Agricultural Science JAMB, WAEC, NECO AND NABTEB Official Past Questions

1

The use of animal traction is limited in the forest zones of West Africa because of the

  • A. Topography of the forest land
  • B. presence of tsetse flies
  • C. High amount of rainfall
  • D. culture of the people
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2

The device which helps to stabilize heat in an incubator is the

  • A. thermometer
  • B. hygrometer
  • C. barometer
  • D. thermostat
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3

Limitations of farm mechanization in West Africa do not include

  • A. land fragmentation
  • B. high capital investment
  • C. availability of spare parts
  • D. Purchase of machines
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4

Piglet anaemia can be controlled by using

  • A. sulphur drugs
  • B. iron drugs
  • C. anthelmintics
  • D. antibiotics
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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.

The feed conversion efficiency of the poorest weight gainer is

  • A. 0.4
  • B. 0.33
  • C. 0.25
  • D. 0.2
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6

The main objective of establishing forest in the arid region is to

  • A. check desert encroachment
  • B. provide firewood for cooking
  • C. provide bush-meat
  • D. improve the beauty of the environment.
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7

A sow that is not producing milk after farrowing should be given

  • A. oxytocin
  • B. antibiotic
  • C. anthelmintic drug
  • D. sulphaquinoxaline.
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8

Corns, rhizomes and tubers are examples of

  • A. underground stems
  • B. underground roots
  • C. modified leaves
  • D. aerial stems
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9

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

  • A. 100% dwarf
  • B. 100% tall
  • C. 50% tall and 50% dwarf
  • D. 75% tall and 25% dwarf.
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10

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

  • A. Selective exploitation
  • B. Taungya
  • C. Slips
  • D. cuttings
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11

If T represents the gene for tallness while t represents dwarfness

The genotypic ratio of the second filial generation will be

  • A. 3 : 1
  • B. 1 : 2 : 1
  • C. 2 : 2
  • D. 4 : 0
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12

Poaching is prohibited in game reserves to

  • A. reduce wildlife population
  • B. conserve wildlife
  • C. starve hunters
  • D. protect hunters from wild animals.
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13

Which of the following groups of rocks is formed as a result of volcanic eruption?

  • A. Limestone, basalt and shale
  • B. Basalt, granite and pumice
  • C. Sandstone, granite and quartzite
  • D. Marble, gneiss and shale.
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14

The following are advantages of sub-surface irrigation except that

  • A. it is suitable for soils with low water holding capacity
  • B. it can be used only for specific types of crops
  • C. the rate of evaporation is greatly reduced
  • D. it reduces the incidence of pests
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15

Crop rotation decreases the incidence of pests by

  • A. breaking life cycles of pests
  • B. attracting pest predators
  • C. Sterilizing the soil
  • D. maintaining soil fertility.
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16

Tomatoes are staked in order to

  • A. accelerate their growth
  • B. induce flowering
  • C. accelerate fruit ripening
  • D. prevents rotting of fruits
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17

In crop production, ginger is propagated by

  • A. seeds
  • B. bulbs
  • C. rhizome
  • D. corn
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18

The instrument which enables a surveyor to find the direction of a base line is

  • A. Abney level
  • B. ranging pole
  • C. plumb bob
  • D. magnetic compass
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19

The following crops will enrich the soil with nitrates except

  • A. Calopogonium
  • B. pueraria
  • C. centrosema
  • D. Axonopus
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20

Yellow colouration of the lower leaves of a growing maize plant may be due to deficiency in

  • A. potassium
  • B. phosphorus
  • C. zinc
  • D. nitrogen
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21

Which of the following statements is correct about micro-nutrients? They

  • A. Promote formation of only root nodules
  • B. are required by plants in very small quantities
  • C. are fixed into the soil through microbial activity
  • D. increase crop tolerance to pest attack.
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