Lawn lime application corrects the pH balance in soil by neutralizing its acidity and alkalinity. You can almost think of it as an antacid for your grass because you’re giving it something it needs. Fertilization of lawns causes the PH of the lawn to become acidic by applying limestone you can bring the PH level back down to a natural balance which allows grass to prosper. However, PH balance is not the only benefit that lime has on lawns.