Maine's land-grant extension doesn't use a one-size-fits-all number — it uses a published method. UMaine Soil Testing Handbook 3rd Ed Revised (2026, Hoskins) — Mehlich buffer (since 2001). 3 lime equations. 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: University of Maine Soil Testing Handbook — Modified Morgan + Mehlich Buffer (3rd Revised Edition 2026)
It depends on your soil's buffer/acidity reading and your target pH — Maine publishes a method, not a single 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: University of Maine Soil Testing Handbook — Modified Morgan + Mehlich Buffer (3rd Revised Edition 2026).
Zone Forge computes every Maine recommendation from that state's own published land-grant method — lime, soil-test fertilizer, and full variable-rate prescriptions. See the science →