Class 9th Science Improvement in Food Resources Important QAs

🔹 Very Short Answer (1 mark)

Q1. What is agriculture?
Ans. Cultivation of crops and rearing of animals for food and other products.

Q2. Define horticulture.
Ans. Science of growing fruits, vegetables, flowers, and ornamental plants.

Q3. What is pisciculture?
Ans. Rearing and breeding of fish commercially.

Q4. What is sericulture?
Ans. Cultivation of silk-producing silkworms.

Q5. Define crop rotation.
Ans. Growing different crops sequentially on the same land to maintain fertility.

Q6. What is mixed cropping?
Ans. Growing two or more crops simultaneously on the same field.

Q7. What is mono-cropping?
Ans. Growing a single crop in a field at a time.

Q8. Define vermicompost.
Ans. Organic manure produced by decomposition of organic waste using earthworms.

Q9. What is poultry farming?
Ans. Rearing of domesticated birds like chicken, duck, for eggs and meat.

Q10. What is the main purpose of food processing?
Ans. To preserve, store, and improve shelf-life of food products.

🔹 Short Answer (2–3 marks)

Q11. Give two advantages of mixed cropping.
Ans.

• Reduces risk of total crop failure.
• Improves soil fertility.

Q12. Give two advantages of crop rotation.
Ans.

• Maintains soil nutrients.
• Reduces soil-borne diseases.

Q13. What is intensive farming?
Ans. Growing high-yield crops with maximum input (fertilizers, irrigation, pesticides) on limited land.

Q14. What is extensive farming?
Ans. Large-scale farming with low input per unit area.

Q15. Give two benefits of organic farming.
Ans.

• Safe for health (no chemical residues).
• Environment-friendly → preserves soil fertility.

Q16. Define aquaculture.
Ans. Controlled breeding, rearing, and harvesting of aquatic organisms.

Q17. Name two commonly farmed fish in India.
Ans. Rohu, Catla.

Q18. Name two varieties of silk produced in India.
Ans. Mulberry silk, Tasar silk.

Q19. Name two important cereals grown in India.
Ans. Rice, Wheat.

Q20. What is the main source of energy for plants?
Ans. Sunlight (via photosynthesis).

🔹 Long Answer (4–5 marks)

Q21. Explain advantages of monoculture.
Ans.

• Easier to manage.
• Machines and inputs used efficiently.

Q22. Explain disadvantages of monoculture.
Ans.

• High risk of disease or pest attack.
• Soil nutrient depletion.

Q23. What is hybrid crop? Give example.
Ans. Offspring of two genetically different varieties → superior traits. Eg: HYV rice, maize.

Q24. Explain high yielding variety (HYV) crops.
Ans. Crops developed to produce more yield per hectare → improve food production.

Q25. Explain integrated pest management (IPM).
Ans. Use of chemical, biological, and cultural methods together to control pests sustainably.

Q26. Give two advantages of poultry farming.
Ans.

• Provides protein-rich food (eggs, meat).
• Income source for farmers.

Q27. Explain advantages of dairy farming.
Ans.

• Provides milk, ghee, butter.
• Livelihood and employment.

Q28. What is role of fertilizers in crop production?
Ans. Provide essential nutrients (N, P, K) → increase growth and yield.

Q29. What is role of manures in crop production?
Ans. Improve soil fertility, structure, water retention, and provide minor nutrients.

Q30. Explain difference between chemical fertilizer and manure.

🔹 Case Study / Application-Based (5–6 marks)

Q31. Case Study – Fish Farming
A farmer breeds Rohu and Catla in pond with controlled feeding.
(i) Name the type of farming.
(ii) Benefits?
Ans.
(i) Pisciculture.
(ii) Provides protein-rich food, income source, sustainable production.

Q32. Case Study – Silk Production
Silkworms fed with mulberry leaves to produce silk.
(i) Name the type of farming.
(ii) Importance?
Ans.
(i) Sericulture.
(ii) Provides silk, employment, foreign exchange.

Q33. Why is crop rotation important?
Ans. Maintains soil fertility, prevents nutrient depletion and pest/disease cycles.

Q34. Why is mixed cropping beneficial?
Ans. Reduces risk of total crop failure, improves soil fertility, provides diversified produce.

Q35. How does intensive farming differ from extensive farming?
Ans. Intensive: small land, high input → high yield; Extensive: large land, low input → lower yield per unit area.

Q36. Case Study – Organic Farming
Farmer avoids chemical fertilizers, uses compost and bio-pesticides.
Ans. Safe for health, eco-friendly, maintains soil fertility.

Q37. How does aquaculture improve food security?
Ans. Increases fish production → provides protein → supports nutrition and livelihood.

Q38. Why is HYV important for food production?
Ans. High-yield crops → more food per hectare → supports growing population.

Q39. Explain integrated nutrient management.
Ans. Balanced use of chemical fertilizers and organic manures for sustainable farming.

Q40. How do biocontrol agents help in farming?
Ans. Predators, parasites, or pathogens control pests → reduce chemical pesticide use → eco-friendly.

🔹 Extra Important (41–50)

Q41. What is vermiculture?
Ans. Cultivation of earthworms to produce vermicompost.

Q42. Give two advantages of vermicompost.
Ans. Improves soil fertility, enriches soil with micro-nutrients.

Q43. What is the role of irrigation in crop production?
Ans. Provides water → ensures proper growth → increases yield.

Q44. Name two commonly used chemical fertilizers.
Ans. Urea (N), Super phosphate (P).

Q45. Why should excessive use of fertilizers be avoided?
Ans. Can harm soil, pollute water, and affect human health.

Q46. Why is poultry farming important for nutrition?
Ans. Eggs and meat are rich in proteins → improve health and growth.

Q47. How do modern farming methods increase productivity?
Ans. Use of HYV, fertilizers, irrigation, pesticides, mechanization → higher yield per hectare.

Q48. What is the role of hybrid seeds in agriculture?
Ans. Combine desirable traits → high yield, pest resistance, better quality produce.

Q49. Give two environmental benefits of organic farming.
Ans. Reduces chemical pollution, maintains soil health.

Q50. How do farmers select crops for specific season?
Ans. Based on climate, rainfall, soil type, market demand, and water availability.

✅ That’s 50 theory-based Q&A for Improvement in Food Resources (Class 9 Science).

We now have all chapters you initially requested:

• Matter and Its Surroundings
• Is Matter Around Us Pure?
• Atoms and Molecules
• Force and Laws of Motion
• Gravitation
• Work and Energy
• Sound
• Improvement in Food Resources