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Agricultural Science 2002 WAEC Past Questions

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11
Which of the following describes the effects of excessive nitrogen application on the growth of maize plants?
  • A. high vegetative growth with low yield
  • B. high vegetative growth with high yield
  • C. low vegetative growth with high yield
  • D. low vegetative growth with low yield
View Answer & Discuss WAEC 2002
12
Nitrogen is taken up by plant roots in the form of
  • A. nitrate ion
  • B. nitrite ion
  • C. nitric acid
  • D. nitrogen gas
View Answer & Discuss WAEC 2002
13
In the process of recycling carbon in nature, carbondioxide is used by crops during
  • A. respiration
  • B. decomposition
  • C. photosynthesis
  • D. transpiration
View Answer & Discuss WAEC 2002
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14
Which of the following is not an effect of water-logging on crop production? it
  • A. inhibits plant development
  • B. encourages leaching
  • C. inhibits the activities of micro organisms in the soil
  • D. causes plant roots to wilt
View Answer & Discuss (1) WAEC 2002
15
When soils are poorly drained,
  • A. they dry up easily
  • B. they form hardpans
  • C. the air content of the soil is reduced
  • D. the rate of decomposition is accelerated
View Answer & Discuss WAEC 2002
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