This book is related to effect of exogenous application of gibberellic acid potassium nitrate and silicic acid under salt stress on physiological biochemical parameters and enzymatic activities of groundnut. GA3 KNO3 and silicic acid are potential biomolecules in reducing the adverse effect of salt stress in plant. GA3 KNO3 and silicic acid has been showed to be beneficial for plant growth and development.