WAEC Agricultural Science questions

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

1. Question 181· Husbandry of field crops· WAEC

   Maize is ready for harvest as green maize about

   • A3 days after planting
   • B2 weeks after planting
   • C1 year after planting
   • D10 to 12 weeks after planting

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2. Question 182· Husbandry of field crops· WAEC

   Cocoa seedlings are usually raised in a nursery under

   • Awater
   • Bfull sun
   • Cshade
   • Ddarkness

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3. Question 183· Husbandry of field crops· WAEC

   Supplying in crop husbandry means

   • Agiving fertiliser
   • Breplacing seeds that failed to germinate
   • Cspraying chemicals
   • Dharvesting

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4. Question 184· Irrigation and drainage· WAEC

   Excessive irrigation in dry areas can cause

   • Amore humus
   • Bsalinity of the soil
   • Cless evaporation
   • Dbetter soil structure

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5. Question 185· Irrigation and drainage· WAEC

   A problem of irrigation in dry areas is

   • Atoo much humus
   • Bsalt build-up in the soil
   • Cexcess nitrogen
   • Dheavy leaching by rain

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6. Question 186· Irrigation and drainage· WAEC

   Drip (trickle) irrigation is efficient because it

   • Adelivers water directly to the roots
   • Bfloods the whole field
   • Cwastes much water
   • Dneeds no pipes

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7. Question 187· Irrigation and drainage· WAEC

   Shadoof irrigation lifts water using

   • Aa tractor
   • Ban electric pump
   • Ca windmill
   • Da pole, bucket and counterweight

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8. Question 188· Irrigation and drainage· WAEC

   A disadvantage of flood irrigation is that it

   • Awastes water and may cause erosion
   • Buses no water
   • Cis very expensive to build always
   • Dneeds computers

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9. Question 189· Irrigation and drainage· WAEC

   Waterlogging affects crops mainly by

   • Aadding nutrients
   • Breducing oxygen around the roots
   • Craising temperature
   • Dincreasing sunlight

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10. Question 190· Irrigation and drainage· WAEC

    Sprinkler irrigation applies water

    • Aby flooding the field
    • Bthrough underground pipes only
    • Cas a spray like rain
    • Din furrows

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11. Question 191· Irrigation and drainage· WAEC

    Water for irrigation can be obtained from

    • Afertilisers
    • Bsand
    • Crocks
    • Drivers, dams and boreholes

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12. Question 192· Irrigation and drainage· WAEC

    A problem of poor drainage is

    • Awaterlogging
    • Bdrought
    • Cgood aeration
    • Dfast root growth

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13. Question 193· Irrigation and drainage· WAEC

    Irrigation allows farmers to

    • Aavoid weeding
    • Bstop all planting
    • Cgrow crops in the dry season
    • Dreduce yields

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14. Question 194· Irrigation and drainage· WAEC

    Mole drains are

    • Aunlined underground channels formed in clay soil by a mole plough
    • Bopen ditches
    • Cdrip pipes
    • Ddams

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15. Question 195· Irrigation and drainage· WAEC

    Drainage is the

    • Asupply of water to crops
    • Bremoval of excess water from the soil
    • Cdigging of wells
    • Dstorage of grain

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16. Question 196· Irrigation and drainage· WAEC

    Irrigation is the

    • Aharvesting of rain
    • Bremoval of excess water
    • Cartificial supply of water to crops
    • Ddrying of crops

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17. Question 197· Irrigation and drainage· WAEC

    Irrigation is

    • Aremoval of excess water
    • Bartificial application of water to crops
    • Cflooding of towns
    • Dcollecting rainwater only

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18. Question 198· Irrigation and drainage· WAEC

    Which irrigation method wastes the least water?

    • Aflood irrigation
    • Bdrip irrigation
    • Cfurrow irrigation
    • Dbasin irrigation

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19. Question 199· Irrigation and drainage· WAEC

    Overhead sprinkler irrigation is suitable for

    • Aswamps
    • Brice paddies only
    • Cvegetables and lawns
    • Dforests

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20. Question 200· Irrigation and drainage· WAEC

    A rain gauge is used on the farm to

    • Ameasure soil pH
    • Bmeasure wind
    • Cmeasure rainfall
    • Dmeasure temperature

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    Explanation and discussion