Q. Which one of the following elements is not an essential micronutrient for plant growth?
A) Zn
B) Cu
C) Ca
D) Mn
Explanation
[Solution from source] Calcium is an essential element but is needed in large amounts, so it is a macronutrient, not a micronutrient. Zinc, copper and manganese are needed only in traces and are micronutrients. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.