JAMB Agricultural Science questions: Husbandry of field crops

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

1. Question 1· 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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2. Question 2· 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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3. Question 3· 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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4. Question 4· 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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5. Question 5· 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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6. Question 6· Husbandry of field crops· JAMB

   Supplying, as a crop husbandry practice, means

   • Aharvesting the crop
   • Bapplying fertiliser
   • Creplacing seeds or seedlings that failed to grow
   • Dremoving weeds

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7. Question 7· Husbandry of field crops· JAMB

   Yam is staked to

   • Aimprove drainage
   • Bkeep away goats
   • Cstore the tubers
   • Dexpose leaves to sunlight

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8. Question 8· Husbandry of field crops· JAMB

   The seed rate for a crop depends mainly on

   • Asoil colour
   • Bseed size, spacing and viability
   • Crainfall alone
   • Dthe farmer's age

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9. Question 9· Husbandry of field crops· JAMB

   Thinning of seedlings is done to

   • Aadd fertiliser
   • Bincrease pests
   • Creduce competition among plants
   • Dharvest early

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10. Question 10· Husbandry of field crops· JAMB

    Hardening-off of seedlings means

    • Aadding fertiliser
    • Bwatering them heavily
    • Cgradually exposing them to field conditions before transplanting
    • Dremoving weeds

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11. Question 11· Husbandry of field crops· JAMB

    Crop rotation helps to

    • Areduce yield
    • Bincrease weed growth
    • Cexhaust the soil
    • Dcontrol pests and diseases and maintain soil fertility

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12. Question 12· Husbandry of field crops· JAMB

    Lowland rice is usually grown in

    • Awaterlogged or irrigated fields
    • Bsandy desert
    • Crocky hilltops
    • Dsalt marshes

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13. Question 13· Husbandry of field crops· JAMB

    Thinning in crop production is done to

    • Aincrease the number of plants
    • Bcontrol all pests
    • Creduce competition among seedlings
    • Dharvest the crop early

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14. Question 14· Husbandry of field crops· JAMB

    Cassava stems for planting should be cut about

    • Awithout nodes
    • B2 cm long
    • C2 m long
    • D20-25 cm long with several nodes

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15. Question 15· Husbandry of field crops· JAMB

    The main benefit of mulching a crop is that it

    • Aattracts pests
    • Bincreases soil acidity
    • Cconserves soil moisture
    • Dspeeds up erosion

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16. Question 16· Husbandry of field crops· JAMB

    Earthing up in groundnut and potato production means

    • Aremoving soil from the roots
    • Bheaping soil round the base of the plants
    • Cspraying the leaves
    • Dharvesting early

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17. Question 17· Husbandry of field crops· JAMB

    Nursery beds are usually shaded in order to

    • Akeep rats away
    • Bprotect young seedlings from strong sun and heavy rain
    • Cincrease the light reaching seedlings
    • Draise the soil temperature

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18. Question 18· Husbandry of field crops· JAMB

    Pruning of cocoa trees helps to

    • Areduce yield
    • Bincrease weeds
    • Cremove diseased branches and improve air flow
    • Dattract pests

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19. Question 19· Husbandry of field crops· JAMB

    Ridging land before planting yam mainly helps to

    • Aharden the soil
    • Bkill all pests
    • Creduce sunlight
    • Dloosen the soil for tuber expansion and improve drainage

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20. Question 20· Husbandry of field crops· JAMB

    In most parts of southern Nigeria, maize is best planted

    • Aat the beginning of the rainy season
    • Bin the middle of the dry season
    • Cduring the harmattan
    • Dat the end of the rainy season only

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