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Agricultural Science 2011 WAEC Past Questions

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26
A regulatory control of diseases in crop production is
  • A. rouging
  • B. quarantine
  • C. crop rotation
  • D. soil tillage
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27
Yellow colouration of the lower leave of a growing maize plant may be due to deficiency in
  • A. potassium
  • B. phosphorus
  • C. zinc
  • D. nitrogen
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28
Which of the following insects transmits swollen shoot disease of cocoa?
  • A. stem borer
  • B. mealybug
  • C. whitefly
  • D. scale insect
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29
The main objectives of establishing forest in the arid regions is to
  • A. check desert enroachment
  • B. provide firewood for cooking
  • C. provide bush meat
  • D. improve the beauty of the environment
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30
The forest management system which involves the planting of both food crops and forest trees on the same piece of land at the same time is known as
  • A. selective exploitation
  • B. taungya
  • C. regeneration
  • D. afforestation
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