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Q.
Which of the following are macronutrients ?
Mineral Nutrition
Solution:
Macroelements (Macronutrients) are those essential elements which are present in easily detectable quantities, $1$-$10$ mg per gram of dry matter. Macroelements are usually involved in the synthesis of organic molecules and development of osmotic potential. They are nine in number — $C$, $H$, $O$, $N$, $P$, $K$, $S$, $Mg$ and $Ca$.