JAMB Agricultural Science 2019 past questions

Checked by the Skolra question team · Last updated 15 October 2026

Ten questions from the 2019 JAMB Agricultural Science paper, with answers and explanations. We hold 78 questions from this paper, and the Skolra app has all of them.

JAMB Agricultural Science 2019 questions and answers

1. 1.

   Which of the following required daily checking in a tractor?

   1. A
      Battery electrolyte level
   2. B
      Engine oil level
      Correct
   3. C
      Hydraulic fluid level
   4. D
      Gear box oil level
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   Answer: B

   Engine oil level must be checked daily before operating a tractor to prevent engine damage from running with insufficient lubrication. Gear box and hydraulic fluid levels are checked on a weekly or periodic maintenance schedule.

2. 2.

   The main mode of infection of rinderpest disease in cattle is through

   1. A
      Biting insect vectors
   2. B
      Contaminated soil
   3. C
      Direct contact with infected animals
      Correct
   4. D
      Ingestion of contaminated water only
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   Answer: C

   Rinderpest spreads primarily through direct contact between infected and susceptible cattle, with the morbillivirus transmitted via saliva, nasal discharge, feces, and other secretions from infected animals. The disease can devastate entire herds when infected and healthy cattle are mixed.

3. 3.

   The process whereby rocks are broken down into small particles through both physical and chemical factors is known as

   1. A
      Erosion
   2. B
      Leaching
   3. C
      Weathering
      Correct
   4. D
      Decomposition
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   Answer: C

   Weathering is the process by which rocks are broken down into smaller particles through both physical (mechanical) forces and chemical reactions over time. Erosion involves the transport of already broken material, while decomposition refers specifically to the breakdown of organic matter.

4. 4.

   The following are importance of agriculture except

   1. A
      Provision of food for the growing population
   2. B
      Generation of employment for rural dwellers
   3. C
      Promotion of industrial strikes and labor unrest
      Correct
   4. D
      Earning of foreign exchange through export of cash crops
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   Answer: C

   Agriculture provides food, employment, raw materials for industry, and foreign exchange earnings, among other benefits. Promoting industrial strikes is not a function or recognized importance of agriculture.

5. 5.

   The wear and tear of farm structures over time is described as

   1. A
      Depreciation
      Correct
   2. B
      Obsolescence
   3. C
      Amortization
   4. D
      Devaluation
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   Answer: A

   Depreciation refers to the gradual reduction in the value of farm structures, buildings, and equipment resulting from continued use, weathering, and the passage of time. It is an important cost item in farm enterprise accounting.

6. 6.

   Which of the following cereal crops most requires nursery practices?

   1. A
      Maize
   2. B
      Sorghum
   3. C
      Millet
   4. D
      Rice
      Correct
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   Answer: D

   Rice, particularly lowland paddy rice, is routinely raised in nurseries before transplanting to the main field, a practice that improves stand establishment, facilitates weed management, and makes efficient use of land and planting material.

7. 7.

   All but one are related to surface irrigation?

   1. A
      Drip irrigation
      Correct
   2. B
      Furrow irrigation
   3. C
      Flood irrigation
   4. D
      Basin irrigation
   Show answerHide answer

   Answer: A

   Drip (trickle) irrigation delivers water directly to the plant root zone through pipes and emitters under low pressure and is classified as a micro-irrigation system, not a surface irrigation method.

8. 8.

   Which of the following is a type of land tenure system?

   1. A
      Shifting cultivation
   2. B
      Mixed farming
   3. C
      Crop rotation
   4. D
      Freehold tenure
      Correct
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   Answer: D

   Freehold tenure is a recognized type of land tenure system in which an individual holds outright ownership of a piece of land with no time limit. Other recognized land tenure types include leasehold, communal tenure, and tenancy arrangements.

9. 9.

   Legumes are different from grasses, because

   1. A
      They always have fibrous root systems
   2. B
      They are always annual plants
   3. C
      They require more water than grasses
   4. D
      They fix atmospheric nitrogen through root nodules
      Correct
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   Answer: D

   Legumes harbour symbiotic Rhizobium bacteria in specialised root nodules that fix atmospheric nitrogen into plant-available forms, an ability that grasses do not possess.

10. 10.

    The causative organism of maize rust is?

    1. A
       Ustilago maydis
    2. B
       Fusarium oxysporum
    3. C
       Helminthosporium turcicum
    4. D
       Puccinia sorghi
       Correct
    Show answerHide answer

    Answer: D

    Maize rust is caused by the fungus Puccinia sorghi, which produces reddish-brown uredial pustules on the leaves of infected maize plants, reducing photosynthetic capacity and yield.

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

Spotted a wrong answer? Tell us from the app or on the contact page and we check it.

Practise all 78 questions we hold from the 2019 paper, on a timed CBT screen

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