JAMB Agricultural Science past questions and answers

Checked by the Skolra question team · Last updated 23 October 2026

JAMB Agricultural Science: 504 past questions from 8 papers between 2015 and 2025, each with the answer and an explanation. In the UTME you answer 40 Agricultural Science questions, with Use of English and two other subjects, in 2 hours. Here are ten.

1. 1.

   The following animals are polygastric animals except

   1. A
      Sheep
   2. B
      Pig
      Correct
   3. C
      Cattle
   4. D
      Goat
   Show answerHide answer

   Answer: B

   Polygastric (ruminant) animals have a compound stomach made up of four chambers — the rumen, reticulum, omasum and abomasum. This special arrangement lets them digest tough, fibrous plant material through microbial fermentation and by chewing the cud (rumination).

   Cattle, goats and sheep are all classic examples of polygastric ruminants, so they belong together in this group.

2. 2.

   Which of the following fruit is a capsule?

   1. A
      Groundnut
   2. B
      Mango
   3. C
      Tomato
   4. D
      Cotton
      Correct
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   Answer: D

   Cotton produces a capsule, a dry dehiscent fruit that splits open at maturity to expose the seed fibres; mango is a drupe, groundnut forms a legume pod, and tomato is a berry.

3. 3.

   Fertilizers are applied to fishponds to serve as

   1. A
      Aerators to increase dissolved oxygen levels
   2. B
      Stimulants for plankton growth as natural food for fish
      Correct
   3. C
      Disinfectants to kill fish parasites
   4. D
      Direct food supplements for fish
   Show answerHide answer

   Answer: B

   Fertilizers added to fishponds supply nutrients that promote the rapid growth of phytoplankton and zooplankton, which serve as the primary natural food source for fish and thereby improve fish production.

4. 4.

   What is the main difference between organic and inorganic fertilizers?

   1. A
      Organic fertilizers are more expensive to produce, while inorganic fertilizers are always cheaper for farmers
   2. B
      Organic fertilizers are applied only to cash crops, while inorganic fertilizers are applied only to food crops
   3. C
      Organic fertilizers contain no nitrogen, while inorganic fertilizers contain only nitrogen
   4. D
      Organic fertilizers are derived from plant or animal remains, while inorganic fertilizers are manufactured from chemical or mineral substances
      Correct
   Show answerHide answer

   Answer: D

   Organic fertilizers (like farmyard manure, compost and green manure) are derived from the decomposed remains of plants and animals. They release their nutrients slowly and also improve soil structure, aeration and water-holding capacity by adding humus.

5. 5.

   Crops grown primarily for feeding animals are known as

   1. A
      Cash crops
   2. B
      Fodder crops
      Correct
   3. C
      Industrial crops
   4. D
      Food crops
   Show answerHide answer

   Answer: B

   Fodder crops are plants cultivated specifically as feed for livestock and include grasses, legumes, and other herbage grown to supply energy, protein, and roughage to farm animals.

6. 6.

   Government agricultural policies include the following except

   1. A
      A farmer's personal choice of which crop to plant
      Correct
   2. B
      Subsidy on farm inputs
   3. C
      Provision of agricultural credit facilities
   4. D
      Extension services to farmers
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   Answer: A

   Input subsidies, credit facilities and extension services are all government agricultural policies. A farmer's own decision about what to plant is a personal farm-management choice, not a government policy.

7. 7.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 crop will be
   1. A
      1 TT : 2 Tt : 1 tt
   2. B
      All Tt (heterozygous tall)
      Correct
   3. C
      1 TT : 1 tt
   4. D
      All tt (dwarf)
   Show answerHide answer

   Answer: B

   When a homozygous tall (TT) plant is crossed with a homozygous dwarf (tt) plant, all F1 offspring will be Tt (heterozygous). Since tallness is dominant, all F1 plants will be tall in phenotype but heterozygous in genotype.

8. 8.

   What is the role of agricultural extension officers in the field of agriculture?

   1. A
      To inspect and certify farm machinery imported from abroad
   2. B
      To transfer improved agricultural knowledge and skills from research to farmers
      Correct
   3. C
      To personally sell farmers' produce directly to consumers in the market
   4. D
      To enforce government taxes and levies on farm produce
   Show answerHide answer

   Answer: B

   Agricultural extension officers act as a link between research institutes and farmers. Their main role is to transfer improved agricultural knowledge, technologies and skills from research findings to farmers, and to educate, train and advise farmers on better methods of crop and livestock production, so that farmers can improve their yields and standard of living.

9. 9.

   Television, radio, posters, bulletin are ____ method of extension

   1. A
      result demonstration
   2. B
      group discussion
   3. C
      individual contact
   4. D
      mass media
      Correct
   Show answerHide answer

   Answer: D

   Television, radio, posters and bulletins are all channels that reach large numbers of people at the same time without face-to-face contact. In agricultural extension, this category of teaching method is called the mass media method.

10. 10.

    Agricultural extension programme would succeed in disseminating new ideas to farmers except if the programme

    1. A
       Involves farmers' active participation
    2. B
       Is built around the farmers' actual felt needs
    3. C
       Ignores the farmers' local conditions and needs
       Correct
    4. D
       Is delivered in the farmers' own local language
    Show answerHide answer

    Answer: C

    An extension programme succeeds when it involves farmers, speaks their language and addresses their felt needs. It fails to disseminate new ideas if it ignores farmers' local conditions and needs, since farmers then see it as irrelevant to their own situation.

The questions come from past JAMB, WAEC and NECO papers. We use software to help write the answer options and explanations, and every answer is checked twice before it goes on the site. How we check

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