Elements present in plant tissues in concentrations greater than $......$ are called macronutrients.
- A$1 \ m\,mole \ kg^{-1}$ of dry matter
- B$5 \ m\,mole \ kg^{-1}$ of dry matter
- C$10 \ m\,mole \ kg^{-1}$ of dry matter
- D$20 \ m\,mole \ kg^{-1}$ of dry matter
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