Competitive Exams: Agriculture MCQs (Practice-Test 23 of 56)

  1. What is the fraction of soil organic matter which is soluble both in alkali and acid?

    1. Humic acid

    2. Fulvic acid

    3. Hymatomelonic acid

    4. Humin

  2. The black colour of verticals is due to the presence in these soils of

    1. Iron and magnesium

    2. Copper and organic matter

    3. Manganese, titanium and organic matter complex

    4. Organic matter and calcium

  3. The immobility of phosphorus in soils is primarily a result of orthophosphates:

    1. reacting with Ca in acid soils and Fe and Al in neutral and basic soils (b)

    2. Being immobilized in organic matter

    3. reacting with Fe and Al in acid soils and Ca in neutral and basic soils

    4. reacting with K in acid soils and Ca in neutral and basic soils

  4. Match List-with List-and select the correct answer using the code given below the lists:

    List-I (Microbial process) List-II (Micro-ganism)
    1. Nitrification

    2. Denitrification

    3. Symbiotic nitrogen fixation

    4. Non-mbiotic nitrogen fixation

    1. Nitrosomonas

    2. rhizobium

    3. Bacillus

    4. Clostridium

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 4
      • 1
      • 3
      • 2
      • 4
      • 4
      • 2
      • 3
      • 1
      • 4
      • 3
      • 2
      • 1
  5. The biological nitrogen fixation in modulating plants converts the molecular dinitrogen in air into several compounds in which one of the following sequences?

    1. Dinitrogen-ammonia-hydrazine-amino acid-polypeptide protein

    2. Dinitrogen-amino compounds-ammonia hydrazine-amino acid-polypeptide protein

    3. Dinitrogen-hydrazine-nitrite-ammonia amino acid-polypeptide protein

    4. Dinitrogen-hydrazine-ammonia-amino acid-polypeptide-protein

  6. Consider the following statements:

    1. Citrus aurantifolia is propagated from seed, budding on rough root stock and layering.

    2. Citrus aurantifolia flower once a year in Februar March.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  7. The micronutrient which is a constituent of vitamin B12 is:

    1. Copper

    2. Cobalt

    3. Zinc

    4. Boron

  8. Which one of the following nutrients promotes root growth, keeps the soil reaction natural and improves the soil structure?

    1. Sulphur

    2. Potassium

    3. Calcium

    4. Magnesium

  9. Consider the following bacteria:

    1. Azotobacter

    2. Bacillus

    3. Klebsiella

    Which of the above is/ar facultative anaerobic bacteria?

    1. 1 and 2

    2. 2 only

    3. 2 and 3

    4. 1 and 3

  10. Which one of the following is an organic chemical fertilizer?

    1. Calcium ammonium nitrate

    2. Urea

    3. Ammonium phosphate

    4. Muriate of potash

  11. Match List-with List-and select the correct answer using the code given below the lists:

    List-I (Available nutrients) List-II (Extract ants used)
    1. Potassium

    2. Boron

    3. Iron

    4. Molybdenum

    1. Neutral normal ammonium acetate

    2. Conc 0.005 M DTPA pH = 7.3

    3. hot water

    4. Ammonium oxalate pH = 3.3

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 4
      • 4
      • 3
      • 2
      • 1
      • 4
      • 2
      • 3
      • 1
      • 1
      • 3
      • 2
      • 4
  12. Fresh organic residue as addition to a standing crop leads to:

    1. Denitrification loss of soil nitrogen

    2. Volatilization loss of nitrogen

    3. Decomposition of ammonia in soil

    4. Immobilization of available nitrogen in soil

  13. Consider the following statements: Green manuring with dhanich (Sesbania aculata) improves soil fertility by:

    1. Lowering the ph of soil

    2. Atmospheric nitrogen fixation through root nodules

    3. Contributing large quantity of biomass to the soil.

    Which of the statements given above is/are correct?

    1. 1 and 2 only

    2. 2 and 3 only

    3. 3 only

    4. 1, 2 and 3

  14. Match List I with List II and select the answer using the code given below the lists:

    List-I (Theory) List-II (Scientist)
    1. Pressur flow theor of solute translocation

    2. Cytochrome pump theor of salt uptake

    3. Chemeosmotic theor of ATP synthesis

    4. Cohesion tension theor of ascent of sap

    1. Mitchell

    2. Dixon

    3. munch

    4. Lundergarth

    • A
    • B
    • C
    • D
      • 3
      • 1
      • 4
      • 2
      • 3
      • 4
      • 1
      • 2
      • 2
      • 1
      • 4
      • 3
      • 2
      • 4
      • 3
      • 1
  15. Match List-with List-and select the correct answer using the code given below the lists:

    List-I (Plant species) List-II (Chromosome number)
    1. Cajanus cajan

    2. Triticum durum

    3. Triticum aestivum

    4. Zea mays

    1. Chromosome Number 20

    2. Chromosome Number 22

    3. Chromosome Number 28

    4. Chromosome Number 42

    • A
    • B
    • C
    • D
      • 1
      • 4
      • 3
      • 2
      • 2
      • 3
      • 4
      • 1
      • 1
      • 3
      • 4
      • 2
      • 2
      • 4
      • 3
      • 1
  16. High organic matter content in the soil reduces the availability of which one of the following to the plants?

    1. Copper

    2. Iron

    3. Boron

    4. Molybdenum

  17. Which one of the following pair is not correctly matched?

      • Maize
      • Monoecious
      • Papaya
      • Dioecious
      • Rye
      • Self-compatible
      • Pear millet
      • Protandrous
  18. Which of the following mutagens is nonionizing type?

    1. X-ys

    2. Gamma rays

    3. Ultra-olet rays

    4. Beta rays

  19. The factor responsible for cytoplasmic male sterility in plants ar located in the:

    1. rNA

    2. Nuclear DNA

    3. Chloroplast DNA

    4. Mitochondrial DNA

  20. Consider the following statements: Mass selection can be applied for improving

    1. Land races

    2. Hybrids

    3. Old varieties

    4. Bulk derived by crossing two varieties

    Which of the statements given above are correct?

    1. 1 and 2

    2. 1 and 3

    3. 2, 3 and 4

    4. 1, 3 and 4

  21. Match List-with List-and select the correct answer using the code given below the lists:

    List-I (Breeding objective) List-II (Breeding method)
    1. Addition of a single resistant gene into an adapted variety

    2. Combining useful traits of two different varieties together

    3. Creation of new variability

    4. Exploitation of non-ditive genetic variance

    1. Pur line breeding

    2. Heterosis

    3. Back cross

    4. recombinant breeding

    5. Mutation

    • A
    • B
    • C
    • D
      • 4
      • 1
      • 2
      • 5
      • 3
      • 4
      • 2
      • 5
      • 4
      • 1
      • 5
      • 2
      • 3
      • 4
      • 5
      • 2
  22. Which one of the following crops is used in corps rotation for the management of plant parasitic nematodes?

    1. Castor

    2. Wheat

    3. Marigold

    4. Sweet pea

  23. Which one of the following statements is not correct?

    1. In a male sterile plant, the male gametes ar nonfunctional

    2. In a self-compatible plant, the male gametes ar functional but ther are genetic barrier ar fertilization

    3. Self-compatibility can be used for the production of hybrids

    4. Plants showing self-compatibility also show cross incompatibility

  24. Match List-with List-and select the correct answer using the code given below the lists:

    List-I (Category of seed) List-II (Producer)
    1. Breeder

    2. Nucleus

    3. Foundation

    4. Certified

    1. Breeder of the variety

    2. Any other breeder under the supervision of breeder of the variety

    3. Government farm/contract farmers/seed agencies under the supervision of exper from NSC

    4. Progressive farmers

    • A
    • B
    • C
    • D
      • 4
      • 1
      • 3
      • 2
      • 2
      • 3
      • 1
      • 4
      • 2
      • 1
      • 3
      • 4
      • 4
      • 3
      • 1
      • 2
  25. Pusa Bold is a variety of:

    1. Lentil

    2. Mustard

    3. rice

    4. Wheat

  26. Which one of the following breeding methods is most appropriate for the development of disease resistant varies?

    1. Mass selection

    2. Back cross Method

    3. recurrent selection

    4. Bulk method

  27. Which one of the following statements is not correct regarding the pedigree method of breeding?

    1. In the pedigree method, characteristics of all the progenies under evaluation ar accurately recorded

    2. Pedigree method aims at exploiting transgress segregation and desirable recombination

    3. As the generation advanced in pedigree method, selection is made between families rather than within families

    4. Pedigree method permits the breeder to exercise maximum of skill and judgment.

  28. Japanese Long Green is a variety of:

    1. Water-lon

    2. Cucumber

    3. Snake gourd

    4. Bottle gourd

  29. Which one of the following parts of the plant is considered free from viruses?

    1. Cambium

    2. Xylem

    3. Apical meristem

    4. Embryo