Competitive Exams: Agriculture MCQs (Practice-Test 42 of 56)

  1. The unconsolidated material on the underlying rock called

    1. regolith

    2. Soil

    3. Solum

    4. Earth

  2. If a soil has a bulk density of 1.50 mg/m3 and a particle density of 2.65 mg/m3 than the percentage por space of that soil will be

    1. 35.0

    2. 38.5

    3. 53.4

    4. 48.5

  3. Active soil forming factor would include

    1. Vegetation and to pography

    2. Time, topography and climate

    3. Time, and vegetation

    4. Vegetation and climate

  4. The black cotton soils of central India have been derived from

    1. Granites

    2. Grandiosities

    3. Basalt

    4. rhyolite

  5. Which one of the following minerals is LEAST weather able in soil?

    1. Olivine

    2. Quartz

    3. Calcite

    4. Biotitic

  6. The given diagram is that of soil textural triangle. A soil having 15% clay, 65% sand and 20% silt will be classified on the basis of the given diagram, as Figur (Triangle)

    1. Sandy clay loam

    2. Loam

    3. Loamy sand

    4. Sandy loam

  7. Match List I (Microbial reaction) with List II (Soil organisms) and select the correct answer:

    List-I List-II
    1. Sulphate reduction

    2. Sulphite oxidation

    3. Nitrate oxidation

    4. Nitrogen fixation

    1. Thiobacillus

    2. Desulfotomaculum

    3. rhodospirillum

    4. Nitrobactor

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 4
      • 3
      • 2
      • 1
      • 3
      • 4
      • 1
      • 2
      • 4
      • 3
  8. Properties of four different soils are given in the following table

    • Soil property Soils Soil I Soil II Soil III Soil IV Organic matter (%)
    • 3.1 0.8 2.0 0.4
    • Clay (%) 38.1 10.0 30.2 12.0
    • Sand (%) 51.2 74.0 50.1 70.0
    • Type o clay (%) 2: 1 1: 1 2: 1 1: 1 pH 5.2 5.2 5.2 5.2

    Which one of these soils will requir the largest quantity of lime to raise its pH to 65?

    1. Soil I

    2. Soil II

    3. Soil III

    4. Soil IV

  9. The given char shows the classification of irrigation water: Irrigation water having Na + = 15 me/liter (Ca2 + Mg2 + ), = 8 me/liter and conductivity = EC-106 = 2300 umho/cm can be classified as

    1. C4S2

    2. C3S3

    3. C4S3

    4. C1S1

  10. The following figur shows the relationship between nutrient concentration in the plants and yield of crops: Which protein (s) of the curve fall (s) in hidden hunger zone?

    1. A and B

    2. B and C

    3. B and C

    4. A alone

  11. The best estimate of the available P in phosphatic fertilizer is obtained from the

    1. Water soluble fraction

    2. Citrate-soluble fraction

    3. Citrate soluble fraction

    4. Water soluble and citrate soluble fractions

  12. Given that dy/dx>1 then increase of yield per unit of growth factor A = maximum yield Y = Yield without growth factor C = a constant Mitcherlich equation for evaluation of soil fertility is given

    1. dy (A y) C/dx = 2

    2. dy (Y A) C/dx = 1

    3. dy (A y)/dx<1

    4. dy (A Y) C/dx>1

  13. E-blue is

    1. Defined as the isotopic ally exchangeable P in the soil and soil solution as determined by crop uptake

    2. Defined as the isotopically exchangeable P in the soil as determined by 32P

    3. The same as the L-lue

    4. The difference between A and L values

  14. Consider the following statements: Vermicom post is considered to be better because

    1. It does not requir turning of compost material

    2. It needs less composting time

    3. It takes place at a comparatively low temperature

    4. It has higher enzymatic activity

    Of these statements

    1. 1, 2, 3 and 4 are correct

    2. 1 and 2 are correct

    3. 2, 3 and 4 are correct

    4. 1, 3 and 4 are correct

  15. Match List I with List II and select the correct answer:

    List-I List-II
    1. Gypsum

    2. 17: 17: 17

    3. Serpentine

    4. Chelates

    1. Magnesium fertilizer

    2. Micronutrient fertilizer

    3. Calcium fertilizer

    4. Compound/complex fertilizer

    • A
    • B
    • C
    • D
      • 3
      • 2
      • 1
      • 4
      • 3
      • 4
      • 1
      • 2
      • 1
      • 2
      • 3
      • 4
      • 1
      • 4
      • 3
      • 2
  16. Sulphate of Potash is preferable to Muriate of Potash (MOP) for tobacco because

    1. The chlorine in the MOP affects the burning quality of tobacco

    2. The chlorine in the MOP increases the nicotine content of tobacco

    3. The application of MOP results in the luxur consumption of potassium

    4. The sulphate iron helps to increase the availability of other nutrients

  17. Match List I (reactants used for the preparation of fertilizers) with List II (Fertilizer produced) and select the correct answer:

    List-I List-II
    1. rock phosphate, phosphoric acid

    2. rock phosphate, phosphoric acid nitric acid, ammonia

    3. Ammonia, gypsum CO2

    4. Ammonia CO2

    1. Urea

    2. Ammonium sulphate

    3. Nitr phosphate

    4. Concentrated super phosphate

    • A
    • B
    • C
    • D
      • 4
      • 3
      • 1
      • 2
      • 4
      • 3
      • 2
      • 1
      • 3
      • 4
      • 2
      • 1
      • 3
      • 4
      • 1
      • 2
  18. Entr of potassium ions root hair in soils having a low potassium ion content in the soil is mediated through

    1. Ion exchange through

    2. Mass flow phenomenon

    3. Donnan equilibrium process

    4. Utilization of metabolic energy

  19. Consider the following statements: According to cohesion theor for the ascent of sap, water moves from the roots through the stems to the leaves in tall trees because of

    1. Forces of root pressure.

    2. The gradient in decreasing water potentials from the soil, through the plant to the leaves.

    3. Forces of adhesion of water to cell walls, especially in the leaves.

    4. Forces of cohesion between water molecules.

    Of these statements

    1. 1, 2 and 3 are correct

    2. 2, 3 and 4 are correct

    3. 1, 3 and 4 are correct

    4. 1, 2 and 4 are correct

  20. Which one of the following physiological processes requires close coordination of three different organdies such as mitochondria, chloroplast and peroxisome?

    1. Photosynthesis

    2. Photorespiration

    3. repiration

    4. Protein synthesis

  21. Which of the following ar characteristic of C4 plants?

    1. Ther ar two CO2 acceptor namely PEP and ruBP

    2. ruBP carboxylase is present in the mesophyll cells.

    3. The first stable product is a 4-rbon compounds.

    4. Oxygen does not have any inhibitory effect on the process.

    Select the correct answer using the codes given below:

    1. 1, 2 and 4

    2. 1, 3 and 4

    3. 2, 3 and 4

    4. 1, 2 and 3

  22. Which one of the following is a set of high energy products of the light reaction of photosynthesis that ar used in dark reaction?

    1. ATP and plastocynine

    2. ATP and NADP

    3. ATP and (NADPH + H + )

    4. Plastoquinone and ferridoxine

  23. Which of the following pair of hormones and bioassay techniques are correctly matched?

      • Cytokinin
      • Radish cotyledon test
      • Gibherellic acid
      • Rice second leaf test
      • Indole
      • Acetic acid oleoptile curvatur test

    Select the correct answer using the codes given below:

    1. 2 and 3

    2. 1 and 2

    3. 1 and 3

    4. 1, 2 and 3

  24. Which of the following statements about carotenoids are correct?

    1. Carotenoids present in coleoptile affect the destruction of auxin by light.

    2. Pollens generally carried by insects for pollination contains carotenes whereas carotenoild pigments ar rarely detected in pollens of wind pollinated flowers.

    3. They cause a suitable drop in light intensity leading to a gradient of increasing auxin concentration from the lighted side to the darker side.

    4. They absor blue light to produce phototropic curvatur in oat coleoptiles in phycomyces and also in certain blue-een algae.

    Select the correct answer using the codes given below:

    1. 2, 3 and 4

    2. 1.2 and 4

    3. 1, 3 and 4

    4. 1.2 and 3

  25. Match List I (Sources of character) with List II (Character exploited) and select the correct answer:

    List-I List-II
    1. Norin-

    2. Opaque-2

    3. Dee-e-o-n

    4. Lr genes

    1. resistance to Puccinia recondite causing leaf rust in wheat

    2. Semi dwarfing habit in rice

    3. Protein content in maize

    4. Shor statur in wheat

    • A
    • B
    • C
    • D
      • 4
      • 3
      • 1
      • 2
      • 4
      • 3
      • 2
      • 1
      • 3
      • 4
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
  26. Given that the somatic chrom9osome number of Triticum aestivum is 2n = 6x = 42, which one of the following pair is correctly matched?

      • Monosome
      • N = 40
      • Trisome
      • 2n = 42
      • Tetrasome
      • = 41
      • Nullisome
      • 2n = 41
  27. When breaks occur in two chromosomes simultaneously in a nucleolus and the broken chromosomes rejoin in a new maner it results in

    1. Deletion

    2. Duplication

    3. Translocation

    4. Inversion

  28. Consider the following statements:

    1. Heterochromatin is concentrated near the nuclear envelope and near the nucleolus.

    2. Eurchromation is visible during interphone and is distributed throughout the nuceloplasm

    3. Euchromatin is concentrated near the nucleolus and near the nuclear envelope

    Of these statements

    1. 1, 2 and 3 are correct

    2. 1 and 2 are correct

    3. 2 and 3 are correct

    4. 1 and 3 are correct

  29. The segregation of individuals in the F2 or ion a later generation of a cross, which shows a mor extreme development of a character than either parent is termed as

    1. Hybridization

    2. Heterosis

    3. Linkage

    4. Transgress segregates

  30. Heritability maybe defined as the

    1. Interaction product of genotype with environment

    2. Sum total of hereditar material present in a species

    3. Degree of resemblance between the original and the selected plants

    4. Proportion of phenotypic variability variability which is due to heredity