Principles of Agronomy MCQ Questions with Answers for Agriculture Exams

By Skumar

 

Principles of Agronomy MCQ Questions with Answers for Agriculture Exams


Principles of Agronomy focus on the scientific methods used to grow crops efficiently while maintaining soil health and sustainability. It includes important practices such as tillage, crop rotation, irrigation, nutrient management, and weed control. Understanding these principles helps farmers and agriculture students improve crop productivity and use natural resources wisely.

These MCQ questions on Principles of Agronomy are useful for students preparing for agriculture competitive exams, ICAR tests, and academic studies.

Also Read : Climatic Requirements for Fruit Cultivation | Temperature, Rainfall & Climate Factors Explained

Q1. Agronomy is primarily concerned with:

A. Plant breeding
B. Crop production and soil management
C. Crop protection
D. Irrigation engineering

✅ Answer: B
Explanation: Agronomy deals with field crop production and soil management for higher yield.

Q2. The word “Agronomy” is derived from:

A. Latin words
B. Greek words Agros and Nomos
C. Sanskrit words
D. Arabic words

✅ Answer: B
Explanation: Agros = field, Nomos = management.

Q3. Father of Agronomy in India is:

A. M.S. Swaminathan
B. Norman Borlaug
C. Jethro Tull
D. R. Reddy

✅ Answer: C
Explanation: Jethro Tull introduced scientific tillage concepts.

Q4. Crop rotation helps in:

A. Increasing pest incidence
B. Depletion of nutrients
C. Maintaining soil fertility
D. Increasing erosion

✅ Answer: C
Explanation: Rotation balances nutrient use and breaks pest cycles.

Q5. Monocropping means:

A. Growing two crops together
B. Growing one crop year after year on same land
C. Seasonal cropping
D. Mixed farming

✅ Answer: B
Explanation: Same crop repeatedly → nutrient depletion.

Q6. Mixed cropping is:

A. Crops grown in rows
B. Two or more crops grown without definite row arrangement
C. Sequential cropping
D. Relay cropping

✅ Answer: B
Explanation: No specific row pattern; risk-reducing system.

Q7. Intercropping differs from mixed cropping because:

A. No competition
B. Crops grown in rows
C. Only one crop grown
D. Requires more water

✅ Answer: B
Explanation: Intercropping has definite row arrangement.

Q8. Cropping intensity is expressed in:

A. Percentage
B. Ratio
C. Area
D. Time

✅ Answer: A
Explanation: (Gross cropped area / Net sown area) × 100.

Q9. Multiple cropping refers to:

A. One crop per year
B. Growing more than one crop on same land in a year
C. Mixed cropping
D. Intercropping only

✅ Answer: B
Explanation: Sequential or overlapping crops in one year.

Q10. Sole cropping means:

A. Crop mixture
B. One crop grown alone
C. Intercropping
D. Relay cropping

✅ Answer: B

Q11. Tillage refers to:

A. Harvesting operation
B. Soil manipulation for crop growth
C. Fertilizer application
D. Weed control only

✅ Answer: B

Q12. Primary tillage is done to:

A. Pulverize soil
B. Turn soil deeply
C. Remove weeds only
D. Level field

✅ Answer: B
Explanation: Deep ploughing loosens soil.

Q13. Secondary tillage aims at:

A. Soil inversion
B. Seedbed preparation
C. Harvesting
D. Irrigation

✅ Answer: B

Q14. Zero tillage means:

A. Deep ploughing
B. No soil disturbance
C. Manual weeding
D. Flood irrigation

✅ Answer: B

Q15. Mulching helps in:

A. Increasing evaporation
B. Weed growth
C. Moisture conservation
D. Soil erosion

✅ Answer: C

Q16. Organic mulches include:

A. Plastic sheet
B. Straw
C. Polythene
D. Aluminum foil

✅ Answer: B

Q17. Crop density refers to:

A. Number of plants per unit area
B. Yield
C. Height of crop
D. Leaf area

✅ Answer: A

Q18. Optimum plant population ensures:

A. Lodging
B. Maximum yield
C. Pest attack
D. Nutrient loss

✅ Answer: B

Q19. Seed rate depends on:

A. Seed size only
B. Germination percentage
C. Crop duration
D. Market price

✅ Answer: B

Q20. Broadcasting method of sowing results in:

A. Uniform spacing
B. Poor plant population
C. Uneven distribution
D. Line sowing

✅ Answer: C

Q21. Line sowing helps in:

A. Weed management
B. Poor aeration
C. Lodging
D. Disease spread

✅ Answer: A

Q22. Thinning operation is done to:

A. Remove weak seedlings
B. Increase plant population
C. Weed control
D. Irrigation

✅ Answer: A

Q23. Gap filling is done to:

A. Remove extra plants
B. Maintain uniform plant stand
C. Harvest crop
D. Control pests

✅ Answer: B

Q24. Weeds compete with crops for:

A. Light
B. Nutrients
C. Water
D. All of the above

✅ Answer: D

Q25. Critical period of weed competition means:

A. Weeds harmful throughout crop life
B. Period when weeds cause maximum yield loss
C. Weed free period
D. Harvest stage

✅ Answer: B

Q26. Cultural weed control includes:

A. Herbicides
B. Crop rotation
C. Hand weeding
D. Mechanical hoeing

✅ Answer: B

Q27. Mechanical weed control includes:

A. Mulching
B. Hoeing
C. Crop rotation
D. Herbicide spray

✅ Answer: B

Q28. Harvest index is ratio of:

A. Grain yield / Biological yield
B. Straw yield / Grain yield
C. Economic yield / Area
D. Biomass / Time

✅ Answer: A

Q29. Lodging is common in:

A. Short crops
B. Tall cereal crops
C. Pulses
D. Oilseeds

✅ Answer: B

Q30. Crop yield is affected by:

A. Climate
B. Soil
C. Management practices
D. All of the above

✅ Answer: D

Q31. Economic yield refers to:

A. Total biomass
B. Marketable part of crop
C. Straw yield
D. Root yield

✅ Answer: B

Q32. Biological yield includes:

A. Grain only
B. Straw only
C. Grain + straw
D. Root only

✅ Answer: C

Q33. Rainfed agriculture depends on:

A. Canal irrigation
B. Groundwater
C. Rainfall
D. Drip irrigation

✅ Answer: C

Q34. Dry farming is practiced in areas with rainfall:

A. >1000 mm
B. 750–1000 mm
C. <750 mm
D. >1500 mm

✅ Answer: C

Q35. Crops grown in dry farming areas are:

A. Rice
B. Sugarcane
C. Sorghum
D. Banana

✅ Answer: C

Q36. Relay cropping is:

A. Simultaneous sowing
B. Sowing next crop before harvesting previous
C. Mixed cropping
D. Crop rotation

✅ Answer: B

Q37. Crop rotation improves:

A. Soil fertility
B. Pest control
C. Yield stability
D. All of the above

✅ Answer: D

Q38. Fallowing helps in:

A. Soil erosion
B. Moisture conservation
C. Weed growth
D. Nutrient loss

✅ Answer: B

Q39. Green manuring improves:

A. Soil organic matter
B. Soil structure
C. Nitrogen content
D. All of the above

✅ Answer: D

Q40. Most commonly used green manure crop:

A. Wheat
B. Sunhemp
C. Rice
D. Mustard

✅ Answer: B

Q41. Plant growth is influenced by:

A. Light
B. Temperature
C. Water
D. All

✅ Answer: D

Q42. Photoperiodism is response to:

A. Temperature
B. Light duration
C. Water
D. Nutrients

✅ Answer: B

Q43. Long day plants require:

A. Short nights
B. Long nights
C. Continuous darkness
D. Shade

✅ Answer: A

Q44. Short day plants require:

A. Long nights
B. Short nights
C. High temperature
D. Low light

✅ Answer: A

Q45. Vernalization refers to:

A. Cold treatment for flowering
B. Heat treatment
C. Seed soaking
D. Weed control

✅ Answer: A

Q46. Agronomic practices aim to:

A. Increase yield
B. Reduce cost
C. Improve quality
D. All

✅ Answer: D

Q47. Soil moisture is conserved by:

A. Mulching
B. Tillage
C. Irrigation
D. Drainage

✅ Answer: A

Q48. Transplanting is common in:

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

✅ Answer: B

Q49. Nursery raising is done to:

A. Save seeds
B. Ensure uniform seedlings
C. Increase weeds
D. Reduce yield

✅ Answer: B

Q50. Main objective of agronomy is:

A. Soil classification
B. Maximum economic yield
C. Pest control
D. Irrigation design

✅ Answer: B

Conclusion

The Principles of Agronomy form the foundation of all crop production subjects. These 50 MCQs are strictly aligned with ICAR-recommended textbooks and designed for concept clarity + exam orientation. Also Read : Global agriculture knowledge and farming practices are available at the Food and Agriculture Organization



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