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Agricultural Science 2009 WAEC Past Questions

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26
In crop rotation, deep-rooted crops should follow shallow-rooted crops because deep-rooted crops
  • A. are resistant to diseases
  • B. are early-maturing
  • C. feed from different soil layers
  • D. attract different kinds of pests
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27
If a crop is planted at a spacing of 100cm x 50cm. Calculate the plant population required for an hectare of farm land.
  • A. 200
  • B. 2,000
  • C. 5,000
  • D. 20,000
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28
The term hermetic storage of grains means keeping grains in
  • A. air-tight containers
  • B. jute bags
  • C. silos
  • D. rhumbus
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29
A disadvantage of vegetatively propagated crops is that they
  • A. do not mature on time
  • B. are less resistant to diseases
  • C. do not withstand harsh conditions
  • D. lodge very readily
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30
Which of the following statements about mulches is true? They
  • A. include paper and plolythene sheets
  • B. encourage weed growth
  • C. facilitates hardpan formation
  • D. decrease soil biotic population
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