Competitive Exams: Agriculture MCQs (Practice-Test 30 of 56)

  1. What cultur should be given priority in groundnut cultivation?

    1. Azosp rilla

    2. Mycorrhiza

    3. Phosphobacteria

    4. rhizobia

  2. Which one of the following concentrated organic manures has maximum phosphorus content?

    1. Fish meal

    2. Sterameal

    3. Poultr manure

    4. Guano

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

    List-I (Classes of fertiliser) List-II (Example of different classes)
    1. Organic fertiliser

    2. Inorganic fertiliser

    3. Biofertiliser

    4. Slow release fertilizer

    1. Urea

    2. Isobutylidenediurea

    3. Ammonium sulphate

    4. Azolla

    5. 2-isloro-pyridene

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 5
      • 1
      • 3
      • 4
      • 2
      • 2
      • 1
      • 5
      • 4
      • 5
      • 1
      • 4
      • 3
  4. What is the effect of application of phosphatic fertilizer to a green manure leguminous cropon the availability of phosphorus to the succeeding crop?

    1. Greater amount of phosphorus is taken up and converted into organic form, which is released on decomposition of green matter

    2. Green manur increases the availability in inorganic for to the next crop

    3. It does not affect the availability of phosphorus to succeeding crop

    4. It fixes the phosphorus through humus and reduces the availability

  5. The nitrogenous fertilizer manufactured in India which occupies the first place in production is

    1. Ammonium sulphate

    2. Ammonium phosphate

    3. Urea

    4. Calcium ammonium nitrate

  6. Which one of the following fertiliser is least hygroscopic?

    1. Urea

    2. Ammonium sulphate

    3. Ammonium phosphate

    4. Calcium ammonium nitrate

  7. Diammonium phosphate requirement for supplying 45 kg N and 115 kg P2O5 to one hectar peanut crop is

    1. 100kg

    2. 150kg

    3. 200kg

    4. 250kg

  8. Maximum absorption of water by roots takes place thr ugh the

    1. One of elongation

    2. Zone of maturation

    3. root hair

    4. root cap

  9. Long distance translocation of nitrogenous assimilations in plants occurs

    1. Through cambium only

    2. Mainly through the phloem

    3. Mainly through the xylem

    4. Equally through xylem, phloem and cambium

  10. Zinc, iron, copper boron, manganese and molybdenum ar called micronutrients because they are

    1. Nutrients of microscopic significance

    2. Nutrients which produce microscopic effects

    3. Essential nutrients but ar required in minute quantities

    4. Nutrients required by micro-ganisms

  11. Which one of the following often acts as the limiting factor in photosynthesis under Indian conditions?

    1. Sunlight

    2. Carbon dioxide

    3. Water

    4. Chlorophyll

  12. The strongest chemical agent for breaking dormancy is

    1. Potassium nitrate

    2. Gibberellins

    3. Ethylene

    4. Cumerin

  13. The optimum cardinal temperatur points for germination of rice seeds are

    1. 18 − 20° C

    2. 20 − 22° C

    3. 30-° C

    4. 37-° C

  14. All cytokinins ar derivatives of

    1. Cytosine

    2. Adenine

    3. Uracil

    4. Guanine

  15. Under normal aerobic conditions, pyruvic acid is oxidized to carbon dioxide and water in celldar organelles known as

    1. Golgi apparatus

    2. ribosome

    3. Chloroplast

    4. Mitochondria

  16. Interveinal chlorosis of the younger leaves of the plants is the characteristic symptom of

    1. Boron deficiency

    2. Zinc deficiency

    3. Iron deficiency

    4. Phosphorus deficiency

  17. The high yielding rust resistant wheat variety ‘Kalyan sona’ became susceptible to rust some year after its release and cultivation because of

    1. Variation in the environment

    2. Mutation in the host plant

    3. resurgence on the par of the pathogen

    4. Emergence of new races in the pathogen

  18. The first maize hybrid developed in India was

    1. Vikram

    2. Ganga-2

    3. Vijay

    4. Kissan

  19. What is the correct sequence of the following for the production of hybrid maize?

    1. Selfing selected open-llinated populations through several generations to produce homozygous inbred lines.

    2. Selecting desirable plants in openpollinated populations.

    3. Crossing chosen lines.

    Select the correct answer using the codes given below:

    1. 1, 2 and 3

    2. 2, 3 and 1

    3. 2, land 3

    4. 3, 2 and 1

  20. Genetics is the study of

    1. Genes

    2. Gene Interaction

    3. Heredity and Variation

    4. DNA

  21. At the molecular level point mutations are due to

    1. Destruction of the bases

    2. Destruction of the double helix

    3. Shifting of a portion of the helix and bases

    4. Alterations of sequences of base in

    DNA

  22. The rice variety containing Dee-owoogen gene is

    1. Indrasan

    2. Basmati

    3. Tilak

    4. I. r. 8

  23. Specific combining ability of the parents should be high in order to develop

    1. Hybrids

    2. Composites

    3. Varieties

    4. Synthetics

  24. A population at equilibrium, developed from intermitting a number of inbred lines is called a

    1. Composite variety

    2. Synthetic variety

    3. Hybrid variety

    4. Pur line variety

  25. In sorghum, somatic chromosome number is 20. What would be its chromosome number in the endosperm?

    1. 10

    2. 20

    3. 30

    4. 40

  26. Heterosis is commercially exploited in

    1. Cross pollinated species

    2. Often cross-llinated species

    3. Self-llinated species

    4. Vegetatively propagated species

  27. In which one of the following crops maximum exploitation of hybrid vigour during last three decades has been done?

    1. Wheat

    2. rice

    3. Maize

    4. Cotton

  28. A hornozygous line developed by selffertilization in a cross-llinated crop is termed as

    1. Pureline

    2. Inbred

    3. Clone

    4. Mutant

  29. Ther ar four stages of development of Genetics up to 20th Century. The correct order of their occurrence is

    1. Darwinism, Lamarckism, Mendelism, Weismannism

    2. Lamarckism, Darwinism. Weismannism, Mendelism

    3. Lamarckism, Weismannism, Darwinism, Mendelism

    4. Weismannism, Lamarckism

    Darwinism, Mendelism

  30. A method of breeding most commonly used when the desired variation is required to be induced in a vegetatively propagated crop is

    1. Polyploidy breeding

    2. Pedigree method of breeding

    3. Mutation breeding

    4. Backcross method of breeding