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Crop Science MCQs for LEA Preparation (With Answer Key)

Byआदित्य अभिषेक

Hey students, preparing for your upcoming agriculture examinations such as PRC LEA, UPSC, ICAR JRF, etc. but confused about whether your preparation is going well or not? Well, no more! At Agriculture Review, we keep updating new test series based on previous years’ questions of the Examination for Agriculturists.

📘 How to Attempt These LEA Based MCQs

Follow these simple steps to simulate exam conditions, boost accuracy, and learn from mistakes effectively.

  1. Read each question carefully. Look for keywords like “primary,” “most common,” या “best suited.”
  2. Use the elimination method. Cross out obviously wrong options first to narrow choices.
  3. Time management: Aim for 1 minute per question (total 50 minutes). Mark hard questions and return to them later.
  4. Think conceptually. LEA questions often test application — ask yourself why an answer fits.
  5. Keep calculations minimal. Most MCQs are conceptual; when calculations appear, write steps clearly.
  6. After finishing, review answers. Check the answer key only after completing the whole test to assess time and accuracy.
  7. Create a revision list. Note down topics you missed and review them in short, focused sessions.
Quick tips:
  • Answer easy questions first to secure marks quickly.
  • For disease questions, remember causative agents (virus/bacteria/protozoa) and prevention methods (vaccination/biosecurity).
  • Memorize common breeds, top-producing regions, and key lab tests (e.g., CMT for mastitis).

Tip: Repeat the quiz weekly and track progress. Consistent practice beats last-minute cramming.

You can also join our Facebook Broadcast Channel, where we regularly share newly updated questions. All the best for today—I hope you become a registered Agriculturist soon!

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crop-science-mcqs-for-lea-preparation-with-answer-key
Crop Science MCQs

Crop Science MCQs

1. In a rice-based cropping system, which of the following is the primary advantage of relay cropping?

2. In maize production, the recommended planting distance for hybrid varieties under favorable conditions is approximately:

3. Which of the following field crops uses C4 photosynthetic pathway, contributing to its high productivity in tropical climates?

4. The process of removing tassels in maize to facilitate hybrid seed production is known as:

5. In rice cultivation, “puddling” of soil primarily helps in:

6. Which root crop is classified under the family Euphorbiaceae and contains cyanogenic glycosides?

7. In tomato cultivation, which nutrient deficiency is most closely associated with blossom-end rot?

8. Which of the following is the correct chromosome number of cultivated wheat (Triticum aestivum L.)?

9. Which type of dormancy in seeds is primarily caused by hard and impermeable seed coats, as seen in legumes?

10. The most widely used chemical for breaking seed dormancy in lettuce is:

11. Which among the following is the most critical stage of water requirement in rice?

12. The practice of planting two or more crops in a definite row arrangement at the same time is referred to as:

13. In hybrid rice seed production, which of the following is used as a pollen source to fertilize male sterile lines?

14. Which of the following methods is most effective for controlling Striga (witchweed) in sorghum fields?

15. In the context of crop physiology, the compensation point in plants refers to the level of:

16. Which among the following crops is most sensitive to photoperiod and commonly exhibits short-day response?

17. Which of the following crops is commonly propagated using true seed rather than vegetative parts?

18. In sugarcane production, the process of removing the top portion of the cane stalk before harvest is called:

19. Which of the following is NOT a characteristic of an ideal seed variety?

20. Which dormancy-breaking treatment is most suitable for seeds with hard seed coats such as Acacia?

21. In the System of Rice Intensification (SRI), seedlings are transplanted at what approximate age?

22. In groundnut, peg penetration into the soil is essential for pod formation. Pegs originate from which part of the plant?

23. Hybrid vigor (heterosis) in crops is maximized when parents are:

24. Which among the following crops is a cross-pollinated crop mainly pollinated by wind (anemophily)?

25. Which nutrient is considered most critical for early root development in cereal crops?

26. In sweet potato cultivation, which planting material is commonly used for propagation?

27. Which of the following crops is most tolerant to saline soils?

28. In sorghum, the accumulation of cyanogenic glycoside “dhurrin” is most toxic to livestock during:

29. In onion seed production, the recommended isolation distance under open-pollinated conditions is approximately:

30. Which of the following herbicides is classified as a pre-emergence, selective herbicide commonly used in rice?

31. Which of the following is a distinguishing feature of the reproductive stage R3 in soybean?

32. In rice, which nutrient deficiency is typically indicated by bronzing of leaves in younger stages?

33. Which of the following is a characteristic of C4 crop physiology compared to C3 crops?

34. What is the critical moisture content of maize grain for safe long-term storage?

35. In cassava production, cyanogenic glycosides are concentrated most in which plant part?

36. Which physiological disorder in tomato is primarily linked to calcium deficiency?

37. Which of the following is the recommended isolation distance for certified hybrid maize seed production?

38. In sugarcane, ratooning refers to:

39. What is the principal mode of pollination in oil palm (Elaeis guineensis)?

40. In banana, the removal of male flowers after bunch formation is practiced mainly to:

41. The presence of purple leaf margins in maize is a typical symptom of which nutrient deficiency?

42. In the context of rice cultivation, what does “straighthead disorder” primarily result from?

43. Which among the following crops is classified as a “short-day” plant?

44. In sorghum, “midge” damage is most critical during which stage of crop development?

45. Which of the following is the critical stage for irrigation in wheat?

46. In the context of crop physiology, Harvest Index (HI) is expressed as:

47. In chickpea, which of the following constraints is commonly associated with excessive irrigation?

48. In onion production, which photoperiod group is generally suitable for tropical regions like the Philippines?

49. Which of the following post-harvest operations in rice is crucial for reducing fissure formation in grains?

50. In groundnut, “aflatoxin contamination” is mainly associated with infection by:

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