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Soil Science MCQs for Agriculture Competitive Exams

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.

In this test, you have to attempt 50 questions from the Soil Science subject. Attempting all questions is necessary to identify your strengths and weaknesses. After completing the test, you can take a screenshot of your result for future reference and compare it with past performances. To stay updated with regular test series, click on the bell icon at the bottom left corner of the screen.

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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Soil Science MCQs

Soil Science MCQs

1. Which of the following nutrients becomes less available to plants when soil pH exceeds 7.5?

2. A soil sample feels gritty when rubbed between fingers, has poor cohesion, and drains water rapidly. Its texture is most likely classified as:

3. A farmer wants to apply 60 kg of Nitrogen (N) per hectare using Urea (46% N). How many kilograms of Urea should be applied per hectare?

4. Interveinal chlorosis of older leaves is a typical symptom of deficiency in which nutrient?

5. Which of the following practices is most effective in preventing soil erosion in steep upland farms?

6. Which type of erosion is caused by the removal of thin soil layers by wind in dry and arid regions?

7. Which Philippine soil order is characterized by acidic, highly weathered soils with low natural fertility and is commonly found in upland areas?

8. Which soil microorganism is primarily responsible for biological nitrogen fixation in leguminous crops?

9. At a soil pH below 5.5, which of the following micronutrients may reach toxic levels for plants?

10. Which soil structure type promotes the best root penetration and water infiltration in agricultural soils?

11. Which amendment is most commonly used to raise the pH of acidic soils and improve nutrient availability?

12. Which soil texture holds the highest water per unit volume but often causes poor drainage?

13. A field requires 40 kg of Phosphorus (P₂O₅) per hectare. If the fertilizer contains 18% P₂O₅, how many kilograms of fertilizer should be applied per hectare?

14. Stunted growth, purplish discoloration of leaves, and delayed maturity in corn plants are symptoms of:

15. Which of the following is NOT considered an effective soil conservation practice in upland areas?

16. Rill erosion differs from gully erosion in that rill erosion:

17. Which Philippine soil order is known for its volcanic ash origin and high water-holding capacity, making it ideal for crops like rice and vegetables?

18. Azospirillum bacteria enhance crop growth primarily by:

19. At what soil pH range are micronutrients like Iron (Fe), Manganese (Mn), and Zinc (Zn) most available to plants?

20. Which of the following improves soil aggregation and structure most effectively over time?

21. Which of the following is a common consequence of very acidic soils (pH < 5.0) on crop growth?

22. A soil feels smooth, slippery, and ribbons when wet. It is likely dominated by which particle size?

23. A field requires 40 kg of Potassium (K₂O) per hectare. If Muriate of Potash (MOP) contains 60% K₂O, how much fertilizer should be applied per hectare?

24. General chlorosis, stunted growth, and early leaf drop are typical symptoms of:

25. Which practice helps maintain soil fertility and prevent erosion by alternating strips of grass and crops?

26. The construction of small dams or barriers across a waterway to slow water flow and capture sediment is called:

27. Which Philippine soil order is particularly suited for rice production due to its high clay content and water retention capability?

28. Which of the following is NOT a direct benefit of soil microorganisms to crop production?

29. Why is liming often recommended before applying phosphorus fertilizers in acidic soils?

30. Which of the following practices improves soil structure by increasing organic matter content and promoting aggregation?

31. Which of the following is a primary factor that influences soil formation?

32. What is the typical characteristic of sandy soil regarding nutrient retention?

33. The calculation to determine fertilizer application rate generally involves:

34. Interveinal chlorosis in young leaves, especially in new growth, is a typical symptom of:

35. Contour farming helps prevent soil erosion primarily by:

36. Gullies are formed by which type of erosion process?

37. Which soil order in the Philippines is known for its good fertility and moderate drainage, often used for high-value crops?

38. The symbiotic relationship between plant roots and fungi that helps plants absorb phosphorus is called:

39. Which of the following is the most correct description of the role of decomposer microorganisms?

40. Elemental sulfur is commonly used in acidic soils to:

41. The most suitable time to apply organic mulch in crop fields is:

42. Loamy soil is best for crop production because it:

43. The purpose of adding gypsum to soils is primarily to:

44. Which of the following is NOT a role of soil organic matter?

45. Which Philippine soil order is characterized by young soils with weak profile development, often found in floodplains?

46. Nitrogen-fixing bacteria associated with non-leguminous plants are called:

47. Excessive nitrogen application in soils may result in:

48. Mulching in agricultural fields helps to:

49. Soil pH is defined as the:

50. Which of the following is a biological method of soil conservation?

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आदित्य अभिषेक ने एसडीएसयूवी, उत्तराखंड से कृषि में स्नातक की पढ़ाई पूरी की है। वह कृषि और गृह बागवानी पर सीखने और ज्ञान प्रदान करने पर ध्यान केंद्रित करते हैं। उन्होंने कृषि, बागवानी और दुकान की गुणवत्ता वाले उत्पादों और सेवाओं की बेहतर प्रथाओं को सीखने के लिए सभी प्रकृति उत्साही लोगों के लिए एक सामान्य मंच के रूप में एग्रीकल्चर रिव्यू बनाई।

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