D. Saline soil

✅ Answer: B

14. Ideal soil pH range for sunflower:
A. 4.5–5.5
B. 5.0–6.0
C. 6.0–7.5
D. 8.0–9.0

✅ Answer: C

15. Sunflower requires annual rainfall of:
A. 300–400 mm
B. 400–600 mm
C. 600–800 mm
D. >1000 mm

✅ Answer: B

16. Sunflower is sensitive to:
A. Moisture stress at seedling stage
B. Excess nitrogen
C. Frost at flowering
D. Waterlogging

✅ Answer: D

17. Sunflower is grown in India as:
A. Only Kharif crop
B. Only Rabi crop
C. Kharif, Rabi & summer crop
D. Perennial crop

✅ Answer: C

18. Sunflower prefers:
A. Short day conditions
B. Long day conditions
C. Day neutral
D. Shade

✅ Answer: C

19. Sunflower shows heliotropism at:
A. Seedling stage
B. Vegetative stage
C. Bud stage
D. Maturity stage

✅ Answer: C

20. Excess rainfall during flowering causes:
A. Higher oil content
B. Poor pollination
C. Early maturity
D. Larger heads

✅ Answer: B

C. Sowing, Varieties & Nutrient Management (21–35)

21. Sowing time of sunflower (Kharif):
A. March–April
B. April–May
C. June–July
D. August–September

✅ Answer: C

22. Recommended seed rate for sunflower:
A. 3–4 kg/ha
B. 5–6 kg/ha
C. 8–10 kg/ha
D. 12–15 kg/ha

✅ Answer: B

23. Spacing for sunflower (Kharif):
A. 30 × 10 cm
B. 45 × 15 cm
C. 60 × 30 cm
D. 75 × 45 cm

✅ Answer: C

24. Recommended NPK dose (kg/ha) for sunflower:
A. 40:20:20
B. 60:30:30
C. 60:40:40
D. 80:60:40

✅ Answer: C

25. Nitrogen application in sunflower is done in:
A. One split
B. Two splits
C. Three splits
D. Foliar spray only

✅ Answer: B

26. Sulphur requirement of sunflower is:
A. Low
B. Medium
C. High
D. Not required

✅ Answer: C

27. Deficiency of boron in sunflower causes:
A. Chlorosis
B. Head deformity
C. Poor root growth
D. Lodging

✅ Answer: B

28. Sunflower responds well to:
A. Zinc
B. Boron
C. Sulphur
D. All of the above

✅ Answer: D

29. Hybrid sunflower is preferred because of:
A. Early maturity
B. Higher oil content
C. Higher yield
D. All of the above

✅ Answer: D

30. Pollination in sunflower is enhanced by:
A. Wind
B. Water
C. Bees
D. Birds

✅ Answer: C

D. Weed, Pest, Disease, Harvest & Yield (36–50)

31. Critical period of weed competition in sunflower:
A. 0–15 DAS
B. 15–30 DAS
C. 20–45 DAS
D. 45–60 DAS

✅ Answer: C

32. Common weed in sunflower:
A. Cyperus rotundus
B. Echinochloa spp.
C. Amaranthus spp.
D. All of the above

✅ Answer: D

33. Major insect pest of sunflower:
A. Aphid
B. Capitulum borer
C. Whitefly
D. Thrips

✅ Answer: B

34. Major disease of sunflower:
A. Downy mildew
B. Alternaria leaf spot
C. Rust
D. All of the above

✅ Answer: D

35. Sunflower matures in:
A. 60–70 days
B. 80–90 days
C. 90–120 days
D. 130–150 days

✅ Answer: C

36. Sunflower is harvested when:
A. Leaves are green
B. Back of head turns yellow
C. Seeds are soft
D. Plants lodge

✅ Answer: B

37. Early harvesting of sunflower results in:
A. Low oil content
B. Shriveled seeds
C. Lower yield
D. All of the above

✅ Answer: D

38. Late harvesting leads to:
A. Seed shattering
B. Bird damage
C. Reduced quality
D. All of the above

✅ Answer: D

39. Average yield of sunflower:
A. 8–10 q/ha
B. 10–15 q/ha
C. 15–20 q/ha
D. 25–30 q/ha

✅ Answer: C

40. Oil content in sunflower seed:
A. 20–25%
B. 30–35%
C. 38–45%
D. >50%

✅ Answer: C

41. Sunflower oil is preferred because:
A. High PUFA
B. Low cholesterol
C. Good keeping quality
D. All of the above

✅ Answer: D

42. Sunflower stalks are used as:
A. Fuel
B. Fodder
C. Paper pulp
D. All of the above

✅ Answer: D

43. Major sunflower producing state in India:
A. Punjab
B. Karnataka
C. Assam
D. Odisha

✅ Answer: B

44. Sunflower fits well in cropping system due to:
A. Short duration
B. Wide adaptability
C. Low water requirement
D. All of the above

✅ Answer: D

45. Sunflower is important because:
A. Edible oil security
B. Farmer income
C. Industrial use
D. All of the above

✅ Answer: D

46. Sunflower shows head drooping at:
A. Vegetative stage
B. Bud stage
C. Flowering stage
D. Maturity stage

✅ Answer: D

47. Best moisture stage for sunflower is:
A. Germination
B. Flowering
C. Seed filling
D. Both B & C

✅ Answer: D

48. Moisture stress during seed filling causes:
A. Higher oil content
B. Reduced yield
C. Larger head
D. Delayed maturity

✅ Answer: B

49. Sunflower is considered as:
A. Heavy feeder
B. Light feeder
C. Medium feeder
D. Exhaustive crop

✅ Answer: C

50. Sunflower contributes to sustainable agriculture because:
A. Fits in multiple seasons
B. Improves farm income
C. Oilseed diversification
D. All of the above

✅ Answer: D


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