WAEC - Agricultural Science (2021)

  • 1
    The branch of crop science which deals with the study of insect pests is 
    Jawab
    (C)
    entomology
  • 2
    Horse racing and polo are events where horses are used for
    Jawab
    (B)
    recreation
  • 3
    The construction of rural feeder roads solves the following access problems in agriculture except
    Jawab
    (D)
    land tenure system
  • 4

    The diagram above illustrates a farm tool. Use it to answer this question.
     

    The illustrated farm tool is used for

    Jawab
    (A)
    making mounds
  • 5

    The diagram above illustrates a farm tool. Use it to answer this question.

    The farm implement that could perform a similar function as the illustrated tool is

    Jawab
    (C)
    ridger
  • 6
    A tractor-mounted sprayer used on large scale farms is the
    Jawab
    (B)
    motorised sprayer
  • 7
    Which of the following types of farm power does not cause pollution?
    Jawab
    (A)
    hydro
  • 8
    In planning a farmstead, the structure which should be located on high elevation is the 
    Jawab
    (C)
    farmhouse
  • 9

    The diagram below illustrates processes in the water cycle. Use it to answer this question.

    The process labelled I is.

    Jawab
    (D)
    transpiration
  • 10

    The diagram below illustrates processes in the water cycle. Use it to answer this question.

    The process labelled II is

    Jawab
    (C)
    evaporation
  • 11

    The major source of water to the plants in the diagram is 

    Jawab
    (C)
    capillary water
  • 12
    The new rock formed when limestone is subjected to great heat and pressure is
    Jawab
    (D)
    gneiss
  • 13
    Which of the following pairs of raw materials is used in the canning industry
    Jawab
    (A)
    meat and fish
  • 14
    Microorganisms that decompose organic matter will function best under 
    Jawab
    (D)
    optimum soil PH
  • 15

    In an experiment determine the percentage of organic matter in a soil sample, the following data was collected; weight of over-dried soil before burning = 50g
    weight of over-dried soil after burning = 28g. Use the information to answer this question.

    Calculate the weight of organic matter in the soil

    Jawab
    (B)
    22g
  • 16

    In an experiment determine the percentage of organic matter in a soil sample, the following data was collected; weight of over-dried soil before burning = 50g
    weight of over-dried soil after burning = 28g. Use the information to answer this question.

    Determine the percentage of organic matter in the soil 

    Jawab
    (B)
    44%
  • 17
    Which of the following practices will improve clay soil?
    Jawab
    (D)
    addition of organic material
  • 18
    A farmer practices crop rotation in order to
    Jawab
    (D)
    improve soil fertility
  • 19
    The phosphorus cycle is described as being sedimentary because phosphorus 
    Jawab
    (A)
    is a macroelement
  • 20
    The following factors are essential for maize production except 
    Jawab
    (A)
    high temperature
  • 21
    Drying of newly harvested grains before storage helps to increase the 
    Jawab
    (C)
    seed viability
  • 22
    Yam stored in a barn should be inspected at least once a week in order to
    Jawab
    (D)
    remove sprouts and rotten tubers
  • 23
    The botanical name of onion is
    Jawab
    (D)
    Allium cepa
  • 24
    Okro seeds are sown on 0.72 hectares of farmland at a spacing of 60cm. Calculate the expected plant population 
    Jawab
    (D)
    20,000 plants
  • 25
    A plot of land devoted to the cultivation of fruit  trees is called
    Jawab
    (A)
    orchard
  • 26
    Two species of kola grown for commercial purposes in West Africa are
    Jawab
    (B)
    Cola nitida and cola verticillata
  • 27
    Propagation of ginger is generally done using it's
    Jawab
    (B)
    rhizome
  • 28
    Elaeis guineensis and Arachis hypogaea are examples of
    Jawab
    (B)
    oil crops
  • 29

    The diagram below illustrates a farm operation. Study it and answer this question.

    Which of the following statements is not a reason for carrying out the illustrated farm operation? To

    Jawab
    (D)
    prevent lodging of the plants
  • 30

    The diagram below illustrates a farm operation. Study it and answer this question.

    Crops which require the illustrated farm operation are

    Jawab
    (D)
    tomato and yam
  • 31
    The basic importance of agriculture to a forester is to 
    Jawab
    (D)
    procure timber
  • 32
    A suitable grass for lawns is 
    Jawab
    (D)
    Panicum maximum
  • 33
    The causative organism of maize rust is a 
    Jawab
    (D)
    fungus
  • 34
    Which of the following groups of insect pests damages crops by bitting and chewing?
    Jawab
    (C)
    armyworm, termite nd grasshopper
  • 35
    The breeds of cattle resistant to trypanosomiasis are
    Jawab
    (A)
    N'dama and moturu
  • 36
    Which of the following features is not a characteristic of a good layer
    Jawab
    (A)
    Bright red comb and wattle
  • 37
    The best way for a young animal to obtain colostrum is by
    Jawab
    (D)
    allowing it to suckle the dam
  • 38
    Which of the following statement about slatted floors in livestock housing are true? They
    I.lessen labour requirements
    II.reduce odour in pens
    III.hamper movement of animals
    Jawab
    (C)
    II and III only
  • 39
    If 0.7kg of feed was fed to chicks per week, determine the cost of feeding the birds for 6 weeks. (1kg of feed costs #5)
    Jawab
    (C)
    #21.00
  • 40
    Feeds that have more than 18% fibre are classified as 
    Jawab
    (D)
    roughages
  • 41
    An advantage of zero-grazing is that it
    Jawab
    (C)
    prevents depletion of pasture
  • 42

    The diagram above illustrates a tool used in animal production. use it to answer this question.

    The illustrated tool is

    Jawab
    (D)
    an artificial vagina
  • 43
    Formation of blisters on the mouth and the skin around the hoof of farm animals is a symptom of 
    Jawab
    (D)
    foot and mouth disease
  • 44
    In sheep production, tapeworm could be controlled by 
    Jawab
    (C)
    dipping
  • 45

    The table below illustrates the supply schedule of maize. Use it to answer this question.

        PRICE(#)   QUANTITY SUPPLIED(kg)
      24  480
      16  400

    The percentage change in quantity supplied for maize is

     

    Jawab
    (A)
    16.7%