where ICaCO3 = initial CaCO3 equivalence of the solution (mg CaCO3); V = volume of bicarbonate solution mixed with soil sample (mL); C = concentration of bicarbonate solution (mg CaCO3 mL−1).
where ICaCO3 = initial CaCO3 equivalence of the solution (mg CaCO3);V = volume of bicarbonate solution mixed with soil sample (mL);C = concentration of bicarbonate solution (mg CaCO3 mL−1).