JAMB and WAEC Agricultural Science questions

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

1. Question 181· Crop classification and propagation· WAEC

   Which of these crops is a legume?

   • Acassava
   • Bmaize
   • Cyam
   • Dcowpea

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   Explanation and discussion

2. Question 182· Crop classification and propagation· WAEC

   Cassava is propagated mainly by

   • Agrafting
   • Bseeds
   • Csuckers
   • Dstem cuttings

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   Explanation and discussion

3. Question 183· Crop classification and propagation· WAEC

   Cocoa and oil palm are classified as

   • Acover crops
   • Bannual crops
   • Cbiennial crops
   • Dperennial crops

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   Explanation and discussion

4. Question 184· Crop classification and propagation· JAMB

   Tissue culture is useful because it

   • Aproduces many disease-free plantlets quickly
   • Bneeds no laboratory
   • Cgives variable offspring
   • Duses seeds only

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5. Question 185· Crop classification and propagation· WAEC

   Coffee and tea, like cocoa, are classified as

   • Abeverage crops
   • Bfibre crops
   • Coil crops
   • Dlatex crops

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   Explanation and discussion

6. Question 186· Crop classification and propagation· JAMB

   Which of these is a fibre crop?

   • Ajute
   • Bcocoa
   • Crice
   • Dcoffee

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   Explanation and discussion

7. Question 187· Crop classification and propagation· JAMB

   Cowpea is classified as a

   • Alegume (pulse)
   • Bcereal
   • Croot crop
   • Dbeverage crop

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   Explanation and discussion

8. Question 188· Crop classification and propagation· JAMB

   Pineapple is commonly propagated by

   • Aseeds
   • Bsuckers, slips and crowns
   • Cstem cuttings
   • Dgrafting

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   Explanation and discussion

9. Question 189· Crop classification and propagation· WAEC

   Mass selection in crop improvement involves

   • Aspraying hormones
   • Bplanting all seeds
   • Ccrossing with animals
   • Dchoosing seeds from the best plants for the next planting

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10. Question 190· Crop classification and propagation· JAMB

    Yam is classified as a

    • Acereal crop
    • Blegume
    • Cbeverage crop
    • Droot and tuber crop

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    Explanation and discussion

11. Question 191· Crop pests and diseases· JAMB

    Smut of sorghum is caused by a

    • Afungus
    • Bvirus
    • Cbacterium
    • Dinsect

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    Explanation and discussion

12. Question 192· Crop pests and diseases· JAMB

    Locusts damage crops by

    • Asucking sap
    • Beating leaves and stems
    • Cboring into roots
    • Dspreading viruses only

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    Explanation and discussion

13. Question 193· Crop pests and diseases· WAEC

    A pest is any organism that

    • Ahelps crops
    • Bdamages crops or stored produce
    • Cfixes nitrogen
    • Dpollinates flowers

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    Explanation and discussion

14. Question 194· Crop pests and diseases· WAEC

    Cassava leaves that are mottled yellow-green, twisted and stunted show signs of

    • Acassava mosaic disease
    • Bcassava bacterial blight
    • Croot rot
    • Drust

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    Explanation and discussion

15. Question 195· Crop pests and diseases· JAMB

    The swollen shoot disease of cocoa is spread by

    • Atermites
    • Baphids
    • Cweevils
    • Dmealybugs

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    Explanation and discussion

16. Question 196· Crop pests and diseases· WAEC

    Biological control of pests involves

    • Ahand-picking only
    • Bspraying chemicals
    • Cburning the farm
    • Dusing natural enemies of the pest

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17. Question 197· Crop pests and diseases· WAEC

    Cocoa pods that turn brown-black and rot during wet weather show signs of

    • Ablack pod disease
    • Bswollen shoot disease
    • Ccapsid damage
    • Dleaf rust

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    Explanation and discussion

18. Question 198· Crop pests and diseases· JAMB

    Fumigation is used mainly to control

    • Afish diseases
    • Bweeds in the field
    • Cpests of stored produce
    • Dsoil acidity

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19. Question 199· Crop pests and diseases· WAEC

    The cassava mealybug was controlled in Nigeria largely by

    • Aburning all cassava
    • Breleasing a parasitic wasp
    • Cflooding farms
    • Dusing only herbicides

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    Explanation and discussion

20. Question 200· Crop pests and diseases· JAMB

    Which of these is a cultural method of pest control?

    • ACrop rotation
    • BSpraying insecticides
    • CIntroducing natural predators
    • DFumigation

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    Explanation and discussion