🌾 Improvement in Food Resources – Class 9 Science MCQs

Section 1: Crop Production & Management, Manure & Fertilizers (Q1–Q25)

Q1. The practice of growing crops on a large scale for food is called:

A. Agriculture
B. Horticulture
C. Apiculture
D. Sericulture

✅ Correct Answer: A. Agriculture

Explanation:

• A. Agriculture = crop + livestock production.
• B. Horticulture = fruits/vegetables.
• C. Apiculture = bee-keeping.
• D. Sericulture = silk production.

Q2. Which is NOT a factor affecting crop yield?

A. Climate
B. Soil fertility
C. Vaccination
D. Irrigation

✅ Correct Answer: C. Vaccination

Q3. The two major crop seasons in India are:

A. Rabi and Kharif
B. Summer and Winter
C. Monsoon and Dry
D. Rice and Wheat

✅ Correct Answer: A. Rabi and Kharif

Q4. Which is a Rabi crop?

A. Rice
B. Wheat
C. Maize
D. Cotton

✅ Correct Answer: B. Wheat

Explanation:

• Rabi crops → winter (wheat, gram, mustard).
• Kharif crops → monsoon (rice, maize, cotton).

Q5. Which is a Kharif crop?

A. Wheat
B. Barley
C. Rice
D. Gram

✅ Correct Answer: C. Rice

Q6. The process of loosening and turning the soil is called:

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

✅ Correct Answer: C. Ploughing

Q7. Which is NOT an advantage of ploughing?

A. Aerates soil
B. Helps roots penetrate
C. Adds nitrogen to soil directly
D. Improves soil fertility

✅ Correct Answer: C. Adds nitrogen to soil directly

Q8. The first step in crop production is:

A. Irrigation
B. Sowing
C. Preparation of soil
D. Harvesting

✅ Correct Answer: C. Preparation of soil

Q9. Good quality seeds are obtained by:

A. Irrigation
B. Hybridisation
C. Fertilizers
D. Manures

✅ Correct Answer: B. Hybridisation

Q10. Organic substance added to soil to increase fertility is called:

A. Fertilizer
B. Compost
C. Pesticide
D. Fungicide

✅ Correct Answer: B. Compost

Q11. Which is NOT a type of manure?

A. Compost
B. Green manure
C. Vermicompost
D. Urea

✅ Correct Answer: D. Urea

Explanation:

• Urea is a chemical fertilizer.

Q12. Fertilizers are:

A. Natural substances
B. Organic manures
C. Inorganic chemicals supplying nutrients
D. Water-based only

✅ Correct Answer: C. Inorganic chemicals supplying nutrients

Q13. Which of the following is an advantage of manure over fertilizers?

A. Increases soil fertility in long run
B. Instant supply of nutrients
C. More expensive
D. Pollutes soil

✅ Correct Answer: A. Increases soil fertility in long run

Q14. Which is a nitrogenous fertilizer?

A. Urea
B. Superphosphate
C. Potash
D. Gypsum

✅ Correct Answer: A. Urea

Q15. Which is a phosphatic fertilizer?

A. Urea
B. Ammonium sulphate
C. Superphosphate of lime
D. Potash

✅ Correct Answer: C. Superphosphate of lime

Q16. Which is a potassic fertilizer?

A. Urea
B. Potassium chloride
C. Superphosphate
D. Nitrate

✅ Correct Answer: B. Potassium chloride

Q17. Excessive use of fertilizers leads to:

A. Soil fertility improvement
B. Soil pollution & water pollution
C. Prevention of erosion
D. None

✅ Correct Answer: B. Soil pollution & water pollution

Q18. Leguminous plants increase soil fertility by fixing:

A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Phosphorus

✅ Correct Answer: C. Nitrogen

Q19. The micro-organisms present in root nodules of legumes are:

A. Rhizobium
B. Lactobacillus
C. Penicillium
D. Virus

✅ Correct Answer: A. Rhizobium

Q20. Green manure is obtained from:

A. Animal dung
B. Decomposed plant matter grown and ploughed into soil
C. Industrial waste
D. Vermicompost

✅ Correct Answer: B. Decomposed plant matter grown and ploughed into soil

Q21. Which crop is grown in standing water?

A. Wheat
B. Rice
C. Cotton
D. Barley

✅ Correct Answer: B. Rice

Q22. Crop rotation helps in:

A. Increasing pest attack
B. Increasing soil fertility
C. Increasing erosion
D. Wasting nutrients

✅ Correct Answer: B. Increasing soil fertility

Q23. Organic manure improves soil by:

A. Adding humus
B. Increasing water retention
C. Adding nutrients slowly
D. All of these

✅ Correct Answer: D. All of these

Q24. Fertilizers are better than manure because:

A. Instant nutrient supply
B. Cheaper always
C. Improve soil texture
D. Add humus

✅ Correct Answer: A. Instant nutrient supply

Q25. Which one is an example of biofertilizer?

A. Blue-green algae
B. Urea
C. Superphosphate
D. Potash

✅ Correct Answer: A. Blue-green algae

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