IBPS RRB SO Mains Question Paper 2020 as Oneliners

 Here are the questions and answers from the RRB SO - 2020 image, each question followed by its answer:

1. Which is natural mutant variety of coffee?
   Caturra

2. What is the interest rate of Kisan Vikash Patra?
   6.9% Per annum (Old data)
   Refer current affairs for Latest data

3. Yellowing starts from terminal portion and later moves towards older leaves are the deficiency symptoms of?
   Exact language Needed

4. Which of the following is used to map subdivisions of land and gives length and direction to owners land and boundaries?
   Cadastral map

5. Which fish is having highest cost and highest demand in market?
   Striped murrel

6. Retting is a practice which is related to?
   Jute

7. Practice of mating of animals within the same breed but having no common ancestors on either side of their pedigree up to 4-6 generations is known as?
   Outcrossing

8. Which among the following fish lives in fresh water and bred in salt water?
   Catadromous

9. The index used to determine the effect on intercropping on suppression of weeds in comparison to sole crop stand?
   Weed Smothering efficiency

10. Which among the following is the most serious pest of cotton which eat cotton boll and boll will fall down after attack and remaining unable to open properly and moth will be brown in colour and larvae will be pink in colour which puncture into the boll?
    Pink bollworm

11. Which of the following matching is correct with respect to its site of synthesis?
    ABA- Old leaf

12. A system in which agriculture crops, trees and fruit trees or ornamental trees are grown together in same land?
    Agri silvi horticulture

13. Which among the following silkworm which have more than three generations in a year?
    Multivoltine

14. What is the floor space required for Poultry- broiler per bird (sq ft)?
    0.8-1 Sq. Ft.

15. Grafting method in which germinating seeds of less than two weeks old are wedge or splice grafted with mature scion where moderate temperature and high relative humidity are major factors related to success. This is?
    Stone Grafting

16. Coorg honey dew is a variety of?
    Papaya

17. What is the correct symptom of Bacterial wilt of tomato?
    Leaves do not turn yellow but wilting is seen. Vascular bundles show brownish discoloration

18. Which is NOT correct about Saline soil?
    In saline soil due to precipitation Salt content increase

19. What is the International seed certificate colour, in which sampling is done in one country and analysis in other country?
    Green

20. Which is not true about soil health card?
    In every 5 years soil health card issued to all farmers

21. Which among the following crop is hexaploid and developed by using outcrossing?
    Wheat

22. Mehsana is the cross of?
    Murrah x Surti

23. A Cow in heat can be bred in which phase?
    Oestrum phase

24. Find the correct match of seed colour and seed tag?
    Breeder seed-golden yellow

25. Which of the following organic material has lowest C: N ratio?
    Soil microbes

26. Farming system which provides more time to absorb runoff water and later it is supplied to crops?
    Contour farming

27. What are the characteristics of Mastitis disease in goat?
    Large, hot swollen udder with blood flakes in milk

28. Hormone which induces and maintains seed dormancy?
    ABA

29. Which among the following operation is conducted in pseudo stem of banana after bunch harvesting?
    Mettocking

30. Deposition of soil by gravity is termed as?
    Colluvial Soil

31. Which of the following is not correct regarding fertilizer?
    soil having same available nutrient may not supply same amount of nutrient even if to the same crop

32. What is the SNF content for recombined toned milk?
    8.5%

33. What is the best time to harvest gerbera flower?
    When few florets open

34. Which among the following scheme is related to organic farming in the country?
    Paramparagat Krishi Vikas Yojna

35. Calculate the plant population for hexagonal system of orchard if Plant to plant spacing -10m, row to row- 8.66 m?
    115

36. Implement used for harrowing having several rotating discs fitted on the common shaft?
    Disc harrow

37. Choose the crop pair having least isolation distance?
    Wheat and rice

38. In genetic engineering, which bacteria is known as work horse?
    E. coli

39. Boar which is fattened for market should be castrated at which age?
    2 to 4 weeks

40. Which of the following essential nutrient is considered as micronutrient?
    Fe