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Q.
Which one of the following is not an essential mineral element for plants while the remaining three are?
AIPMTAIPMT 2011Mineral Nutrition
Solution:
C, H, O, N, P, K, S, Mg, Ca, Fe, B, Mn, Cu, Zn, I Mo, Cl, Ni are essential elements, which has a specific structural or physiological role and without which plant cannot complete their life cycle.