JAMB Agricultural Science questions

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

1. Question 241· Meaning and importance of agriculture· JAMB

   The Green Revolution programme in Nigeria was launched in

   • A1960
   • B1980
   • C1999
   • D2011

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2. Question 242· Meaning and importance of agriculture· JAMB

   The River Basin Development Authorities were set up mainly to

   • Abuild seaports
   • Bdevelop water resources for irrigation and farming
   • Cregulate ocean fishing
   • Dmanage forest reserves

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3. Question 243· Meaning and importance of agriculture· JAMB

   The Agricultural Credit Guarantee Scheme Fund guarantees loans to farmers by

   • Acovering part of the bank's loss if a farmer defaults
   • Bgiving free money
   • Cfixing produce prices
   • Dbuying all harvests

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4. Question 244· Meaning and importance of agriculture· JAMB

   The River Basin Development Authorities were established mainly to

   • Amanage ports
   • Bgenerate oil revenue
   • Cbuild universities
   • Ddevelop water resources for irrigation and agriculture

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5. Question 245· Meaning and importance of agriculture· JAMB

   Apiculture is the keeping of

   • Asnails
   • Bfish
   • Cbees
   • Drabbits

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6. Question 246· Meaning and importance of agriculture· JAMB

   Which of the following is a contribution of agriculture to the Nigerian economy?

   • AIncreasing food imports
   • BCausing rural-urban drift
   • CProvision of raw materials for industries
   • DReducing foreign exchange earnings

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7. Question 247· Soil fertility, manures and fertilisers· JAMB

   Liming an acidic soil helps to

   • Aadd nitrogen
   • Blower the soil pH
   • Craise the soil pH
   • Dkill soil organisms

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8. Question 248· Soil fertility, manures and fertilisers· JAMB

   Repeated use of ammonium sulphate fertiliser tends to make the soil

   • Amore alkaline
   • Bmore acidic
   • Csaline
   • Dwaterlogged

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9. Question 249· Soil fertility, manures and fertilisers· JAMB

   Bush fallowing restores soil fertility by

   • Acontinuous cropping
   • Badding chemical fertiliser
   • Cburning crop residues every year
   • Dletting natural vegetation add organic matter over time

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10. Question 250· Soil fertility, manures and fertilisers· JAMB

    A bag of NPK 15:15:15 fertiliser contains

    • A15 kg of nitrogen only
    • Bnitrogen and phosphorus only
    • C15 different nutrients
    • Dequal percentages of nitrogen, phosphorus and potassium

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11. Question 251· Soil fertility, manures and fertilisers· JAMB

    Which of the following is an organic manure?

    • AUrea
    • BSingle superphosphate
    • CFarmyard manure
    • DMuriate of potash

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12. Question 252· Soil fertility, manures and fertilisers· JAMB

    Growing legumes in a rotation improves soil fertility because legumes

    • Ahave deep roots that loosen soil
    • Badd phosphorus to the soil
    • Cprevent all weeds
    • Dfix atmospheric nitrogen through bacteria in their root nodules

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13. Question 253· Soil fertility, manures and fertilisers· JAMB

    Green manuring involves

    • Aapplying urea
    • Bspreading animal dung
    • Cploughing in a growing crop, usually a legume, to enrich the soil
    • Dburning crop residues

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14. Question 254· Soil fertility, manures and fertilisers· JAMB

    Compost is made by

    • Aallowing plant and animal wastes to decompose in a heap or pit
    • Bmixing fertilisers with sand
    • Cburning crop residues
    • Ddrying animal dung in the sun

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15. Question 255· Soil fertility, manures and fertilisers· JAMB

    Placing fertiliser in a band beside the crop row is

    • Afoliar application
    • Bbroadcasting
    • Cside placement
    • Dtop dressing by air

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16. Question 256· Soil fertility, manures and fertilisers· JAMB

    Applying too much nitrogen fertiliser to maize can cause

    • Aseed dormancy
    • Bearly maturity always
    • Cno growth
    • Dlodging and excessive leafy growth

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17. Question 257· Soil fertility, manures and fertilisers· JAMB

    The nutrient mostly responsible for vigorous leafy, green growth in crops is

    • Anitrogen
    • Bpotassium
    • Cphosphorus
    • Dcalcium

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18. Question 258· Soil fertility, manures and fertilisers· JAMB

    An NPK fertiliser labelled 20:10:10 contains

    • A20% nitrogen, 10% P₂O₅ and 10% K₂O
    • B20% potassium
    • Cequal NPK
    • Dno nitrogen

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19. Question 259· Soil fertility, manures and fertilisers· JAMB

    The conversion of ammonium compounds to nitrates by soil bacteria is

    • Anitrification
    • Bdenitrification
    • Cnitrogen fixation
    • Dammonification

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20. Question 260· Soil fertility, manures and fertilisers· JAMB

    Leguminous crops improve soil fertility by

    • Aremoving nitrogen
    • Bfixing atmospheric nitrogen through root nodule bacteria
    • Cadding potassium only
    • Draising soil temperature

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