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Agricultural Science 2021 WAEC Past Questions

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16

In an experiment determine the percentage of organic matter in a soil sample, the following data was collected; weight of over-dried soil before burning = 50g
weight of over-dried soil after burning = 28g. Use the information to answer this question.

Determine the percentage of organic matter in the soil 

  • A. 22%
  • B. 44%
  • C. 56%
  • D. 60%
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17

Which of the following practices will improve clay soil?

  • A. use of acid-forming fertilizers
  • B. bush burning
  • C. addition of sodium chloride
  • D. addition of organic material
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18

A farmer practices crop rotation in order to

  • A. reduce yield
  • B. improve soil texture
  • C. increase pest incidence
  • D. improve soil fertility
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19

The phosphorus cycle is described as being sedimentary because phosphorus 

  • A. is a macroelement
  • B. is an earthbound element
  • C. is solid at room temperature
  • D. occurs in the atmosphere
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20

The following factors are essential for maize production except 

  • A. high temperature
  • B. low temperature
  • C. relative humidity
  • D. adequate rainfall
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