WAEC Agricultural Science questions

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

1. Question 101· Crop pests and diseases· WAEC

   The stem borer damages maize by

   • Aspreading viruses only
   • Bsucking sap from leaves only
   • Ceating the roots only
   • Dtunnelling inside the stem

   Show answer

   Explanation and discussion

2. Question 102· Crop pests and diseases· WAEC

   Damping-off disease of seedlings is caused by

   • Aa virus
   • Ba fungus
   • Can insect
   • Da bird

   Show answer

   Explanation and discussion

3. Question 103· Crop pests and diseases· WAEC

   Using resistant varieties is a method of

   • Aharvesting
   • Bland clearing
   • Cdisease control
   • Dirrigation

   Show answer

   Explanation and discussion

4. Question 104· Crop pests and diseases· WAEC

   Weevils are major pests of

   • Afish ponds
   • Bgrowing cassava leaves
   • Cstored grains
   • Drubber trees

   Show answer

   Explanation and discussion

5. Question 105· Crop pests and diseases· WAEC

   Cassava mosaic disease is spread mainly by

   • Aweevils
   • Baphids
   • Clocusts
   • Dwhiteflies

   Show answer

   Explanation and discussion

6. Question 106· Crop pests and diseases· WAEC

   Crop rotation helps to control soil-borne pests because

   • Athe pests lose their host crop
   • Bit adds pesticides
   • Cit waters the soil
   • Dit kills all insects

   Show answer

   Explanation and discussion

7. Question 107· Crop pests and diseases· WAEC

   Stem borers damage maize mainly by

   • Atunnelling inside the stems
   • Bsucking sap from leaves only
   • Ceating the roots
   • Dspreading viruses

   Show answer

   Explanation and discussion

8. Question 108· Crop pests and diseases· WAEC

   Insects with piercing and sucking mouthparts include

   • Abeetles
   • Bgrasshoppers
   • Clocusts
   • Daphids

   Show answer

   Explanation and discussion

9. Question 109· Crop pests and diseases· WAEC

   Rosette disease of groundnut is spread by

   • Aaphids
   • Bweevils
   • Clocusts
   • Dbeetles

   Show answer

   Explanation and discussion

10. Question 110· Crop pests and diseases· WAEC

    The variegated grasshopper damages crops by

    • Aboring stems
    • Bsucking sap
    • Ceating the leaves
    • Drotting roots

    Show answer

    Explanation and discussion

11. Question 111· Farm tools and mechanisation· WAEC

    A disadvantage of using tractors on wet clay soils is that they

    • Aimprove drainage
    • Bcompact the soil
    • Cadd nutrients
    • Dcontrol weeds

    Show answer

    Explanation and discussion

12. Question 112· Farm tools and mechanisation· WAEC

    Which tractor-drawn implement breaks up clods after ploughing?

    • Aridger
    • Bplough
    • Charrow
    • Dplanter

    Show answer

    Explanation and discussion

13. Question 113· Farm tools and mechanisation· WAEC

    A cutlass is mainly used for

    • Aspraying chemicals
    • Bmeasuring land
    • Cclearing bush and weeds
    • Dmilking cows

    Show answer

    Explanation and discussion

14. Question 114· Farm tools and mechanisation· WAEC

    A limitation of farm mechanisation in Nigeria is

    • Atrained operators everywhere
    • Blarge areas of farmland
    • Ccheap machines
    • Dsmall, scattered farm holdings

    Show answer

    Explanation and discussion

15. Question 115· Farm tools and mechanisation· WAEC

    A prismatic compass is used in farm surveying to measure

    • Asoil pH
    • Bheights
    • Cbearings
    • Drainfall

    Show answer

    Explanation and discussion

16. Question 116· Farm tools and mechanisation· WAEC

    A ridger is used on the farm to

    • Amake ridges for planting
    • Bharvest grain
    • Cspray chemicals
    • Dpump water

    Show answer

    Explanation and discussion

17. Question 117· Farm tools and mechanisation· WAEC

    A limitation of mechanisation in Nigeria is

    • Atoo much skilled labour
    • Bsmall and scattered farm holdings
    • Cflat land everywhere
    • Dcheap spare parts

    Show answer

    Explanation and discussion

18. Question 118· Farm tools and mechanisation· WAEC

    A cutlass is used mainly for

    • Aspraying chemicals
    • Bploughing
    • Cclearing bush
    • Dmeasuring land

    Show answer

    Explanation and discussion

19. Question 119· Farm tools and mechanisation· WAEC

    A machine that harvests, threshes and cleans grain in one operation is a

    • Acultivator
    • Bridger
    • Cplanter
    • Dcombine harvester

    Show answer

    Explanation and discussion

20. Question 120· Farm tools and mechanisation· WAEC

    A tractor-drawn implement used for primary tillage is the

    • Acombine harvester
    • Bsprayer
    • Cplough
    • Dsheller

    Show answer

    Explanation and discussion