WAEC - Agricultural Science (2012)

  • 1
    Agricultural production in West Africa can be improved by the following practices except the
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    (B)
    legislation of communal land holding system
  • 2
    A limitation to the practice of shifting cultivation in modern day agriculture is
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    (C)
    population pressure
  • 3
    Government finances agriculture through the following means except
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    (C)
    establishment of agricultural colleges
  • 4
    The following are factors that affect agricultural development in West Africa except
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    (B)
    rainfall
  • 5
    Termites are useful in agriculture because they
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    (C)
    improve soil aeration
  • 6
    A fresh soil sample of mass 180 g had a mass of 120 g after oven-drying. Determine the percentage water content of the soil.
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    (D)
    33.3%
  • 7
    The earthworm is important to the farmer because it
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    (A)
    improves soil texture
  • 8
    The soil water that is readily available for absorption by plant roots is called
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    (A)
    capillary water
  • 9
    Farmers practice mixed farming because they can
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    (C)
    use the manure from the animals to fertilize their crops
  • 10
    Which of the following factors should be considered in selecting cover crops? The cover crops must I. be easy to propagate II. compete with the main crops III. have roots capable of binding soils IV. be slow growing
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    (C)
    I and III only
  • 11
    Which of the following terms is not associated with surface irrigation?
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    (A)
    tile
  • 12
    Loss of nitrogen from the soil through the removal of oxygen from nitrates by bacteria is known as
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    (C)
    dentrification
  • 13
    Which of the following statement are advantages of mulching? It I. controls weeds II. conserves soil moisture III. increases soil temperature IV. reduces soil pH
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    (A)
    I and II only
  • 14
    Determine the weight of potassium in a 50 kg NPK (20:20:10) bag of fertilizer.
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    (C)
    10.0 kg
  • 15
    The farm power which is most adaptable to farm operation in West Africa is
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    (C)
    human power
  • 16
    If grains are not properly dried before storage, they are likely to
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    (A)
    lose viability at a fast rate
  • 17
    Which of the following combinations of activities gives the correct sequence of nursing seeds? I. watering of sown seeds II. making drills with a dibber III. covering seeds with palm fronds IV. sowing seeds in drills
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    (A)
    II,IV,III and I
  • 18
    If the recommended spacing for a tree crop is 2.5m by 4.0m. How many seedlings are required to plant 2 hectares of farmland?
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    (C)
    2,000 seedlings
  • 19
    Which of the following processes are associated with rubber production? I. coagulation II. fermentation III. tapping
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    (B)
    I and III only
  • 20
    The following crops require staking except
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    (D)
    guinea corn
  • 21
    The frequency of weed control on a tomato farm does not depend on
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    (C)
    nearness to homestead
  • 22
    Citrus is usually propagated by
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    (A)
    budding
  • 23
    The botanical name of groundnut is
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    (B)
    arachis hypogaea
  • 24
    Ornamental plants reduce noise pollution in the environment by
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    (C)
    dispersing sound waves
  • 25
    Which of the following statement about the effects of diseases on crops are true? Reduction in I. quality of products II. photosynthetic ability III. cost of production IV. yield of the produce
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    (D)
    I,II and IV only
  • 26
    Which of the following insect-pests possesses biting and chewing mouthparts?
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    (A)
    grasshopper
  • 27
    Striga spp. is a parasitic weed of
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    (D)
    sorghum
  • 28
    The first activity to undertake before establishing a plantation is to
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    (A)
    survey the land
  • 29
    Fruits should be harvested at the appropriate time in order to
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    (D)
    ensure good quality produce
  • 30
    Which of the following crops are useful to the soap-making industry? I. kolanut II. coconut III. shea nut
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    (C)
    II and III only
  • 31
    An advantage of rotational grazing is that
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    (B)
    there is greter potential for extending the grazing season
  • 32
    A sheep grained 20 kg of weight after consuming 60 kg of feed. Determine the feed conversion ratio.
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    (C)
    3:1
  • 33
    A disease which affects poultry only is
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    (C)
    pox
  • 34
    Which of the following factors have negative influence on egg weight? I. high environmental temperature II. poor lighting III. comb size
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    (A)
    I and II only
  • 35
    Fish ponds in arid areas should be deeper than those in the rain forests in order to
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    (B)
    prevent loss of fish through extreme of temperatures
  • 36
    In sheep production, litter is put on the floor mainly to
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    (C)
    reduce the incidence of pneumonia in lambs
  • 37
    Determine the number of pigs that can be housed in a pigsty measuring 5.0 m by 4.0 m, if the floor space for a pig is 2.0m2.
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    (A)
    10
  • 38
    The type of weed control involved when tilapia feeds on aquatic weeds is
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    (A)
    biological
  • 39
    Which of the following statement about cross breeding in farm animals is false?
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    (C)
    it is a practice of improving poultry production
  • 40
    On which of the following criteria is pedigree selection in animal improvement based?
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    (A)
    performance of the ancestors
  • 41
    Which of the following symptoms is typical of louse infestation in livestock?
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    (A)
    itching of the body
  • 42
    Which of the following statement about herbivores are true? I. non-ruminant herbivores have long ceaca II. non-ruminant herbivores have complex stomach III. ruminant herbivores chew the cud
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    (B)
    I and III only
  • 43
    If an injured goat bleeds without clotting, it is likely that the goat is deficient in
    Antwoord
    (B)
    vitamin K
  • 44
    Determine the cost price of a farm equipment that has a salvage value of N500,000.00, a useful life of 10 years and an annual depreciation of N400,000.00.
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    (C)
    N4,500,000.00
  • 45
    An example of long-term liability of a farmer is
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    (C)
    salary