WAEC - Agricultural Science (2023)

  • 1
    Seedlings are best transplanted in the field
    Answer
    (A)
    early in the morning and late in the evening
  • 2
    If 200 ml of water was poured on a soil sample in a beaker and 25% of the water drained through the soil, determine the amount of water retained in the soil.
    Answer
    (D)
    150 ml
  • 3
    A combine harvester is mainly used for harvesting
    Answer
    (D)
    rice
  • 4

    The diagram above illustrates a reproductive process in a farm animal. Study it and answer the question.
    The reproductive process illustrated by the diagram is

    Answer
    (B)
    gestation
  • 5

    The diagram above illustrates a reproductive process in a farm animal. Study it and answer the question.
    The parts which protect the foetus from mechanical injury are labelled

    Answer
    (B)
    I and II
  • 6

    The diagram below illustrates a reproductive process in a farm animal. Study it and answer the question.
    The foetus obtains dissolved oxygen and nutrients from the dam through the parts labelled

    Answer
    (D)
    III and IV
  • 7
    The risk of production in agricultural business is borne by the
    Answer
    (A)
    farm owner
  • 8
    The bacterium which is responsible for conversion of ammonium compounds to nitrites in the nitrogen cycle is
    Answer
    (B)
    Rhizobium
  • 9

    Study the table below and use it to answer the question

     

     Cost Price (N)  Useful Life (Life)  Salvage value (N)  Annual depreciation (N)  Total depreciation
     20000  Y  5000  1000 annum  15000
     60000  10  18000  4200 annum  Z



    The useful life represented by Y in the illustrated table is

    Answer
    (C)
    15 years
  • 10

    Study the table below and use it to answer the question

     Cost Price (N)  Useful life (Years)  Salvage value (N)  Annual depreciation (N)  Total depreciation
     20000  Y  5000  1000 annum  15000
     60000  10  18000  4200 annum  Z

     

    The total depreciation represented by Z in the illustrated table is

    Answer
    (A)
    N 42,000
  • 11
    High relative humidity in a brooder house could lead to
    Answer
    (C)
    build up of pests and diseases
  • 12
    Examples of cover crops are
    Answer
    (A)
    Centrosema pubescens and Mucuna utilis
  • 13
    Which of the following tools are used in soil analysis?
    I. pH meter
    II. Sieve
    III. Hygrometer
    Answer
    (C)
    I, II and III
  • 14
    The reduction of three seedlings of maize to two plants per stand is referred to as
    Answer
    (B)
    thinning
  • 15
    Cotton stainer is an insect pest of
    Answer
    (A)
    cotton
  • 16
    Day-neutral crops are crops that produce flowers regardless of
    Answer
    (C)
    amount of sunlight received by flowering plants
  • 17
    Rural-urban migration of farm labour could be prevented by
    Answer
    (D)
    establishing agro-based industries in villages
  • 18

    The diagrams below illustrate different sources of farm power. Study them and answer the question.
    Which of the illustrated sources of farm power is the cheapest

    Answer
    (D)
    I
  • 19

    The diagrams below illustrate different sources of farm power. Study them and answer the question.
    The machinery illustrated in diagram III could be used to power
    I. planters
    II. dryers
    III. sprayers

    Answer
    (D)
    I, II and III
  • 20

    The diagrams below illustrate different sources of farm power. Study them and answer the question.
    Which of the illustrated sources of farm power decrease in efficiency due to constant use?

    Answer
    (D)
    I, II and III
  • 21
    Post-planting operations in cocoa plantation include
    I. rogueing
    II. stumping
    III. mulching
    Answer
    (B)
    I, II and III
  • 22
    A major reason for encouraging afforestation in arid regions of West Africa is to
    Answer
    (B)
    serve as windbreak to check desert encroachment
  • 23
    The farming system generally recommended for farm settlement scheme is
    Answer
    (D)
    mixed farming
  • 24
    Which of the following products is not a primary forest product?
    Answer
    (A)
    Plup
  • 25
    A pest of honeybee is
    Answer
    (B)
    grasshopper
  • 26
    In order to backup extension messages, an extension agent should
    Answer
    (B)
    assist farmers in locating sources of farm inputs
  • 27
    The storage structure usually installed by the government for bulk storage of grains in West Africa is
    Answer
    (D)
    silo
  • 28
    Monocotyledonous crops are characterized by
    Answer
    (A)
    parallel-veined leaves
  • 29
    Steaming up ration should be fed to
    Answer
    (A)
    pregnant animals
  • 30
    Which of the following paring enterprise could best be combined with fish farming for mutual benefits?
    I. Vegetable production
    II. Beekeeping
    III. Poultry production
    Answer
    (A)
    I and III only
  • 31
    The number of teats in the udder of a cow is
    Answer
    (A)
    four
  • 32
    The part of a disc plough to which discs are connected is
    Answer
    (B)
    standard
  • 33
    Grading of farm produce is important because it
    Answer
    (C)
    facilitates pricing
  • 34
    Which of the following statements about underground drainage is true
    Answer
    (D)
    Water seeps into tiles to reach an outlet where it is discharged
  • 35
    Which of the following pairs of livestock diseases could be contracted through inhalation?
    Answer
    (B)
    Newcastle disease and aspergillosis
  • 36
    Maceration is carried out in the processing of
    Answer
    (B)
    oil palm
  • 37
    If the seed rate for the cultivation of cowpea is 25 kg per hectare, determine the quantity of cowpea seeds required to cultivate a farmland measuring 100 m by 500 m.
    Answer
    (A)
    125 kg
  • 38
    A beneficial effect of bush burning is that it
    Answer
    (C)
    encourages the regeneration of grasses
  • 39

    The diagram above illustrates a farm operation. Study it and answer the question
    The illustrated farm operation is known as

    Answer
    (A)
    winnowing
  • 40

    The diagram above illustrates a farm operation. Study it and answer the question
    Examples of crops which require the illustrated farm operation are

    Answer
    (C)
    rice, groundnut and millet
  • 41
    Ornamental plants are primarily cultivated to
    Answer
    (B)
    beautify the environment
  • 42

    The diagram above illustrates a method of compost making. Study it and answer the question.

    The method of compost milking illustrated in the diagram is

    Answer
    (D)
    pit
  • 43

    The diagram above illustrates a method of compost making. Study it and answer the question.

    The part labelled I is used for

    Answer
    (C)
    turning the compost materials
  • 44

    The diagram above illustrates a method of compost making. Study it and answer the question.

    A material that could be used as starter in the method of compost making illustrated is

    Answer
    (D)
    Urine
  • 45
    Soil structure is described as the
    Answer
    (D)
    arrangement of soil particles into aggregates