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Q:

The deficiency of essential elements for plants can be removed by giving which of the following?

  • 1
    Nitrogen, Potash and Phosphorus
  • 2
    Copper, nitrogen and iron
  • 3
    Iron, Magnesium and Potash
  • 4
    Zinc, Boron and Copper
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Answer : 4. "Zinc, Boron and Copper"

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