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

  1. Which one of the following herbicides kills both Phalaris minor and wild oats in wheat?

    1. Tok-25

    2. 2, 4 − D

    3. Tribunil

    4. Avadex

  2. Which one of the following can be included in rotation with rice crop?

    1. Sea ban la speciosa

    2. Sesbania rastrata

    3. Sesbania glandulosa

    4. Crotalaria juncea

  3. Which one of the following two-ar's crop rotations is of 166° o cropping intensity (CI)?

    1. Cotton-eat-ize-eat

    2. Cauliflower-dy's finger-rly potatomain potato-ize for green cobs

    3. Sugarcane-uster bean-eat

    4. Sugarcane-toon

  4. In early cropping, the flowering period of

    1. One crop always overlaps with that of the second crop

    2. One crop never overlaps with that of the second crop

    3. The first crop may or may not overlap with that of the second crop

    4. Crops grown is not relevant

  5. What is correct proportion of seed rate of wheat (W) and gram (G) for mixed sowing under inadequate irrigation condition?

    1. W-; G-

    2. W-; G-

    3. W-; G-

    4. W-; G-

  6. In the universal soil loss equation A = rKLSP K stands for

    1. Slope length

    2. Soil erodibility

    3. rainfall

    4. Cover and management

  7. Which of the following pair are correctly matched?

      • Oxic
      • A horizon enriched with Fe and Al
      • Mollic
      • A thick dar coloured mineral horizon with high (mor than 50%) base saturation
      • Ochric
      • A silicate clay enriched horizon
      • Argillic
      • A light-loured low organic matter content horizon

    Select the correct answer using the codes given below:

    1. 1 and 3

    2. 1 and 2

    3. 2 and 4

    4. 2 and 3

  8. In the statement ‘if soil A has a pH of 5 and soil B has a pH of 7. Then the acidity of soil A will be X times that of soil B.’ X stands for

    1. 2

    2. 5

    3. 10

    4. 100

  9. Kaolin tic clays ar able to satisfy the Ca ‘-’ requirement of most plants at calcium saturation value of

    1. 40 to 50%

    2. 50 to 60%

    3. 60 to 70%

    4. 70 to 80%

  10. The infrared spectrum of fulvic acid shows weak, medium strong and strong bands at

    1. 2980 to 2920.1720 and 3400 cm-1 respectively

    2. 1720.2980 to 2920 and 3400 cm-1 respectively

    3. 3400.1720 and 2980 to 2920 cm-1 respectively

    4. 2980 to 2920.3400 and 1720 cm-1 respectively

  11. Match List I (Organic soil) with List II (Natur of the soil) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Muck

    2. Mull

    3. Peat

    4. Mor

    1. Humus-ch forest soil with mixed organic and mineral matter

    2. Forest raw humus soil layer without incorporated organic matter

    3. Well decomposed organic soil with original plant parts not recognizable

    4. Organic soil with unrecompensed or partly decomposed partly decomposed organic matter

    • A
    • B
    • C
    • D
      • 3
      • 4
      • 1
      • 2
      • 4
      • 1
      • 3
      • 2
      • 2
      • 3
      • 4
      • 1
      • 3
      • 1
      • 4
      • 2
  12. Truncated profile

    1. represents a typical under developed profile

    2. Is one wher solum is buried underneath

    3. Is one that has a par of the solum removed by erosion

    4. Is one wher horizons cannot be distinguished

  13. Match List I (Scientists) with List II (Associated with) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. L D Baver

    2. H F Clements

    3. E John russel

    4. H E Shoemaker

    1. Crop logging technique

    2. Soil physics

    3. Buffer method for determining lime requirement of soils

    4. Roth Amsted experimental station, Harpenden

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 3
      • 4
      • 1
      • 2
      • 4
      • 3
      • 2
      • 1
      • 4
      • 3
  14. The ter residual acidity refer to

    1. Soil acidity that can be neutralized by alkaline material

    2. Acidity of hydrogen ion in the aqueous phase

    3. Acidity due to exchangeable hydrogen and aluminum

    4. Acidity which is determined after taking a crop

  15. Match List I (Instrument) with List II (Used to measure) and select the correct answer using the codes given below the:

    List-I List-II
    1. Tensiometer

    2. Piezometer

    3. Psychrometer

    4. Infiltrometer

    1. Matric suction in the soil

    2. Temperature

    3. rate of water entr into the soil

    4. Water pressur in the soil

    • A
    • B
    • C
    • D
      • 1
      • 4
      • 2
      • 3
      • 2
      • 3
      • 1
      • 4
      • 1
      • 4
      • 3
      • 2
      • 4
      • 1
      • 2
      • 3
  16. Consider the following symptoms of iron deficiency:

    1. Leaves turning entirely white

    2. Entirely leaves developing chlorosis

    3. Young leaves developing interveinal chlorosis

    The correct sequence in which these symptoms develop is

    1. 1, 2, 3

    2. 3, 1, 2

    3. 3, 2, 1

    4. 2, 3, 1

  17. Consider the following statements: In crops, phosphorus

    1. Is essential for flowering, fruiting and seed formation

    2. Helps to regulate the opening of stomata in the leaves

    3. Is essential for root development and crop maturation

    4. Is essential for the synthesis of chlorophyll and enzymes

    Of these statements

    1. 1 and 3 are correct

    2. 2 and 3 are correct

    3. 2 and 4 are correct

    4. 1 and 4 are correct

  18. Match List I (Bacteria) with List II (Function) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Nitrobacter spp.

    2. Ammonifying bacteria

    3. De4ntrifying bacteria

    4. rhizobium bacteria

    1. Fixation of atmospheric nitrogen

    2. Formation of NH4 nitrogen

    3. Formation of NO3 nitrogen

    4. Formation of N2 nitrogen

    • A
    • B
    • C
    • D
      • 3
      • 2
      • 1
      • 4
      • 2
      • 3
      • 1
      • 4
      • 3
      • 2
      • 4
      • 1
      • 2
      • 3
      • 4
      • 1
  19. The half-fe of U − 8 is 4.5 × 100 years. If the geological age of the earth is 2.5 × 100 year approximately, then the amount of original supply of U − 8 that has disappeared due to radioactive decay is

    1. 10%

    2. 25%

    3. 50%

    4. 75%

  20. Consider the following organic manures:

    1. Bat's guano

    2. Goat manure

    3. pig manute

    4. FYM

    The correct sequence in descending order in terms of nitrogen content of these manures is

    1. 1, 3, 2, 4

    2. 3, 2, 1, 4

    3. 3, 1, 4, 2

    4. 1, 3, 4, 2

  21. Match List I (Compound Material) with List II (Nutrient. Activity) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Thiourea

    2. Serpentine

    3. Ox amide

    4. rock phosphate

    1. Calcium

    2. Nitrification inhibitor

    3. Slow release N fertilizer

    4. Magnesium

    • A
    • B
    • C
    • D
      • 2
      • 4
      • 1
      • 3
      • 4
      • 2
      • 3
      • 1
      • 4
      • 2
      • 1
      • 3
      • 2
      • 4
      • 3
      • 1
  22. Which of the following pair are correctly matched?

      • Ammonium sulphate
      • Acidic
      • Calcium ammonium nitrate
      • Neutral
      • Potassium nitrate
      • Basic

    Select the correct answer using the codes given below:

    1. 1 and 2

    2. 2 and 3

    3. 1 and 3

    4. 1, 2 and 3

  23. Besides the soil reservoir components of integrated nutrient management include

    1. Inorganic fertilizer and organic manures

    2. Organic manures and biofertilizers

    3. Biofertilizer and inorganic fertilizers

    4. Inorganic fertilizers, organic manures and biofertilizers

  24. Consider the following statements: In rice, silicon is a functional element and is required in large quantities for

    1. Increasing water use efficiency

    2. Disease and pest resistance

    3. Normal growth of plant and uptake of other nutrients

    4. Spike let sterility control

    Of these statements

    1. 1 and 2 are correct

    2. 3 and 4 are correct

    3. 1.2 and 3 are correct

    4. 1, 2, 3 and 4 are correct

  25. In the statement ‘cell A has an osmotic potential of-bar and a pressure potential of 10 bar while cell B has an osmotic potential of-bar and a pressure potential of 2 bars: If both these cells are placed in contact with each other then water will flow from cell X to cell Y with a force of Z bars’ X, Y and Z stand respectively for

    1. A, B and-4

    2. A, B and-2

    3. B, A and-4

    4. B, A and-2

  26. Match List I (Deficiency disease) with List II (remedy) and select the correct answer using the codes given below the:

    List-I List-II
    1. ‘reclamation disease’ of cereals

    2. White bud of maize

    3. Whiptail of cauliflower

    4. Hollow hear of groundnut

    1. Ammonium molybdate

    2. Borax

    3. Copper sulphate

    4. Ferrous sulphate

    5. Zinc sulphate

    • A
    • B
    • C
    • D
      • 3
      • 4
      • 2
      • 5
      • 2
      • 4
      • 3
      • 1
      • 3
      • 5
      • 1
      • 2
      • 4
      • 5
      • 1
      • 2
  27. Potato is an indicator plant for which one of the following soil deficiencies?

    1. Potassium

    2. Calcium

    3. Nitrogen

    4. Phosphorus

  28. Match List I (Enzymes) with List II (reactions) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Fumarase

    2. Aconitase

    3. Succinicde hydrogenase

    4. Succinic acid thiokinase

    1. Conversion of succinyl CoA to succinic acid

    2. Conversion of succinic acid to fumaric acid

    3. Conversion of furmaric acid to 1-lic acid

    4. Conversion of citric acid into isocitric acid

    • A
    • B
    • C
    • D
      • 3
      • 4
      • 1
      • 2
      • 4
      • 3
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 4
      • 3
      • 2
      • 1
  29. Which of the following biochemical mechanisms ar associated with photosynthesis?

    1. A given amount of light supplied in shor flashes separated by dark period's increases photosynthetic yield when compared to uninterrupted supply of light of same intensity.

    2. When continuous light is supplied the rate of photosynthesis is limed by dark reaction.

    3. Two thousand chlorophyll units are involved in the fixation or reduction of one molecule of Co2.

    4. Photosynthesis consists of two (cyclic and non-clic) photochemical reactions and the major function is to produce ATr

    Select the correct answer using the codes given below:

    1. 1, 2, 3 and 4

    2. 1, 2 and 3

    3. 3 and 4

    4. 1, 2 and 4

  30. Under inductive photoperiod, the flowering of a plant is inhibited if the dark period is interrupted by a flash of light. Such a type of plant is known as

    1. Qualitative short-y plant

    2. Qualitative long-y plant

    3. Day-utral plant

    4. Quantitative long-y plant

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