the concentration of macroelements per gram of dry matter in plants is at least
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Macronutrients (Macroelements or major elements) : Which are required by plants in larger amounts (Generally present in the plant tissues in concentrations of 1 to 10 mg per gram of dry matter).
Elements: % of dry weight
Nitrogen: 1.5
Potassium: 1.0
Oxygen: 45
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