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Distinguish between macro and micro nutrients?

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Macro nutrients: 

  • Excess than 10 mmole Kg-1 in tissue concentration or 0.1 to 10 mg per gram of dry weight.
  • eg: C, H, O, N, P, K, Ca, Mg and S.

Micro nutrients:

  • Less than 10 mmole Kg- in tissue concentration or equal or less than 0.1 mg per gram of dry weight.
  • eg: Fe, Mn, Cu, Mo, Zn, B, Cl and Ni.

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