WAEC Agricultural Science 2022 past questions

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

Ten questions from the 2022 WAEC Agricultural Science paper, with answers and explanations. We hold 34 questions from this paper, and the Skolra app has all of them.

WAEC Agricultural Science 2022 questions and answers

1. 1.Salt licks are provided for grazing animals to
   1. A
      prevent the animals from contracting internal parasites
   2. B
      discourage the animals from eating soil and refuse
   3. C
      stimulate the animals to produce more saliva for digestion
   4. D
      supply the mineral requirements of the animals
      Correct
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   Answer: D

   Salt licks are blocks or lumps made mainly of sodium chloride together with trace minerals such as calcium, phosphorus, cobalt, iodine and copper. They are placed in grazing paddocks because natural pasture alone often cannot supply all the minerals grazing animals need for healthy bone growth, milk production, reproduction and general metabolism.

2. 2.A difference between physical and chemical weathering is that
   1. A
      Physical weathering is caused by the action of acids and water, while chemical weathering is caused by frost action and temperature changes
   2. B
      Physical weathering changes the chemical composition of rocks, while chemical weathering only breaks the rocks into smaller fragments
   3. C
      Physical weathering always takes place faster than chemical weathering, regardless of the climate
   4. D
      Physical weathering breaks rocks into smaller fragments without changing their chemical composition, while chemical weathering alters the chemical composition of the rocks
      Correct
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   Answer: D

   Physical (mechanical) weathering is the breakdown of rocks into smaller and smaller pieces by forces such as frost action, temperature changes (expansion and contraction) and abrasion. All through this process, the rock fragments produced still have the same chemical make-up as the parent rock — only the size and shape change.

3. 3.Capping is a cultural practice carried out in the cultivation of
   1. A
      Cocoyam
   2. B
      Cassava
   3. C
      Sweet potato
   4. D
      Yam
      Correct
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   Answer: D

   Capping is a cultural practice tied specifically to yam cultivation. After yam setts (cut tubers) are planted on mounds or ridges — especially when planting is done early, before the rains fully start — the top of the mound is covered with dry grass, leaves, or similar mulch material. This "cap" shields the buried sett from excessive heat and sun-scorch and reduces desiccation (moisture loss), keeping it in good condition until it sprouts and the rains set in.

   So of the four, only yam cultivation involves this specific "capping" (mound-covering) step, making it the correct answer.

4. 4.Swampy lands are most suitable for growing
   1. A
      Groundnut
   2. B
      Rice
      Correct
   3. C
      Cotton
   4. D
      Yam
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   Answer: B

   Rice is the crop most suited to swampy land. Swamps are waterlogged, poorly drained areas, and rice is one of the few staple crops that actually grows well with its roots standing in water, which is why swamp/fadama rice farming is common in Nigeria.

5. 5.To reduce rural-urban migration, the government should
   1. A
      Increase the price of imported goods to protect local industries
   2. B
      Provide employment opportunities only in urban centres
   3. C
      Reduce the number of secondary schools in rural communities
   4. D
      Establish industries and provide social amenities in rural areas
      Correct
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   Answer: D

   People leave villages for cities mainly because the cities offer things the village lacks: jobs, electricity, good roads, pipe-borne water, hospitals and schools. To stop that pull, the government must bring those same things to the rural area instead of only improving the city.

6. 6.The correct order of arrangement of ration for piglets from day old is
   1. A
      Finisher's ration, grower's ration, weaner's ration, creep ration
   2. B
      Creep ration, grower's ration, weaner's ration, finisher's ration
   3. C
      Creep ration, weaner's ration, grower's ration, finisher's ration
      Correct
   4. D
      Weaner's ration, creep ration, grower's ration, finisher's ration
   Show answerHide answer

   Answer: C

   In pig husbandry, a piglet is moved through a planned sequence of rations as it grows, each formulated to match its age and body weight.

   Creep ration comes first. It is a highly palatable, high-protein starter feed introduced from about the first one to three weeks of life, while the piglet is still suckling the sow, so that it learns to eat solid feed before weaning.

7. 7.Monocotyledonous crops include
   1. A
      Groundnut, millet and guinea corn
   2. B
      Rice, maize and sugarcane
      Correct
   3. C
      Maize, cowpea and rice
   4. D
      Cassava, yam and maize
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   Answer: B

   Rice, maize and sugarcane are all monocotyledonous crops. Monocots germinate with a single seed-leaf (cotyledon), have leaves with parallel veins, fibrous (adventitious) root systems, and scattered vascular bundles in the stem. Besides rice, maize and sugarcane, other common monocot crops are millet, guinea corn (sorghum), wheat, yam, cocoyam, banana/plantain, onion and other grasses.

   So the only set made up entirely of monocotyledonous crops is rice, maize and sugarcane.

8. 8.The practice of placing the correct number of seeds in the soil with definite intra-row and inter-row spacing is called
   1. A
      Broadcasting
   2. B
      Transplanting
   3. C
      Dibbling
      Correct
   4. D
      Drilling
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   Answer: C

   Dibbling is correct. In dibbling, holes are made in the soil at a fixed distance apart both along the row (intra-row spacing) and between the rows (inter-row spacing) using a dibber, stick or hoe handle, and a definite, correct number of seeds (usually 2–3) is dropped into each hole before covering. This is exactly the practice the question describes, and it is the standard method used for widely-spaced crops such as maize, cowpea and yam.

9. 9.Which of the following farm animals will browse more on plants in a pasture?
   1. A
      Goat
      Correct
   2. B
      Cattle
   3. C
      Sheep
   4. D
      Horse
   Show answerHide answer

   Answer: A

   The goat is correct. In animal husbandry, farm animals are grouped by their feeding habit on pasture into grazers and browsers. A grazer feeds mainly by cropping grasses and low herbage close to the ground, while a browser feeds on the leaves, twigs, shoots and shrubs of woody plants and tall vegetation, often standing on its hind legs to reach them.

10. 10.Which of the following groups of crops will thrive in areas with high rainfall?
    1. A
       Millet, sorghum and cowpea
    2. B
       Maize, guinea corn and Bambara nut
    3. C
       Cotton, groundnut and sesame
    4. D
       Oil palm, rubber and cocoa
       Correct
    Show answerHide answer

    Answer: D

    Oil palm, rubber and cocoa is the correct group. These are the classic tree/perennial crops of Nigeria's rainforest belt (South-South, South-West and South-East), where annual rainfall is high (often above 1500-2000mm) and well distributed through most of the year. They need the constant moisture and humidity of this zone to thrive.

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 34 questions we hold from the 2022 paper, on a timed CBT screen

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