Maine's land-grant extension publishes a method — not a one-size-fits-all rate. UMaine Soil Testing Handbook 3rd Ed Revised (2026, Hoskins) — Mehlich buffer (since 2001). 3 lime equations. Live calculator uses this state's published method and citation. Enter the required soil-test values in the free calculator for tons of CaCO₃-equivalent per acre, ECCE-adjusted, with the citation.
Published source: University of Maine Soil Testing Handbook — Modified Morgan + Mehlich Buffer (3rd Revised Edition 2026)
It depends on the inputs Maine's land-grant method publishes — not a single national number. UMaine Soil Testing Handbook 3rd Ed Revised (2026, Hoskins) — Mehlich buffer (since 2001). 3 lime equations. Enter your values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
UMaine Soil Testing Handbook 3rd Ed Revised (2026, Hoskins) — Mehlich buffer (since 2001). 3 lime equations. Source: see the calculator citation. Source: University of Maine Soil Testing Handbook — Modified Morgan + Mehlich Buffer (3rd Revised Edition 2026).
Zone Forge computes Maine lime from that state's published land-grant method (the lab values required by this state's published method) — lime calculator, soil-test fertilizer, and full variable-rate prescriptions. See the science →