Improvement in Food Resources Part 2: MCQs (Q26–Q50)

🌾 Improvement in Food Resources – Class 9 Science MCQs

Section 2: Irrigation, Cropping Patterns & Crop Protection (Q26–Q50)

Q26. The supply of water to crops at regular intervals is called:

A. Harvesting
B. Irrigation
C. Weeding
D. Sowing

✅ Correct Answer: B. Irrigation

Explanation:

Irrigation ensures adequate water supply for plant growth.

Q27. Which of the following is a traditional method of irrigation?

A. Drip irrigation
B. Sprinkler system
C. Chain pump
D. Tube well

✅ Correct Answer: C. Chain pump

Explanation:

Traditional methods include chain pump, moat, rahat, dhekli.

Q28. Which method of irrigation saves the most water?

A. Drip irrigation
B. Flood irrigation
C. Sprinkler irrigation
D. Canal irrigation

✅ Correct Answer: A. Drip irrigation

Q29. Which irrigation method is suitable for sandy soil?

A. Drip irrigation
B. Sprinkler irrigation
C. Flood irrigation
D. Canal irrigation

✅ Correct Answer: B. Sprinkler irrigation

Q30. Which cropping pattern involves growing two crops simultaneously in the same field?

A. Crop rotation
B. Mixed cropping
C. Intercropping
D. Monocropping

✅ Correct Answer: B. Mixed cropping

Q31. The main advantage of mixed cropping is:

A. Decreases yield
B. Reduces risk of crop failure
C. Increases fertilizer use
D. Reduces soil fertility

✅ Correct Answer: B. Reduces risk of crop failure

Q32. Intercropping means:

A. Growing crops one after another
B. Growing two crops in alternate rows
C. Growing single crop repeatedly
D. Growing crops without irrigation

✅ Correct Answer: B. Growing two crops in alternate rows

Q33. The main advantage of intercropping is:

A. Monoculture
B. Better nutrient utilization and reduced pest spread
C. Increased fertilizer use
D. None

✅ Correct Answer: B. Better nutrient utilization and reduced pest spread

Q34. Crop rotation helps in:

A. Soil erosion
B. Increasing pest attack
C. Maintaining soil fertility
D. Reducing irrigation

✅ Correct Answer: C. Maintaining soil fertility

Q35. Growing legumes in crop rotation enriches soil with:

A. Oxygen
B. Nitrogen
C. Phosphorus
D. Potassium

✅ Correct Answer: B. Nitrogen

Q36. Which of these is NOT a cropping pattern?

A. Mixed cropping
B. Intercropping
C. Crop rotation
D. Harvesting

✅ Correct Answer: D. Harvesting

Q37. Which of the following is NOT a weed control method?

A. Tilling
B. Manual removal
C. Herbicides
D. Harvesting

✅ Correct Answer: D. Harvesting

Q38. Chemicals used to kill weeds are called:

A. Insecticides
B. Fungicides
C. Herbicides
D. Rodenticides

✅ Correct Answer: C. Herbicides

Q39. Example of herbicide is:

A. DDT
B. 2,4-D
C. BHC
D. Malathion

✅ Correct Answer: B. 2,4-D

Q40. Chemicals used to kill insects are called:

A. Fungicides
B. Herbicides
C. Insecticides
D. Rodenticides

✅ Correct Answer: C. Insecticides

Q41. Chemicals used to kill fungi are called:

A. Fungicides
B. Insecticides
C. Herbicides
D. Rodenticides

✅ Correct Answer: A. Fungicides

Q42. Pesticides are:

A. Chemicals used to kill pests
B. Fertilizers
C. Manures
D. Antibiotics

✅ Correct Answer: A. Chemicals used to kill pests

Q43. Excessive use of pesticides causes:

A. Soil and water pollution
B. Kills useful organisms
C. Bioaccumulation in food chain
D. All of these

✅ Correct Answer: D. All of these

Q44. Biological pest control means:

A. Use of pesticides
B. Use of natural predators
C. Use of fertilizers
D. Irrigation

✅ Correct Answer: B. Use of natural predators

Q45. An example of biological control is:

A. Using DDT
B. Using ladybird beetles against aphids
C. Spraying fungicides
D. Using herbicides

✅ Correct Answer: B. Using ladybird beetles against aphids

Q46. Weedicides are usually applied when:

A. Crops are very young
B. Crops are mature
C. Crops are harvested
D. Seeds are stored

✅ Correct Answer: A. Crops are very young

Q47. Excess irrigation may lead to:

A. Salinity of soil
B. Soil erosion
C. Waterlogging
D. All of these

✅ Correct Answer: D. All of these

Q48. The process of supplying nutrients through water to crops is called:

A. Bio-fertilization
B. Fertigation
C. Manuring
D. Irrigation

✅ Correct Answer: B. Fertigation

Q49. Which of these is NOT a harmful effect of chemical pesticides?

A. Bioaccumulation
B. Pollution
C. Killing only harmful pests
D. Resistance in pests

✅ Correct Answer: C. Killing only harmful pests

Q50. The most eco-friendly method of pest control is:

A. Chemical pesticides
B. Biological control
C. Excessive irrigation
D. Use of herbicides

✅ Correct Answer: B. Biological control

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