JAMB - Agricultural Science (2015)

  • 1
    The process of grafting in crop production involves
    Відповідь
    (D)
    The joining of two parts from related crops.
  • 2
    If the recommended spacing for a tree crop is 2.5cm by 4.0m determine the number of seedlings required to plant a 2-hectare farmland.
    Відповідь
    (B)
    2,000
  • 3
    A regulatory control of diseases in crop production is
    Відповідь
    (B)
    quarantine
  • 4
    Which of the following statements about soil organisms is false?
    Відповідь
    (A)
    Soil pH will affect the population of soil organisms
  • 5
    The data for feed consumption and weighing gain of four farm animals labelled P, Q, R and S are shown below.
    P -50kg feed consumed and 20kg weight gained Q -90kg feed consumed and 30kg weight gained R -100kg feed consumed and 25kg weight gained S - 150kg feed consumed and 30kg weight gained.


    Which of the following must efficient feed converter?
    Відповідь
    (A)
    P
  • 6
    In preparing for parturition of a sow, warmth should be provided to
    Відповідь
    (D)
    prevent chilling of the young.
  • 7
    In which layer of the soil profile do most biological activities occur?
    Відповідь
    (D)
    A-horizon
  • 8
    Which of the following statements about agricultural development are true? It leads to

    I. increased processing of produce
    II. Increased food production.
    III. High productivity.
    IV. Increased agricultural labour force.
    Відповідь
    (A)
    I, II and III only
  • 9
    Under the communal land tenure system, farmers find it difficult to secure loans because
    Відповідь
    (C)
    land holdings cannot be used as security
  • 10
    Pineapple is widely propagated using
    Відповідь
    (B)
    suckets
  • 11
    The correct sequence for the use of coupled implements for land preparation is
    Відповідь
    (A)
    Plough, harrow and ridger
  • 12
    The correct sequence of feed utilization in farm animals is
    Відповідь
    (B)
    ingestion-digestion-assimilation-absorption
  • 13
    Which of the following statements is a disadvantage of human power? It
    Відповідь
    (D)
    has low output.
  • 14
    Which of the following factors are causes of deforestation in West Africa?

    I. Expansion of cultivated land
    II. High population growth rate
    III. Conservation of wildlife in game reserves
    IV. Urban growth
    Відповідь
    (C)
    I, II and IV only
  • 15
    Which of the following properties of soil determines its water-holding capacity?

    I. Texture
    II. pH
    III. Colour
    IV. Structure
    Відповідь
    (B)
    I and IV only
  • 16
    Which of the following diseases commonly occurs during brooding?

    I. Yolk sac infection
    II. Coccidiosis
    III. Fowl pox
    IV. Pullorum
    Відповідь
    (C)
    I, III and IV only
  • 17
    A detrimental effect of bush burning is that it
    Відповідь
    (A)
    destroys soil organic matter
  • 18
    Government plays roles in the development of agriculture through the following means except
    Відповідь
    (B)
    training of farmer's children
  • 19
    Sexual maturity in farm animals is not influenced by their
    Відповідь
    (D)
    wearing age
  • 20
    Which of the following factors does not influence the distribution of cattle in West Africa?
    Відповідь
    (B)
    Light
  • 21
    Close to the time of harvesting of cotton, sunshine is needed to ensure the production of bolls that are
    Відповідь
    (B)
    Bright
  • 22
    Agriculture contributes to the economy of West African countries through the following means except
    Відповідь
    (B)
    Supply of armament for territorial defence
  • 23
    In animal production, newly-born rabbits are called
    Відповідь
    (A)
    Bunnies
  • 24
    Which of the following crops has a fibrous root system?
    Відповідь
    (D)
    sugarcane
  • 25
    Which of the following insects transmits swollen shoot disease of cocoa?
    Відповідь
    (B)
    Mealybug
  • 26
    Soil water that is available for root absorption at field capacity is
    Відповідь
    (A)
    Capillary water
  • 27
    The weight of a sheep increased from 25kg to 45kg in two months.

    If the total consumption during the period was 60kg. Determine the feed conversion ratio
    Відповідь
    (C)
    3 : 1
  • 28
    Which of the following statements is correct about micro-nutrients? They
    Відповідь
    (B)
    are required by plants in very small quantities
  • 29
    Yellow colouration of the lower leaves of a growing maize plant may be due to deficiency in
    Відповідь
    (B)
    phosphorus
  • 30
    The following crops will enrich the soil with nitrates except
    Відповідь
    (D)
    Axonopus
  • 31
    The instrument which enables a surveyor to find the direction of a base line is
    Відповідь
    (D)
    magnetic compass
  • 32
    In crop production, ginger is propagated by
    Відповідь
    (C)
    rhizome
  • 33
    Tomatoes are staked in order to
    Відповідь
    (A)
    accelerate their growth
  • 34
    Crop rotation decreases the incidence of pests by
    Відповідь
    (A)
    breaking life cycles of pests
  • 35
    The following are advantages of sub-surface irrigation except that
    Відповідь
    (D)
    it reduces the incidence of pests
  • 36
    Which of the following groups of rocks is formed as a result of volcanic eruption?
    Відповідь
    (B)
    Basalt, granite and pumice
  • 37
    Poaching is prohibited in game reserves to
    Відповідь
    (B)
    conserve wildlife
  • 38
    If T represents the gene for tallness while t represents dwarfness

    The genotypic ratio of the second filial generation will be
    Відповідь
    (A)
    3 : 1
  • 39
    The forest management system which involves the planting of both food crops and forest trees on the same piece of land at the same time is known as
    Відповідь
    (B)
    Taungya
  • 40
    If T represents the gene for tallness while t represents dwarfness

    When a tall (TT) crop is crossed with a dwarf (tt) crop, the resultant crops will be
    Відповідь
    (B)
    100% tall
  • 41
    Corns, rhizomes and tubers are examples of
    Відповідь
    (A)
    underground stems
  • 42
    A sow that is not producing milk after farrowing should be given
    Відповідь
    (A)
    oxytocin
  • 43
    The main objective of establishing forest in the arid region is to
    Відповідь
    (A)
    check desert encroachment
  • 44
    The data for feed consumption and weighing gain of four farm animals labelled P, Q, R and S are shown below.
    P-50kg feed consumed and 20kg weight gained Q-90kg feed consumed and 30kg weight gained R-100kg feed consumed and 25kg weight gained S - 150kg feed consumed and 30kg weight gained.

    The feed conversion efficiency of the poorest weight gainer is
    Відповідь
    (A)
    0.4
  • 45
    Piglet anaemia can be controlled by using
    Відповідь
    (B)
    iron drugs