Crop Production (Kharif & Rabi) – MCQ Series 18
Crop Production (Kharif & Rabi) – MCQ Series 18
Sugarcane
Sugarcane is a major Kharif and Rabi crop cultivated in India for sugar, jaggery, and bioenergy, and is one of the most important cash crops.
PART A: BOTANY & GENERAL FACTS
1. Sugarcane belongs to which family?
A. Poaceae
B. Fabaceae
C. Malvaceae
D. Asteraceae
✅ Answer: A. Poaceae
📝 Explanation: Sugarcane (Saccharum officinarum L.) is a tall perennial grass belonging to the Poaceae family.
2. Botanical name of sugarcane is:
A. Saccharum officinarum
B. Saccharum spontaneum
C. Saccharum barberi
D. Saccharum sinense
✅ Answer: A. Saccharum officinarum
📝 Explanation: The cultivated sugarcane is Saccharum officinarum L., though other species like S. spontaneum and S. barberi are also used in breeding.
3. Sugarcane is grown for:
A. Food
B. Fibre
C. Sugar
D. Oil
✅ Answer: C. Sugar
📝 Explanation: Sugarcane is primarily cultivated for sugar extraction, and by-products include jaggery, ethanol, and bagasse.
4. Sugarcane is a:
A. Annual crop
B. Perennial crop
C. Biennial crop
D. Short-duration crop
✅ Answer: B. Perennial crop
📝 Explanation: Sugarcane is grown as a perennial grass, usually harvested after 12–18 months depending on variety and region.
5. Sugarcane is propagated by:
A. Seeds
B. Setts (stem cuttings)
C. Bulbs
D. Rhizomes
✅ Answer: B. Setts (stem cuttings)
📝 Explanation: Sugarcane is vegetatively propagated using stem cuttings called setts with 2–3 buds.
6. Ideal soil for sugarcane:
A. Sandy soil
B. Loamy soil with good drainage
C. Saline-alkaline soil
D. Rocky soil
✅ Answer: B. Loamy soil with good drainage
📝 Explanation: Sugarcane requires fertile, well-drained soils rich in organic matter.
7. Sugarcane is sensitive to:
A. Waterlogging
B. Frost
C. Shade
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Waterlogging, frost, and shade can reduce growth, yield, and sugar content.
8. Soil pH suitable for sugarcane:
A. 4.5–5.5
B. 5.5–8.0
C. 7.5–9.0
D. Above 9.0
✅ Answer: B. 5.5–8.0
📝 Explanation: Neutral to slightly alkaline soils favor cane growth.
9. Recommended spacing for sugarcane (Kharif crop):
A. 60 × 45 cm
B. 75 × 45 cm
C. 90 × 45 cm
D. 120 × 60 cm
✅ Answer: B. 75 × 45 cm
📝 Explanation: Spacing ensures proper tillering, aeration, and sunlight interception.
10. Seed rate for sugarcane:
A. 500–700 kg/ha (setts)
B. 100–200 kg/ha
C. 800–1000 kg/ha
D. 50–75 kg/ha
✅ Answer: A. 500–700 kg/ha (setts)
📝 Explanation: Depending on variety, 500–700 kg/ha of setts with 2–3 buds each are sown.
11. Sugarcane requires which type of climate?
A. Arid, hot climate
B. Tropical/subtropical warm climate
C. Cold temperate climate
D. Mediterranean climate
✅ Answer: B. Tropical/subtropical warm climate
📝 Explanation: Sugarcane thrives in high temperature, sunlight, and adequate rainfall/irrigation.
12. Optimum temperature for sugarcane growth:
A. 15–20°C
B. 25–35°C
C. 35–40°C
D. Below 10°C
✅ Answer: B. 25–35°C
📝 Explanation: Temperatures above 35°C may cause stress, and below 20°C slows growth.
13. Sugarcane requires water approximately:
A. 500–600 mm
B. 1000–1500 mm
C. 2000–2500 mm
D. 3000–3500 mm
✅ Answer: B. 1000–1500 mm
📝 Explanation: Water is required throughout crop period, especially during tillering and elongation stages.
14. Critical stage of irrigation in sugarcane:
A. Germination
B. Tillering and grand growth
C. Maturity
D. All stages
✅ Answer: B. Tillering and grand growth
📝 Explanation: Adequate water during vegetative growth and elongation ensures better cane and sugar yield.
15. Sugarcane is sensitive to which nutrient deficiency first?
A. Nitrogen
B. Phosphorus
C. Potassium
D. Calcium
✅ Answer: A. Nitrogen
📝 Explanation: Nitrogen is crucial for vegetative growth and tillering; deficiency causes stunted growth and yellowing.
🌱 PART B: AGRONOMY & NUTRITION – 15 MCQs
16. Sugarcane crop duration (Kharif variety):
A. 8–10 months
B. 10–12 months
C. 12–18 months
D. 18–24 months
✅ Answer: C. 12–18 months
📝 Explanation: Crop duration varies by region, variety, and planting time.
17. Recommended NPK dose for sugarcane (general):
A. 120:60:60 kg/ha
B. 150:60:60 kg/ha
C. 200:60:60 kg/ha
D. 100:50:50 kg/ha
✅ Answer: B. 150:60:60 kg/ha
📝 Explanation: Fertilization ensures high cane yield; split doses are applied.
18. Sugarcane requires which type of propagation material?
A. Seedlings
B. Stem setts
C. Root cuttings
D. Bulbs
✅ Answer: B. Stem setts
📝 Explanation: Stem setts with 2–3 buds are planted in furrows for propagation.
19. Planting method for sugarcane:
A. Broadcasting
B. Ridge and furrow / trench method
C. Flat sowing
D. Raised beds
✅ Answer: B. Ridge and furrow / trench method
📝 Explanation: Furrows protect setts from moisture loss and facilitate irrigation.
20. Sugarcane is harvested when sucrose content reaches:
A. 8–10%
B. 12–14%
C. 16–18%
D. 20–22%
✅ Answer: C. 16–18%
📝 Explanation: Harvesting at peak sucrose ensures maximum sugar recovery.
21. Intercultural operation in sugarcane includes:
A. Weeding
B. Earthing up / hilling
C. Irrigation
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Proper intercultural operations improve growth and yield.
22. Sugarcane ratooning is:
A. Growing sugarcane from seeds
B. Harvesting sugarcane once
C. Regrowth from stubble after harvest
D. A type of irrigation
✅ Answer: C. Regrowth from stubble after harvest
📝 Explanation: Ratoon crop is economical, giving 2–3 additional crops from the same field.
23. Major weed in sugarcane:
A. Parthenium
B. Cynodon dactylon (Bermuda grass)
C. Phalaris minor
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Effective weed management is necessary during early growth.
24. Common sugarcane pest:
A. Shoot borer (Chilo infuscatellus)
B. Termites
C. Root grubs
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Integrated pest management is essential to reduce losses.
25. Major sugarcane disease:
A. Red rot
B. Wilt
C. Smut
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Red rot is most destructive; smut and wilt also affect yield.
26. Sugarcane ratoon crops require:
A. Same NPK dose as plant crop
B. Lower NPK dose than plant crop
C. Higher NPK dose
D. No fertilizer
✅ Answer: B. Lower NPK dose than plant crop
📝 Explanation: Nutrient requirement decreases in ratoon crop.
27. Water requirement for sugarcane is highest during:
A. Germination
B. Tillering
C. Grand growth / elongation
D. Maturity
✅ Answer: C. Grand growth / elongation
📝 Explanation: High water demand during vegetative elongation stage.
28. Sugarcane ratoon gives how many harvests on average?
A. 1–2
B. 2–3
C. 3–4
D. 4–5
✅ Answer: B. 2–3
📝 Explanation: Proper management allows 2–3 ratoon crops.
29. Sugarcane is sensitive to which micronutrient deficiency?
A. Iron (Fe)
B. Zinc (Zn)
C. Boron (B)
D. Copper (Cu)
✅ Answer: C. Boron (B)
📝 Explanation: Boron deficiency causes white tip, reduced sugar content, and poor flowering.
30. Bagasse is:
A. Sugarcane juice
B. Residual fibre after juice extraction
C. Cane leaf
D. Cane tops
✅ Answer: B. Residual fibre after juice extraction
📝 Explanation: Bagasse is used as fuel, paper pulp, and bioenergy.
31. Major sugarcane-growing states in India:
A. Uttar Pradesh, Maharashtra, Karnataka
B. Punjab, Haryana
C. Rajasthan, Gujarat
D. Tamil Nadu, Kerala
✅ Answer: A. Uttar Pradesh, Maharashtra, Karnataka
📝 Explanation: These states contribute the highest cane production.
32. Seed sett treatment includes:
A. Fungicide treatment
B. Insecticide treatment
C. Both A & B
D. No treatment
✅ Answer: C. Both A & B
📝 Explanation: Protects setts from pests and diseases during planting.
33. Sugarcane ratoon cropping reduces:
A. Labour cost
B. Fertilizer requirement
C. Seed material cost
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Ratoon cropping is economical and reduces input cost.
34. Sugarcane juice extraction requires:
A. Mechanical crushing
B. Hydraulic pressing
C. Both
D. Fermentation
✅ Answer: C. Both
📝 Explanation: Juice is extracted for sugar, jaggery, and ethanol production.
35. Ripening of sugarcane is accelerated by:
A. Ethylene
B. Growth regulators like Ethephon
C. Nitrogen fertilizer
D. Water stress
✅ Answer: B. Growth regulators like Ethephon
📝 Explanation: Ethephon promotes sucrose accumulation and uniform maturity.
36. Sugarcane requires sunlight for:
A. Photosynthesis
B. Tillering
C. Sucrose accumulation
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Full sunlight is crucial for vegetative growth and sugar content.
37. Sugarcane ratoon yield is usually:
A. 10–15% higher than plant crop
B. 10–15% lower than plant crop
C. Same as plant crop
D. 20–25% higher than plant crop
✅ Answer: B. 10–15% lower than plant crop
📝 Explanation: Nutrient depletion and stubble age reduce yield.
38. Sugarcane ratoon crop is prone to:
A. Pest build-up
B. Soil-borne diseases
C. Reduced vigour
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Proper management is essential for ratoon sustainability.
39. Sucrose content in cane is measured using:
A. Polarimeter
B. Refractometer / Brix meter
C. Hydrometer
D. Spectrophotometer
✅ Answer: B. Refractometer / Brix meter
📝 Explanation: Determines sugar percentage in juice for harvest timing.
40. Top dressing of nitrogen in sugarcane is done at:
A. Planting
B. Tillering stage
C. Grand growth stage
D. Maturity
✅ Answer: B. Tillering stage
📝 Explanation: Ensures vegetative growth and high tiller survival.
41. Red rot of sugarcane is caused by:
A. Colletotrichum falcatum
B. Sporisorium scitamineum
C. Leifsonia xyli
D. Phytophthora spp.
✅ Answer: A. Colletotrichum falcatum
📝 Explanation: Red rot is a major fungal disease reducing cane yield and sugar content.
42. Sugarcane smut is caused by:
A. Colletotrichum falcatum
B. Sporisorium scitamineum
C. Phytophthora
D. Fusarium spp.
✅ Answer: B. Sporisorium scitamineum
📝 Explanation: Characterized by black whip-like structure on cane tops.
43. Sugarcane insect pest causing shoot borer is:
A. Chilo infuscatellus
B. Pyrilla perpusilla
C. Termites
D. Aphids
✅ Answer: A. Chilo infuscatellus
📝 Explanation: Damages shoots, reduces tillers, and affects cane growth.
44. Sugarcane ratoon crop is usually harvested after:
A. 8–10 months
B. 10–12 months
C. 12–14 months
D. 15–18 months
✅ Answer: C. 12–14 months
📝 Explanation: Shorter duration than plant crop but still enough for sugar accumulation.
45. Sugarcane varieties in India are classified as:
A. Co 86032, Co 0238, Co 1148
B. Early, mid, and late duration
C. Both A & B
D. Only early varieties
✅ Answer: C. Both A & B
📝 Explanation: Varieties differ in duration, yield, and disease resistance.
46. Fertilizer application in ratoon crop is:
A. Same as plant crop
B. 25–30% lower than plant crop
C. 50% higher
D. Not required
✅ Answer: B. 25–30% lower than plant crop
📝 Explanation: Nutrient requirement decreases in ratoon crop.
47. Major ratoon crop problem is:
A. Pest buildup
B. Reduced vigour
C. Soil nutrient depletion
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Integrated management practices are needed.
48. Ripening of sugarcane is delayed by:
A. High nitrogen application
B. Late planting
C. Excess water
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: High nitrogen and excessive water delay sucrose accumulation.
49. Sugarcane tops and leaves are used as:
A. Fodder
B. Mulch
C. Bioenergy
D. All of the above
✅ Answer: D. All of the above
📝 Explanation: Cane tops are valuable for livestock feed and energy production.
50. Average yield of sugarcane in India:
A. 50–60 t/ha
B. 70–80 t/ha
C. 90–100 t/ha
D. 120–130 t/ha
✅ Answer: B. 70–80 t/ha
📝 Explanation: Depends on variety, region, and management practices.
Comments
Post a Comment