JAMB and WAEC Agricultural Science questions

597 questions with answers and explanations. Tap an option to check yourself.

1. Question 321· Forestry· JAMB

   Cutting only selected mature trees while younger ones are left to grow is

   • Ataungya
   • Bclear felling
   • Cafforestation
   • Dselective exploitation

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   Answer: D. selective exploitation

   Explanation and discussion

2. Question 322· Forestry· WAEC

   Planting trees on land that has never been forest is

   • Aafforestation
   • Breforestation
   • Cdeforestation
   • Dagroforestry

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   Answer: A. afforestation

   Explanation and discussion

3. Question 323· Forestry· JAMB

   Gmelina and teak are planted widely in Nigeria for

   • Afood
   • Btimber and poles
   • Coil
   • Dlatex

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   Answer: B. timber and poles

   Explanation and discussion

4. Question 324· Forestry· WAEC

   Which of these is an exotic tree species widely planted in Nigeria?

   • Ateak
   • Biroko
   • Cobeche
   • Dmahogany

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   Answer: A. teak

   Explanation and discussion

5. Question 325· Forestry· JAMB

   The taungya system involves

   • Acutting all the trees in an area
   • Bplanting trees on bare land only
   • Cgrowing food crops between young forest trees
   • Dgrazing animals in forests

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   Answer: C. growing food crops between young forest trees

   Explanation and discussion

6. Question 326· Forestry· JAMB

   Which of these is a non-timber forest product?

   • Ateak poles
   • Biroko planks
   • Choney
   • Dmahogany logs

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   Answer: C. honey

   Explanation and discussion

7. Question 327· Forestry· JAMB

   The planting of trees on land that has never had forest is

   • Areforestation
   • Bdeforestation
   • Cafforestation
   • Dagroforestry

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   Answer: C. afforestation

   Explanation and discussion

8. Question 328· Forestry· JAMB

   Forests can be regenerated by

   • Aburning the forest
   • Bplanting seedlings after felling
   • Covergrazing
   • Dclearing land for crops

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   Answer: B. planting seedlings after felling

   Explanation and discussion

9. Question 329· Forestry· WAEC

   Deforestation can lead to

   • Asoil erosion and desertification
   • Bmore rainfall everywhere
   • Chigher soil fertility
   • Dmore wildlife

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   Answer: A. soil erosion and desertification

   Explanation and discussion

10. Question 330· Forestry· JAMB

    Gmelina is widely planted in Nigeria for

    • Apulpwood and timber
    • Bfood
    • Crubber
    • Dfibre for textiles

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    Answer: A. pulpwood and timber

    Explanation and discussion

11. Question 331· Forestry· JAMB

    Shelterbelts are rows of trees planted to

    • Areduce wind speed and protect crops
    • Bprovide latex
    • Cattract locusts
    • Ddrain swamps

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    Answer: A. reduce wind speed and protect crops

    Explanation and discussion

12. Question 332· Forestry· WAEC

    Afforestation means

    • Acutting down forests
    • Bplanting trees where there were none before
    • Cburning bush
    • Dgrazing animals

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    Answer: B. planting trees where there were none before

    Explanation and discussion

13. Question 333· Husbandry of field crops· JAMB

    Groundnut is harvested when

    • Apods are still white and soft
    • Bflowers first open
    • Cseedlings emerge
    • Dleaves turn yellow and pods are mature

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    Answer: D. leaves turn yellow and pods are mature

    Explanation and discussion

14. Question 334· Husbandry of field crops· JAMB

    Cocoa pods are ready for harvest when

    • Athey change colour from green to yellow or red
    • Bthey fall to the ground
    • Cflowers appear
    • Dleaves are shed

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    Answer: A. they change colour from green to yellow or red

    Explanation and discussion

15. Question 335· Husbandry of field crops· WAEC

    Supplying in crop production means

    • Athinning
    • Breplacing seeds or seedlings that failed to grow
    • Charvesting
    • Dweeding

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    Answer: B. replacing seeds or seedlings that failed to grow

    Explanation and discussion

16. Question 336· Husbandry of field crops· JAMB

    Planting two or more crops on the same piece of land at the same time is

    • Amonocropping
    • Bmixed cropping
    • Ccrop rotation
    • Dshifting cultivation

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    Answer: B. mixed cropping

    Explanation and discussion

17. Question 337· Husbandry of field crops· WAEC

    Yam is usually staked to

    • Aexpose the leaves to sunlight
    • Bprevent rooting
    • Creduce tuber size
    • Dattract pests

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    Answer: A. expose the leaves to sunlight

    Explanation and discussion

18. Question 338· Husbandry of field crops· JAMB

    Planting crops too close together leads to

    • Acompetition and lower yield per plant
    • Bbigger fruits
    • Cfewer pests
    • Dfaster drying

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    Answer: A. competition and lower yield per plant

    Explanation and discussion

19. Question 339· Husbandry of field crops· JAMB

    Yam vines are staked in order to

    • Areduce yield
    • Bexpose the leaves to sunlight for better yield
    • Cprotect against floods
    • Dattract pests

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    Answer: B. expose the leaves to sunlight for better yield

    Explanation and discussion

20. Question 340· Husbandry of field crops· WAEC

    A commonly recommended spacing for maize is about

    • A10 cm × 10 cm
    • B2 m × 2 m
    • C75 cm × 25 cm
    • D5 m × 5 m

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    Answer: C. 75 cm × 25 cm

    Explanation and discussion