Minnesota's land-grant extension publishes a method — not a one-size-fits-all rate. Live inputs: Mehlich buffer acidity and crop pH goal from Minnesota'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.
Area 1 eastern + Area 2 western (Red River Valley) use same Sikora method but produce different rates.
Published source: University of Minnesota Extension — Sikora Buffer (lime) + Dual-extractant MRTN (nutrients)
It depends on the Mehlich buffer acidity value on your lab report and your crop's published pH goal, exactly as Minnesota publishes them. Enter those values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
Minnesota sizes lime from Mehlich buffer / exchangeable acidity per its own published tables. Source: University of Minnesota Extension — Sikora Buffer (lime) + Dual-extractant MRTN (nutrients).
Zone Forge computes Minnesota lime from that state's published land-grant method (Mehlich buffer / exchangeable acidity as Minnesota'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 →