Question

Which one of the following is not a micronutrient for plants?

• A. Magnesium
• B. Molybdenum
• C. Boron
• D. Zinc

Answer 1

Answer: (A)

Magnesium is a macro nutrient. Micro nutrients are essential elements that are needed by plants in small amount. They include $Fe,Cu,B,Mo,Mn,Cl,$ and $Ni$. Macro nutrients, on the other hand, are those essential elements that are required by plants in larger amount. The examples include $C,H,O,N,S,P,K,Ca$ and $Mg$.