6/6/2021 · If current soil pH = 5.0, target pH = 6.0, Ac = 1.2, and RC = 0, since no lime has been applied within the past year, then the recommended lime rate is: 1.2 x [(6.0 – 5.0) / (6.6 – 5.0)] – 0 = 0.76 ton/acre This value is rounded off and reported as 0.8 tons per acre.