Which one of the following is not an essential mineral element for plants

Which one of the following is not an essential mineral element for plants while the remaining three are?

(a) Iron
(b) Manganese
(c) Cadmium
(d) Phosphorus

Cadmium

Cadmium is not an essential element for plants. Phosphorus is macronutrient and iron and manganese are micronutrients for plants.

admin: