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WAEC Agricultural Science questions: Weeds and weed control

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

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All topicsAgricultural economics and extension · 19Animal pests and diseases · 18Animal reproduction and nutrition · 18Classification and anatomy of farm animals · 18Crop classification and propagation · 18Crop pests and diseases · 19Farm tools and mechanisation · 18Fisheries and aquaculture · 18Forestry · 18Husbandry of field crops · 19Irrigation and drainage · 18Livestock management · 18Meaning and importance of agriculture · 17Soil fertility, manures and fertilisers · 19Soil formation and properties · 18Weeds and weed control · 18

  1. Question 1· Weeds and weed control· WAEC

    Water hyacinth is a weed problem mainly in

    Explanation and discussion

  2. Question 2· Weeds and weed control· WAEC

    Which is a cultural method of weed control?

    Explanation and discussion

  3. Question 3· Weeds and weed control· WAEC

    Weeds reduce crop yield mainly by

    Explanation and discussion

  4. Question 4· Weeds and weed control· WAEC

    A herbicide that kills only certain plants and leaves the crop unharmed is

    Explanation and discussion

  5. Question 5· Weeds and weed control· WAEC

    Seeds of many weeds remain viable in the soil for a long time because of

    Explanation and discussion

  6. Question 6· Weeds and weed control· WAEC

    Paraquat is a

    Explanation and discussion

  7. Question 7· Weeds and weed control· WAEC

    Striga (witchweed) harms sorghum and maize by

    Explanation and discussion

  8. Question 8· Weeds and weed control· WAEC

    A weed is best described as

    Explanation and discussion

  9. Question 9· Weeds and weed control· WAEC

    A useful feature of some weeds is that they

    Explanation and discussion

  10. Question 10· Weeds and weed control· WAEC

    Which of these is a cultural method of weed control?

    Explanation and discussion

  11. Question 11· Weeds and weed control· WAEC

    Some weeds reduce crop quality at harvest by

    Explanation and discussion

  12. Question 12· Weeds and weed control· WAEC

    Spear grass is difficult to control because it

    Explanation and discussion

  13. Question 13· Weeds and weed control· WAEC

    A herbicide that kills only certain kinds of plants is

    Explanation and discussion

  14. Question 14· Weeds and weed control· WAEC

    Weeds increase the cost of crop production because

    Explanation and discussion

  15. Question 15· Weeds and weed control· WAEC

    Guinea grass is regarded as a weed when it

    Explanation and discussion

  16. Question 16· Weeds and weed control· WAEC

    Using a cover crop such as Centrosema helps to

    Explanation and discussion

  17. Question 17· Weeds and weed control· WAEC

    Striga (witchweed) is a parasitic weed of

    Explanation and discussion

  18. Question 18· Weeds and weed control· WAEC

    Spear grass (Imperata cylindrica) is difficult to control mainly because it

    Explanation and discussion

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