New Hampshire's land-grant extension doesn't use a one-size-fits-all number — it uses a published method. UNH uses Mehlich Lime Buffer pH (Hoskins-modified Mehlich). 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: UNH Soil Testing Service — Mehlich Lime Buffer pH
It depends on your soil's buffer/acidity reading and your target pH — New Hampshire publishes a method, not a single number. UNH uses Mehlich Lime Buffer pH (Hoskins-modified Mehlich). Enter your values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
UNH uses Mehlich Lime Buffer pH (Hoskins-modified Mehlich). Source: UNH Soil Testing Service — Mehlich Lime Buffer pH.
Zone Forge computes every New Hampshire recommendation from that state's own published land-grant method — lime, soil-test fertilizer, and full variable-rate prescriptions. See the science →