JAMB - Agricultural Science (2021)

  • 1
    The primary role of agriculture is the provision of
    Atsakymas
    (C)
    food for man and his animals
  • 2
    In subsistence agriculture
    Atsakymas
    (B)
    surplus produce is small
  • 3
    Gestation period is defined as the time
    Atsakymas
    (B)
    between conception and parturition
  • 4
    The hormone responsible for milk let down in female farm animals is
    Atsakymas
    (C)
    Oxytosin
  • 5
    The adult male cattle is called
    Atsakymas
    (A)
    bull
  • 6
    Layer's ration contains more limestone than grower's ration because limestone
    Atsakymas
    (D)
    supplies sufficient minerals to layers for shell formation
  • 7
    Which of the following is not a method of improving rangeland?
    Atsakymas
    (A)
    practicing continuous grazing
  • 8
    Miracidium is one of the stages in the life cycle of
    Atsakymas
    (B)
    liver fluke
  • 9
    Which of the following is not a symptom of foot and mouth disease of cattle?
    Atsakymas
    (D)
    blood stained diarrhea
  • 10
    Heavy infestation of liver fluke causes poor absorption of fats in livestock by
    Atsakymas
    (D)
    inhibiting the action of digestive enzymes
  • 11
    Methods of preserving fish include the following except
    Atsakymas
    (A)
    boiling
  • 12
    Which of the following fishing gears can be used for total harvesting of pond?
    Atsakymas
    (D)
    dragnet
  • 13
    The practice of mating closely related animals is called
    Atsakymas
    (D)
    inbreeding
  • 14
    The natural resource utilized for production is
    Atsakymas
    (D)
    land
  • 15
    An increase in supply of agricultural produce can be caused by the following factors except
    Atsakymas
    (D)
    consumers buying less products
  • 16
    Which of the following constitutes subsidy in agricultural enterprise?
    Atsakymas
    (A)
    supply of fertilizers to farmers at reduced price
  • 17
    Records of money transactions in a farming business are termed
    Atsakymas
    (B)
    farm accounts
  • 18
    An advantage of extensive system of rearing goats is
    Atsakymas
    (A)
    low labour requirement
  • 19
    The main processes involved in the marketing of cotton include the following except
    Atsakymas
    (A)
    wedding
  • 20
    Which of the following agricultural extensions aims at reaching a large number of farmers at the same time?
    Atsakymas
    (A)
    mass method
  • 21
    Which of the following is not an example of edaphic factors?
    Atsakymas
    (D)
    storm
  • 22
    The practice of bee farming is called
    Atsakymas
    (A)
    Apiculture
  • 23
    The study of insect pests of crops is called
    Atsakymas
    (A)
    entomology
  • 24
    Which of the following is not a characteristic of metamorphic rock?
    Atsakymas
    (C)
    they may contain fossils
  • 25
    What is the full meaning of IITA?
    Atsakymas
    (A)
    International Institute of Tropical Agriculture
  • 26
    Rocks formed by the cooling and solidification of molten rocks called magma ejected from beneath the earth's crust is
    Atsakymas
    (A)
    Igneous rock
  • 27
    Which of the following is a friend of farmer
    Atsakymas
    (A)
    earthworm
  • 28
    The source of food for fishes in the river is called
    Atsakymas
    (B)
    planktons
  • 29
    A farmer bought a farm implement for ₦12,500 in 2007. At the end of the fourth year, he sold it for ₦4,300. The annual depreciation of the implement is
    Atsakymas
    (C)
    ₦2,050
  • 30
    The average weather condition of a place, measured over a long period of time is called
    Atsakymas
    (A)
    climate
  • 31
    Which of the following equipment is a farm implement?
    Atsakymas
    (D)
    mistblower
  • 32
    A periodic maintenance activity carried out using a farm tractor is
    Atsakymas
    (C)
    cleaning after use
  • 33
    Which of the following sources of farm power is most versatile in West Africa?
    Atsakymas
    (B)
    animal
  • 34
    Farm surveying equipment include the following except
    Atsakymas
    (C)
    Spade
  • 35
    A piece of land is said to be on lease to a farmer when the land is
    Atsakymas
    (D)
    given for a specific period on rental basis
  • 36
    The problems associated with land tenure through inheritance include the following except
    Atsakymas
    (C)
    right of individuals to free use and control of inherited land
  • 37
    The alternate heating and cooling of rocks result in
    Atsakymas
    (D)
    fragmentation
  • 38
    Which of the following factors influence agricultural production is biotic factor?
    Atsakymas
    (A)
    parasite
  • 39
    The system in which a farmer uses a piece of land for a period and abandons it for another land is called
    Atsakymas
    (C)
    shifting cultivation
  • 40
    What is the percentage water content of soil sample which weighed 180g when fresh and 120g when oven-dried?
    Atsakymas
    (C)
    33.33%
  • 41
    The main objectives of agriculture is
    Atsakymas
    (C)
    food production
  • 42
    Food shortage can be minimized by
    Atsakymas
    (A)
    efficient pest control services
  • 43
    Subsistence agriculture is characterized by
    Atsakymas
    (C)
    small farm holdings
  • 44
    Output is higher in commercial agriculture because of the following reasons except
    Atsakymas
    (C)
    employment of large labour force
  • 45
    The most common factor affecting land use is
    Atsakymas
    (A)
    population pressure
  • 46
    Financial assistance from government to the farmers is usually in the following forms except
    Atsakymas
    (B)
    tax
  • 47
    Which of the following groups of animals is usually kept in game reserves?
    Atsakymas
    (D)
    lions, elephants and donkeys
  • 48
    The following processes in crops are sensitive to daylength except
    Atsakymas
    (D)
    branching
  • 49
    Rain water is made available to crops through
    Atsakymas
    (D)
    root absorbtion
  • 50
    Which of the following rocks is formed from shale?
    Atsakymas
    (B)
    slate
  • 51
    The horizon of a soil profile which encourages the greatest level of microbial activity is
    Atsakymas
    (A)
    A - horizon
  • 52
    The easiest method of determining soil texture in the field is by
    Atsakymas
    (D)
    feeling
  • 53
    The type of soil with a particle size of 0.02 to 0.002mm is
    Atsakymas
    (B)
    slit
  • 54
    If urea fertilizer contains 46% nitrogen, calculate the amount of nitrogen in 25kg bag of fertilizer?
    Atsakymas
    (A)
    11.5kg
  • 55
    Fertile soil is one which
    Atsakymas
    (D)
    contain all essential plant nutrients in suitable proportion
  • 56
    The effects of practicing crop rotation include the following except
    Atsakymas
    (C)
    adding humus to the soil
  • 57
    The method of irrigation suitable for use on a steep slope is
    Atsakymas
    (D)
    shadoof
  • 58
    The main source of power for subsistence agriculture is
    Atsakymas
    (D)
    man
  • 59
    The most suitable source of power for stationary equipment on the farm is
    Atsakymas
    (B)
    electricity
  • 60
    An important farm machine used for coupling many implements is
    Atsakymas
    (C)
    tractor
  • 61
    Which of the following is the correct order for land preparation?
    Atsakymas
    (A)
    land clearing → ploughing → harrowing → ridging
  • 62
    Which of the following surveying equipment is used for measuring angles during farm surveying?
    Atsakymas
    (A)
    Theodolite
  • 63
    Which of the following farm practices is not mechanized?
    Atsakymas
    (D)
    transplanting
  • 64
    The main aim of mechanized agriculture is
    Atsakymas
    (C)
    having a large land area for cultivation
  • 65
    The following are necessary operations in maize cultivation except?
    Atsakymas
    (C)
    nursery practices
  • 66
    Ginning is a method of processing
    Atsakymas
    (B)
    cotton
  • 67
    Ginger is propagated by
    Atsakymas
    (B)
    rhizomes
  • 68
    Which of the following is not correct about Stylosanthers gracilis?
    Atsakymas
    (A)
    It is an animal legume
  • 69
    Which of the following is not a problem of forest management?
    Atsakymas
    (C)
    planting different varieties of timber
  • 70
    The tree species commonly planted for pulp wood is
    Atsakymas
    (A)
    Gmelina
  • 71
    Root-knot disease of tomato is caused by
    Atsakymas
    (B)
    nematode
  • 72
    Callosobruchus maculates is a common pest of
    Atsakymas
    (B)
    cowpea
  • 73
    Gummosis disease of citrus is caused by
    Atsakymas
    (B)
    fungi
  • 74
    Which of the weeds is dispersed by wind?
    Atsakymas
    (D)
    Tridax (Tridax procumbeus)
  • 75
    The characteristic symptoms of mosaic disease of crops is usually observed on
    Atsakymas
    (B)
    leaves