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Agricultural Science 1991 WAEC Past Questions

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6
Fertilizers that usually contain one nutrient which can be used directly by plants are commonly called
  • A. organic fertilizers
  • B. mixed fertilizers
  • C. inorganic fertilizers
  • D. compound fertilizers
  • E. straight fertilizers
View Answer & Discuss WAEC 1991
7
A soil with particles of less than 0.002mm in diameter is referred to as
  • A. clay
  • B. silt
  • C. sand
  • D. gravel
  • E. humus
View Answer & Discuss WAEC 1991
8
Which of the following factors does not bring about soil formation?
  • A. climate
  • B. time
  • C. parent material
  • D. sunshine
  • E. topography
View Answer & Discuss WAEC 1991
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9
Plant micro-nutrients include the following except
  • A. sulphur
  • B. copper
  • C. iron
  • D. zinc
  • E. chlorine
View Answer & Discuss WAEC 1991
10
Most crop plants do not survive in water-logged soils because
  • A. the dissolved nutrients are too diluted for crop plants
  • B. the plants will not photosynthesize
  • C. their leaves are turgid for respiration
  • D. their physiological processes will be increased
  • E. oxygen has been displaced to its deficiency for crops
View Answer & Discuss WAEC 1991
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