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Agricultural Science 2004 WAEC Past Questions

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11
A disadvantage of using organic manure on the soil is that
  • A. it decreases the potassuim content of the soil
  • B. diseases spread fast
  • C. it increases the humus content of the soil
  • D. it reduces the rate of soil water evaporation
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12
Leguminous cover crops do not
  • A. bind the soil particles together through their roots
  • B. increaes the nitrogen content of soils
  • C. aid in improving the soil organic matter content
  • D. reduce the soil microbial population
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13
In the nitrogen cycle, nitrite is oxidized to nitrate by
  • A. nitrobacter
  • B. nitrosomonas
  • C. azotobacter
  • D. rhizobium
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14
Which of the following will not lead to loss of nitrogen compounds from the soil?
  • A. crop removal
  • B. burning
  • C. lodging
  • D. leaching
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15
Farm drainage does not lead to
  • A. improvement in soil structure
  • B. improvement of oil temperature
  • C. increased soil aeration
  • D. reduction of soil alkalinity
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