Crop Production (Kharif & Rabi) – MCQ Series 7

By Skumar

Crop Production (Kharif & Rabi) –MCQ Series 7

Sorghum (Jowar) 

Crop Production (Kharif & Rabi) | ICAR Pattern

A. General & Botany (MCQs 1–10)

1. Botanical name of sorghum is:
A. Zea mays
B. Sorghum bicolor
C. Pennisetum glaucum
D. Setaria italica

✅ Answer: B
📝 Explanation: Sorghum belongs to family Poaceae; species Sorghum bicolor.

2. Sorghum is primarily a:
A. C3 crop
B. C4 crop
C. CAM crop
D. C2 crop

✅ Answer: B
📝 Explanation: Sorghum follows C4 pathway, hence high photosynthetic efficiency and drought tolerance.

3. Origin of sorghum is:
A. India
B. China
C. Africa
D. Mexico

✅ Answer: C
📝 Explanation: Sorghum originated in tropical Africa (Ethiopia–Sudan region).

4. Sorghum is mainly grown as:
A. Oilseed crop
B. Fibre crop
C. Cereal crop
D. Pulse crop

✅ Answer: C

5. Chromosome number of sorghum is:
A. 2n = 10
B. 2n = 14
C. 2n = 20
D. 2n = 40

✅ Answer: C
📝 Explanation: Sorghum has 2n = 20 chromosomes.

6. Inflorescence of sorghum is:
A. Spike
B. Panicle
C. Raceme
D. Umbel

✅ Answer: B

7. Sorghum grain is botanically a:
A. Berry
B. Drupe
C. Caryopsis
D. Nut

✅ Answer: C

8. Sorghum is mainly pollinated by:
A. Insects
B. Wind
C. Water
D. Self-pollination only

✅ Answer: B
📝 Explanation: Sorghum is often cross-pollinated due to wind.

9. The edible part of sorghum grain is:
A. Pericarp
B. Aleurone
C. Endosperm
D. Embryo

✅ Answer: C

10. Sorghum belongs to which tribe?
A. Triticeae
B. Andropogoneae
C. Paniceae
D. Oryzeae

✅ Answer: B

B. Climate & Soil (MCQs 11–20)

11. Optimum temperature for sorghum growth is:
A. 10–15°C
B. 15–20°C
C. 25–35°C
D. >40°C

✅ Answer: C

12. Sorghum is best suited to:
A. High rainfall areas
B. Waterlogged soils
C. Semi-arid tropics
D. Coastal regions

✅ Answer: C

13. Sorghum tolerates drought mainly due to:
A. Shallow roots
B. Thick cuticle & C4 pathway
C. Low transpiration only
D. High protein content

✅ Answer: B

14. Best soil for sorghum cultivation is:
A. Sandy soil
B. Laterite soil
C. Black cotton soil
D. Peaty soil

✅ Answer: C

15. Ideal soil pH for sorghum is:
A. 4.0–5.0
B. 5.0–6.0
C. 6.5–8.5
D. >9.0

✅ Answer: C

16. Sorghum is moderately tolerant to:
A. Flooding
B. Salinity
C. Acidity
D. Frost

✅ Answer: B

17. Crop fails under:
A. Moisture stress
B. Low fertility
C. Waterlogging
D. High temperature

✅ Answer: C

18. Sorghum requires annual rainfall of:
A. 300–400 mm
B. 400–700 mm
C. 1000–1500 mm
D. >2000 mm

✅ Answer: B

19. Sorghum is sensitive to:
A. Drought
B. Heat
C. Frost
D. Alkalinity

✅ Answer: C

20. Soil depth requirement of sorghum is:
A. Shallow
B. Medium to deep
C. Very shallow
D. Marshy

✅ Answer: B

C. Varieties, Sowing & Seed (MCQs 21–30)

21. Recommended seed rate for grain sorghum is:
A. 5–7 kg/ha
B. 8–10 kg/ha
C. 12–15 kg/ha
D. 20–25 kg/ha

✅ Answer: C

22. Kharif sorghum sowing time is:
A. February–March
B. April–May
C. June–July
D. September–October

✅ Answer: C

23. Rabi sorghum is also known as:
A. Desi jowar
B. Maldandi jowar
C. Hybrid jowar
D. Sweet sorghum

✅ Answer: B

24. Ideal spacing for sorghum is:
A. 15 × 10 cm
B. 30 × 10 cm
C. 45 × 15 cm
D. 60 × 30 cm

✅ Answer: C

25. Sorghum is generally sown by:
A. Broadcasting
B. Transplanting
C. Drilling / Dibbling
D. Ridge planting only

✅ Answer: C

26. Seed treatment recommended for sorghum is:
A. Carbendazim
B. Thiram or Captan
C. Mancozeb
D. Bordeaux mixture

✅ Answer: B

27. Improved sorghum varieties are developed mainly by:
A. IARI
B. ICRISAT
C. CIMMYT
D. IRRI

✅ Answer: B

28. Sorghum hybrids are preferred because of:
A. Lower cost
B. Higher protein
C. Higher yield
D. Early maturity only

✅ Answer: C

29. Sorghum seed depth should be:
A. 1–2 cm
B. 3–5 cm
C. 7–10 cm
D. >10 cm

✅ Answer: B

30. Thinning in sorghum is done at:
A. 5 DAS
B. 10 DAS
C. 15–20 DAS
D. 40 DAS

✅ Answer: C

D. Nutrient, Water, Weed & Yield (MCQs 31–50)

31. Recommended N:P:K dose for sorghum is:
A. 40:20:20
B. 60:30:30
C. 80:40:40
D. 120:60:60

✅ Answer: C

32. Nitrogen should be applied in:
A. Single dose
B. Two splits
C. Three splits
D. Foliar only

✅ Answer: B

33. Critical stage for irrigation in sorghum is:
A. Germination
B. Tillering
C. Flowering
D. Dough stage

✅ Answer: C

34. Sorghum is most sensitive to moisture stress during:
A. Vegetative stage
B. Flowering stage
C. Maturity stage
D. Seedling stage

✅ Answer: B

35. Common weed in sorghum field:
A. Cyperus rotundus
B. Parthenium
C. Chenopodium
D. All of the above

✅ Answer: D

36. Recommended herbicide for sorghum:
A. Atrazine
B. Butachlor
C. Pendimethalin
D. 2,4-D

✅ Answer: C

37. Most common pest of sorghum:
A. Stem borer
B. Shoot fly
C. Aphid
D. Armyworm

✅ Answer: B

38. Most common disease of sorghum:
A. Rust
B. Smut
C. Downy mildew
D. Blast

✅ Answer: B

39. Harvesting stage of sorghum is:
A. Milk stage
B. Dough stage
C. Physiological maturity
D. Full green stage

✅ Answer: C

40. Sorghum yield is measured in:
A. Fresh biomass
B. Grain + stover
C. Grain only
D. Straw only

✅ Answer: B

41. Average grain yield of sorghum is:
A. 5–8 q/ha
B. 10–15 q/ha
C. 25–30 q/ha
D. >50 q/ha

✅ Answer: C

42. Sorghum stover is mainly used for:
A. Fuel
B. Compost
C. Fodder
D. Mulching

✅ Answer: C

43. Lodging in sorghum is caused by:
A. Excess nitrogen
B. Drought
C. Low fertility
D. Shallow sowing

✅ Answer: A

44. Harvest index of sorghum is about:
A. 0.2
B. 0.3
C. 0.4
D. 0.6

✅ Answer: B

45. Sorghum ratooning is:
A. Common practice
B. Not practiced
C. Practiced for fodder
D. Practiced for grain only

✅ Answer: C

46. Sorghum straw contains:
A. High fat
B. High silica
C. Cyanogenic glucosides
D. Alkaloids

✅ Answer: C

47. HCN toxicity in sorghum is common in:
A. Mature crop
B. Young crop
C. Harvested grain
D. Straw

✅ Answer: B

48. Best stage for fodder sorghum harvesting:
A. Boot stage
B. Milk stage
C. Dough stage
D. Maturity

✅ Answer: A

49. Sorghum fits best in crop rotation with:
A. Rice
B. Pulses
C. Cotton
D. Sugarcane

✅ Answer: B

50. Sorghum is important for:
A. Food security
B. Fodder security
C. Climate resilience
D. All of the above

✅ Answer: D


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