Alaska's land-grant extension doesn't use a one-size-fits-all number — it uses a published method. UAF Cooperative Extension — pH simple-rule (tons CaCO3/ac = 1.5 × ΔpH). Enter your soil-test values in the free calculator and Zone Forge returns tons of CaCO₃-equivalent per acre, ECCE-adjusted, with the citation.
Published source: Alaska — UAF Cooperative Extension Service
It depends on your soil's buffer/acidity reading and your target pH — Alaska publishes a method, not a single number. UAF Cooperative Extension — pH simple-rule (tons CaCO3/ac = 1.5 × ΔpH). Enter your values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
UAF Cooperative Extension — pH simple-rule (tons CaCO3/ac = 1.5 × ΔpH). Source: Alaska — UAF Cooperative Extension Service.
Zone Forge computes every Alaska recommendation from that state's own published land-grant method — lime, soil-test fertilizer, and full variable-rate prescriptions. See the science →