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Agricultural Science 2016 WAEC Past Questions

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16
Lost soil nutrients can be replenished by the following methods except
  • A. organic manuring
  • B. fertilizer application
  • C. continuous grazing
  • D. cover cropping
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17
In the carbon cycle, carbon dioxide in the air may be replenished by
  • A. respiration
  • B. transpiration
  • C. lighting
  • D. denitrification
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18
Irrigation can be described as the
  • A. reduction of soil water
  • B. spraying of minerals on plants
  • C. application of dissolved fertilizers to the soil
  • D. application of water to the soil
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19
Which of the following conditions is a characteristic of a poorly drained soil?
  • A. presence of a large number of termites
  • B. Presence of high amount of humus
  • C. Decrease in the activities of micro organisms
  • D. High soil fertility and productivity
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20
The process of removing excess maize seedlings from a stand is known as
  • A. pruning
  • B. supplying
  • C. thinning
  • D. wedding
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