New Hampshire's land-grant extension publishes a method — not a one-size-fits-all rate. UNH uses Mehlich Lime Buffer pH (Hoskins-modified Mehlich). Live inputs: Mehlich buffer acidity and crop pH goal from New Hampshire's published method. Enter the required soil-test values in the free calculator for tons of CaCO₃-equivalent per acre, ECCE-adjusted, with the citation.
Published source: UNH Soil Testing Service — Mehlich Lime Buffer pH
It depends on the Mehlich buffer acidity value on your lab report and your crop's published pH goal, exactly as New Hampshire publishes them. UNH uses Mehlich Lime Buffer pH (Hoskins-modified Mehlich). Enter those values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
New Hampshire sizes lime from Mehlich buffer / exchangeable acidity per its own published tables. UNH uses Mehlich Lime Buffer pH (Hoskins-modified Mehlich). Source: UNH Soil Testing Service — Mehlich Lime Buffer pH.
Zone Forge computes New Hampshire lime from that state's published land-grant method (Mehlich buffer / exchangeable acidity as New Hampshire's published lime method reads it, with the crop's published pH goal) — lime calculator, soil-test fertilizer, and full variable-rate prescriptions. See the science →