Critical concentration of an element is that concentration where there is (A) Appearance of toxicity symptoms (B) Retardation of growth below it (C) Maximum growth of plants (D) Minimum growth of plants
Option B.Critical Concentration is the term which is used to define the concentration of essential elements below which the growth of plant is Retarded or Reduced. Also, if the concentration of essential elements rise above the critical concentrations. it leads to Toxicity.
