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Free JAMB Past Question for agriculture

Q.1

A farmer wants to prevent the spread of parasites in his poultry farm. What method, according to the syllabus, is a key preventative measure?

A) Dipping.

B) Spraying.

C) Deworming.

D) Sanitation.


Correct Answer: option d

Further reading: Livestock health and disease prevention.

Show explanation

While dipping, spraying, and deworming are used for control, sanitation is the fundamental preventative measure against the spread of diseases and parasites. Proper sanitation breaks the life cycle of many pathogens and parasites.

Q.2

Which of the following is a common method of post-harvest processing for garri?

A) Sun-drying of whole cassava tubers.

B) Fermentation and roasting of grated cassava.

C) Boiling cassava roots to make a paste.

D) Crushing fresh cassava and extracting the starch.


Correct Answer: option b

Further reading: Post-harvest processing.

Show explanation

Garri processing is a traditional method that involves several steps, including the fermentation and roasting of grated cassava. This process removes cyanide, preserves the product, and gives it its characteristic texture and taste

Q.3

Which of the following is considered a modern aspect of agriculture?

A) Processing of agricultural goods.

B) Shifting cultivation.

C) Bush fallowing.

D) Using modern farm tools and ICT.


Correct Answer: option a

Further reading: The meaning and scope of agriculture.

Show explanation

The modern definition of agriculture extends beyond just production to include processing and marketing, reflecting a more comprehensive and value-chain-oriented approach to the sector. Shifting cultivation, bush fallowing, and simple farm tools are traditional or basic practices rather than modern conceptualizations of agriculture's scope.

Q.4

The tillage practice of deep ploughing is most likely to be used for which of the following purposes?

A) Conserving soil moisture.

B) Controlling perennial weeds.

C) Reducing labor costs.

D) Minimizing soil disturbance.


Correct Answer: option b

Further reading: Tillage practices.

Show explanation

Deep ploughing is a type of soil tillage that involves turning the soil to a considerable depth. This practice is effective for burying and killing deep-rooted perennial weeds and preparing a seedbed for certain crops, though it can also lead to soil erosion.

Q.5

Which of the following farm inputs is considered a material used for planting?

A) Herbicides.

B) Seeds.

C) Fertilizers.

D) Pesticides.


Correct Answer: option b

Further reading: Farm inputs.

Show explanation

Planting materials are a specific type of farm input. Seeds, cuttings, and suckers are all examples of planting materials, whereas herbicides, fertilizers, and pesticides are agrochemicals.

Q.6

What is a key problem associated with the marketing of agricultural products?

A) High price elasticity of demand and supply.

B) The perishability of the products.

C) Uniform quality and standardization.

D) Easy availability of credit facilities.


Correct Answer: option b

Further reading: Marketing of agricultural products.

Show explanation

A major problem in agricultural marketing is the perishability of most agricultural products. This often leads to a short shelf life, forcing farmers to sell their produce quickly, sometimes at lower prices, to avoid spoilage.

Q.7

A key problem of agricultural development in West Africa is the inadequate infrastructure. Which of the following is a potential solution?

A) Banning the use of imported goods.

B) Establishing more research institutes.

C) Providing better roads and communication systems.

D) Promoting shifting cultivation.


Correct Answer: option c

Further reading: Problems of agricultural development in West Africa.

Show explanation

Inadequate infrastructure, such as poor transport and communication systems, is a major problem in West African agriculture. A direct solution is the provision of better infrastructure, which facilitates the movement of inputs and produce, reducing post-harvest losses and improving market access.

Q.8

Which of the following is a key feature of the Land Use Act in Nigeria, as it relates to agricultural land?

A) It allows for the unrestricted sale of land by individuals.

B) It vests all land in the state governor.

C) It promotes communal land ownership.

D) It exempts agricultural land from all government control.


Correct Answer: option b

Further reading: Land tenure systems.

Show explanation

A key feature of the Land Use Act is that it vests all land in the territory of a state in the governor of that state, who holds it in trust for the people. This fundamentally changed land ownership and access for agriculture.

Q.9

The process of converting forage crops into silage primarily involves which method of preservation?

A) Sun-drying the crops.

B) Anaerobic fermentation.

C) Cooking and canning.

D) Chemical desiccation.


Correct Answer: option b

Further reading: Post-harvest operations.

Show explanation

Silage is a method of preserving pasture and forage crops for livestock feed. The process relies on anaerobic fermentation, where beneficial bacteria produce lactic acid, which lowers the pH and preserves the crop. Hay-making, on the other hand, involves sun-drying.

Q.10

The process of embryo formation and development in a plant culminates in the formation of what?

A) Flowers and leaves.

B) Roots and shoots.

C) Seeds and fruits.

D) Pollen and ovules.


Correct Answer: option c

Further reading: Plant propagation and genetics.

Show explanation

The process of embryo formation and development in plants is a crucial part of the reproductive cycle, leading directly to the formation of seeds and fruits.

Q.11

A West African government imposes a ban on the importation of foreign rice. This is an example of what type of policy?

A) An agricultural law.

B) A fiscal policy.

C) An infrastructural policy.

D) An NGO contribution.


Correct Answer: option b

Further reading: Agricultural policies and laws.

Show explanation

Government policies like import duties and bans on importation are considered fiscal policies that are used to influence agricultural production by protecting local industries and controlling market forces.

Q.12

A farmer notices a disease outbreak in his herd. He suspects the disease is caused by a protozoan. What would be an appropriate control measure?

A) Administering antibiotics.

B) Administering an antiviral vaccine.

C) Applying deworming medication.

D) Administering an antiprotozoal drug.


Correct Answer: option d

Further reading: Disease prevention and control.

Show explanation

Different types of pathogens require specific treatments. Protozoal diseases, like coccidiosis, are controlled by antiprotozoal drugs, not antibiotics (for bacteria), vaccines (for viruses), or dewormers (for parasites).

Q.13

What is the primary method of weed dispersal for weeds like Chromolaena odorata (Siam weed) which has feathery seeds?

A) Water dispersal.

B) Animal dispersal.

C) Wind dispersal.

D) Mechanical dispersal.


Correct Answer: option c

Further reading: Weed control methods.

Show explanation

Weeds with light, feathery or winged seeds, like Chromolaena odorata, are primarily dispersed by wind. This allows their seeds to travel over long distances and colonize new areas effectively.

Q.14

A farmer wants to control a pest by using a trap crop. What is the principle behind this method?

A) It uses a chemical to poison the pest.

B) It involves planting a crop that attracts pests away from the main crop.

C) It uses a physical barrier to prevent pest entry.

D) It involves introducing a natural predator of the pest.


Correct Answer: option b

Further reading: Weed control.

Show explanation

Trap cropping is a weed control method where a specific crop is planted to attract pests away from the main cash crop. This draws the pests to the trap crop, where they can be more easily controlled or eliminated.

Q.15

Which of the following terms describes the act of a female goat giving birth?

A) Calving.

B) Farrowing.

C) Kidding.

D) Lambing.


Correct Answer: option c

Further reading: Terminologies in animal production.

Show explanation

The term kidding is specifically used to describe the act of a goat giving birth. Calving is for cattle, farrowing is for pigs, and lambing is for sheep.

Q.16

A farmer is using a drag net to catch fish. What type of fishing system is this most likely associated with?

A) Extensive system (inland fishing).

B) Semi-intensive system.

C) Intensive system (fish pond).

D) Land-based system.


Correct Answer: option a

Further reading: Fish culture systems.

Show explanation

The use of drag nets is a method of harvesting fish typically associated with extensive fish culture systems, which include fishing in large bodies of water like lakes, rivers, and inland seas. This method is less common in smaller, controlled fish ponds.

Q.17

Which of the following is a primary importance of agricultural processing?

A) To increase the susceptibility of produce to pests.

B) To reduce the nutritional value of crops.

C) To increase the shelf life and value of agricultural products.

D) To make products harder to transport.


Correct Answer: option c

Further reading: Agricultural processing.

Show explanation

A key importance of agricultural processing is its ability to transform raw produce into more durable and valuable products. This process, whether traditional or modern, helps to increase the shelf life and adds value to the agricultural products.

Q.18

Which of the following is a biotic factor that affects agricultural production?

A) Rainfall.

B) Sunlight.

C) Pests.

D) Temperature.


Correct Answer: option c

Further reading: Ecological factors.

Show explanation

Biotic factors are living or once-living components of an ecosystem that affect agricultural production. Pests, diseases, and beneficial organisms are all examples of biotic factors, while rainfall, sunlight, and temperature are abiotic (non-living) factors.

Q.19

What is the primary reason for conducting a quarantine program in animal improvement?

A) To separate animals based on their breed.

B) To provide a controlled environment for inbreeding.

C) To prevent the spread of diseases from newly introduced animals.

D) To cross-breed different species.


Correct Answer: option c

Further reading: Animal improvement.

Show explanation

Quarantine is a method of animal improvement that is crucial for preventing the introduction and spread of diseases. Newly introduced animals are isolated for a period to ensure they are healthy before they are integrated into the existing herd.

Q.20

The establishment of a game reserve is primarily for what purpose?

A) To domesticate all wild animals.

B) To protect and conserve wildlife habitats and species.

C) To provide a space for hunting.

D) To convert wild animals into farm animals.


Correct Answer: option b

Further reading: Wildlife and apiculture.

Show explanation

Game reserves are established for the crucial purpose of conserving and protecting wildlife habitats and the animal species within them.

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