Minnesota's land-grant extension publishes a method — not a one-size-fits-all rate. Live inputs: UMN area, soil kind, crop, water pH and the buffer index where Table 1 requires it. Enter the required soil-test values in the free calculator for tons of CaCO₃-equivalent per acre, ECCE-adjusted, with the citation.
UMN Lime needs in Minnesota Tables 1-3 use Area 1 and Area 2. Choose your area from the publication map and identify the soil as mineral or organic.
Published source: University of Minnesota Extension — Sikora Buffer (lime) + Dual-extractant MRTN (nutrients)
Choose your area using UMN's map and choose mineral or organic soils. For mineral soils below water pH 6.0, enter the lab's Sikora/SMP buffer index. UMN Lime needs in Minnesota Tables 1-3 give pounds of effective neutralizing power (ENP) per acre for the published crop goal.
UMN Tables 1-3 use separate Area 1 and Area 2 columns. Mineral-soil goals are 6.0 or 6.5 by crop; the organic-soil goal is 5.5. 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 (UMN Area 1 or Area 2, mineral or organic soils, crop and water pH) — lime calculator, soil-test fertilizer, and full variable-rate prescriptions. See the science →