1. What are organic fertilizers mainly derived from?
A) Synthetic chemicals
B) Natural plant and animal materials
C) Minerals
D) Petroleum products
Answer: B
2. Compost is produced by the process of:
A) Fermentation
B) Decomposition
C) Photosynthesis
D) Distillation
Answer: B
3. Which organism plays the major role in compost formation?
A) Insects
B) Microorganisms
C) Birds
D) Fish
Answer: B
4. Compost improves:
A) Soil structure
B) Soil fertility
C) Water holding capacity
D) All of these
Answer: D
5. Organic fertilizers release nutrients:
A) Rapidly
B) Slowly
C) Instantly
D) Not at all
Answer: B
6. Which of the following is an example of organic fertilizer?
A) Urea
B) DAP
C) Farmyard manure
D) Ammonium nitrate
Answer: C
7. The ideal C:N ratio for composting is around:
A) 5:1
B) 10:1
C) 30:1
D) 100:1
Answer: C
8. Composting requires which of the following conditions?
A) Moisture
B) Oxygen
C) Microorganisms
D) All of these
Answer: D
9. Vermicompost is produced with the help of:
A) Bacteria
B) Earthworms
C) Fungi
D) Insects
Answer: B
10. Which earthworm species is commonly used in vermicomposting?
A) Eisenia fetida
B) Lumbricus terrestris
C) Perionyx excavatus
D) Both A and C
Answer: D
11. Compost helps to increase:
A) Soil organic matter
B) Soil erosion
C) Soil salinity
D) Soil pollution
Answer: A
12. Organic fertilizers are considered:
A) Eco-friendly
B) Harmful
C) Toxic
D) Polluting
Answer: A
13. Which waste can be used for composting?
A) Vegetable waste
B) Animal manure
C) Crop residues
D) All of these
Answer: D
14. Composting is an example of:
A) Chemical process
B) Biological process
C) Physical process
D) Mechanical process
Answer: B
15. The dark, crumbly product obtained from composting is called:
A) Humus
B) Ash
C) Clay
D) Sand
Answer: A
16. Compost reduces the need for:
A) Irrigation
B) Chemical fertilizers
C) Seeds
D) Machinery
Answer: B
17. Organic fertilizers mainly improve:
A) Soil health
B) Soil toxicity
C) Soil hardness
D) Soil dryness
Answer: A
18. Which material should NOT be added to compost?
A) Plastic
B) Leaves
C) Food waste
D) Grass clippings
Answer: A
19. Green compost materials are rich in:
A) Nitrogen
B) Phosphorus
C) Potassium
D) Calcium
Answer: A
20. Brown compost materials are rich in:
A) Nitrogen
B) Carbon
C) Iron
D) Magnesium
Answer: B
21. Farmyard manure (FYM) is composed of:
A) Animal dung
B) Urine
C) Bedding material
D) All of these
Answer: D
22. Composting temperature usually ranges between:
A) 10–20°C
B) 40–60°C
C) 80–100°C
D) 0–5°C
Answer: B
23. Turning the compost pile helps to:
A) Increase aeration
B) Reduce oxygen
C) Stop decomposition
D) Kill microbes
Answer: A
24. Composting helps in waste:
A) Recycling
B) Disposal
C) Management
D) All of these
Answer: D
25. Vermicompost is rich in:
A) Nutrients
B) Microorganisms
C) Growth hormones
D) All of these
Answer: D
26. Organic fertilizers improve soil:
A) Texture
B) Structure
C) Fertility
D) All of these
Answer: D
27. Composting reduces:
A) Landfill waste
B) Soil fertility
C) Crop yield
D) Soil moisture
Answer: A
28. Which gas is released during composting?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer: B
29. Compost should smell like:
A) Rotten eggs
B) Fresh soil
C) Garbage
D) Chemicals
Answer: B
30. Compost maturity is indicated by:
A) Dark color
B) Earthy smell
C) Crumbly texture
D) All of these
Answer: D
31. Green manure crops include:
A) Sunhemp
B) Dhaincha
C) Cowpea
D) All of these
Answer: D
32. Organic fertilizers help increase:
A) Soil microbes
B) Soil pollution
C) Soil acidity
D) Soil salinity
Answer: A
33. Composting time usually ranges from:
A) 1–2 days
B) 2–3 months
C) 1 year
D) 2 years
Answer: B
34. Organic fertilizers supply nutrients like:
A) Nitrogen
B) Phosphorus
C) Potassium
D) All of these
Answer: D
35. One disadvantage of organic fertilizers is:
A) Slow nutrient release
B) Soil pollution
C) Toxicity
D) Soil erosion
Answer: A
36. Vermicompost improves:
A) Seed germination
B) Plant growth
C) Soil fertility
D) All of these
Answer: D
37. Compost is mainly used in:
A) Organic farming
B) Sustainable agriculture
C) Gardening
D) All of these
Answer: D
38. Composting requires proper:
A) Moisture
B) Aeration
C) Temperature
D) All of these
Answer: D
39. Which of the following is NOT an organic fertilizer?
A) Compost
B) Vermicompost
C) Urea
D) Green manure
Answer: C
40. Compost helps in reducing:
A) Soil erosion
B) Soil fertility
C) Soil microbes
D) Soil nutrients
Answer: A
41. Organic fertilizers are safer for:
A) Soil
B) Environment
C) Humans
D) All of these
Answer: D
42. Composting converts waste into:
A) Pollution
B) Useful fertilizer
C) Gas
D) Chemicals
Answer: B
43. Compost is mainly applied to:
A) Leaves
B) Soil
C) Roots
D) Flowers
Answer: B
44. Which of the following improves soil biodiversity?
A) Compost
B) Pesticides
C) Herbicides
D) Chemicals
Answer: A
45. Organic fertilizers help in sustainable:
A) Industry
B) Agriculture
C) Mining
D) Transport
Answer: B
46. Earthworms in composting help to:
A) Decompose organic matter
B) Destroy soil
C) Reduce fertility
D) Stop plant growth
Answer: A
47. Compost can be made at:
A) Farms
B) Homes
C) Gardens
D) All of these
Answer: D
48. Compost improves soil:
A) Aeration
B) Drainage
C) Water holding capacity
D) All of these
Answer: D
49. Organic fertilizers help reduce:
A) Chemical fertilizer use
B) Soil fertility
C) Crop production
D) Plant growth
Answer: A
50. Composting is an important practice in:
A) Organic farming
B) Sustainable agriculture
C) Waste management
D) All of these
Answer: D
