WAEC Agricultural Science 2006 past questions

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

Ten questions from the 2006 WAEC Agricultural Science paper, with answers and explanations. We hold 55 questions from this paper, and the Skolra app has all of them.

WAEC Agricultural Science 2006 questions and answers

1. 1.Nagana in cattle is otherwise known as
   1. A
      Anthrax
   2. B
      Foot-and-mouth disease
   3. C
      Trypanosomiasis
      Correct
   4. D
      Rinderpest
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   Answer: C

   Nagana is the common name given to the cattle disease caused by Trypanosoma parasites, which are transmitted from one animal to another by the bite of the tsetse fly (Glossina species). Because the causative organism is the trypanosome, the disease is otherwise known as trypanosomiasis.

2. 2.Which of the following statement best describes subsistence agriculture?
   1. A
      A system of farming practised mainly on large plantations to supply raw materials to industries
   2. B
      A system of farming that uses sophisticated machinery to produce crops mainly for export
   3. C
      A system of farming in which crops and livestock are produced mainly to feed the farmer's family, with little or no surplus for sale
      Correct
   4. D
      A system of farming in which production is carried out solely for sale in the market in order to make profit
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   Answer: C

   Subsistence agriculture is farming done mainly to feed the farmer and his family, not to sell. The correct description is: a system of farming in which crops and livestock are produced mainly to feed the farmer's family, with little or no surplus for sale. It is usually practised on a small scale, with simple tools and little capital.

3. 3.The problem of land available for agriculture can be solved by
   1. A
      increasing the length of bush fallow
   2. B
      rotating crops on the same plot
   3. C
      practising shifting cultivation
   4. D
      reforming the land tenure system
      Correct
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   Answer: D

   In Nigeria, the shortage of land available for agriculture is mainly caused by the traditional land tenure system — communal and family ownership, and inheritance practices that split land among many heirs. This leads to farmers holding small, scattered plots that are too tiny and too far apart for efficient or mechanized farming, even where large areas of land exist in the community as a whole.

4. 4.The replacement of traditional farming methods with modern methods is a step in agricultural
   1. A
      Agricultural extension
   2. B
      Agricultural modernization
      Correct
   3. C
      Agricultural mechanization
   4. D
      Agricultural development
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   Answer: B

   Agricultural modernization is exactly this: moving away from old, traditional farming practices (hoe and cutlass, bush fallowing, local seeds, guesswork timing) and adopting modern, science-based methods (improved seeds, fertilizers, machinery, better storage, extension advice). When a stem talks about traditional methods being replaced by modern methods, it is describing modernization directly.

5. 5.Agricultural information flows from
   1. A
      the extension agent to the research institute to the farmer
   2. B
      the research institute to the extension agent to the farmer
      Correct
   3. C
      the farmer to the extension agent to the research institute
   4. D
      the research institute directly to the farmer
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   Answer: B

   In the agricultural extension system used in Nigeria, new farming information and technology are generated at the research institute (such as IAR or NAERLS), handed to the extension agent (the ADP field worker), who then takes it to the farmer. The extension agent is the vital link, because the farmer has no direct access to research findings and the researcher does not deal with farmers one-on-one.

6. 6.A fertilizer bag had the following inscription 27:10:10. This means that it contained
   1. A
      27% phosphorus, 10% potassium and 10% nitrogen by weight
   2. B
      27% potassium, 10% nitrogen and 10% phosphorus by weight
   3. C
      27% nitrogen, 10% phosphorus and 10% potassium by weight
      Correct
   4. D
      27 kilograms of nitrogen, 10 kilograms of phosphorus and 10 kilograms of potassium
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   Answer: C

   Fertilizer grades are always written and read in the fixed order N : P : K — Nitrogen, Phosphorus and Potassium — and each number is the percentage by weight of that nutrient in the bag, not a weight in kilograms.

   So an inscription of 27:10:10 means the fertilizer contains 27% nitrogen, 10% phosphorus and 10% potassium by weight, with the rest of the bag made up of filler material.

7. 7.The main aim of wildlife management is to
   1. A
      conserve wildlife resources and ensure their sustainable use for the benefit of man
      Correct
   2. B
      domesticate all wild animals for commercial livestock farming
   3. C
      eliminate predatory and dangerous animals from the wild
   4. D
      clear forest and game reserves to create more farmland
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   Answer: A

   Wildlife management is the branch of agricultural science concerned with the scientific control, protection and sustainable use of wild animals (game) and their habitats.

8. 8.Which of the following sequence of pre-planting operation is correct?
   1. A
      Ploughing, clearing, harrowing, ridging
   2. B
      Clearing, harrowing, ploughing, ridging
   3. C
      Clearing, ploughing, ridging, harrowing
   4. D
      Clearing, ploughing, harrowing, ridging
      Correct
   Show answerHide answer

   Answer: D

   Correct sequence: Clearing → Ploughing → Harrowing → Ridging.

   Land preparation for planting follows a logical order because each operation depends on the result of the one before it:

   Clearing comes first — the bush, weeds and trash on the land must be removed before any tillage tool can work the soil.

   So the only sequence that respects what each operation needs from the one before it is clearing, ploughing, harrowing, then ridging.

9. 9.Which of the following structures is not a part of the digestive tract of pigs?
   1. A
      Rumen
      Correct
   2. B
      Caecum
   3. C
      Duodenum
   4. D
      Oesophagus
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   Answer: A

   The pig is a monogastric (non-ruminant) animal, meaning it has a simple, single-chambered stomach. Its digestive tract runs: mouth → oesophagus → simple stomach → small intestine (including the duodenum) → large intestine (including the caecum) → rectum → anus.

10. 10.A plant not normally used as green manure is
    1. A
       Centrosema
    2. B
       Mucuna
    3. C
       Guinea grass
       Correct
    4. D
       Calopogonium
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    Answer: C

    Green manure crops are fast-growing leguminous plants that are grown and then ploughed back into the soil while still green, to rot down and add nitrogen and organic matter to the soil. For a plant to be useful as green manure, it should be a legume capable of fixing atmospheric nitrogen through root nodules, and it should produce a lot of soft, easily decomposable leafy material.

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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Practise all 55 questions we hold from the 2006 paper, on a timed CBT screen

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