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Agricultural Science 1991 WAEC Past Questions

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1
The most important soil micro-organisms concerned with decay and nutrients-recycling are
  • A. bacteria and fungi
  • B. fungi and algea
  • C. alga and actinomyces
  • D. actinomyces and bacteria
  • E. bacteria and algea
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2
the nutrient content of soil may be influenced by the following except
  • A. harrowing
  • B. topography
  • C. cropping
  • D. fallowing
  • E. grazing
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3
What happens to the nitrogen and sulphur contents of vegetation when burning is used as a means of lans clearing? They
  • A. are released by burning and lost as gases
  • B. remain in ash as nitrates and sulphates
  • C. raise the PH of an acid soil
  • D. are released into the soil thus increasing the nutrients of the soil
  • E. activate the soil microbes afetr burning
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4
Which of the following does not occur as a result of poor drained soil?
  • A. mottling near the top
  • B. decrease in rooting depth
  • C. change in colour of the subsoil
  • D. decrease in organic matter content
  • E. increase in oxygen level of the soil
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5
The different types of soil are determined by the relative amounts of each of the following components except
  • A. rocks
  • B. air
  • C. water
  • D. minerals
  • E. organic matter
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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