Zone Forge reads your Minnesota soil test in Minnesota's own calibrated language — the critical levels and rate logic come straight from University of Minnesota Extension — Sikora Buffer (lime) + Dual-extractant MRTN (nutrients), not a national average. Lime has its own live calculator for Minnesota with method-specific lab inputs.
University of Minnesota Extension — Sikora Buffer (lime) + Dual-extractant MRTN (nutrients) rates these crops in Minnesota:
Published source: University of Minnesota Extension — Sikora Buffer (lime) + Dual-extractant MRTN (nutrients)
University of Minnesota Extension — Sikora Buffer (lime) + Dual-extractant MRTN (nutrients). Zone Forge cites the publication on every recommendation.
Yes — the Minnesota soil-test recommendation calculator is free and needs no signup. Enter your lab values for source-cited P and K; Minnesota's live lime calculator is available separately with its own required lab inputs.
Yes — the free soil-test calculator covers source-cited P and K. Minnesota also has a live lime calculator on Zone Forge that uses the state's published method. Open the Minnesota lime guide or lime calculator for tons of CaCO3-equivalent per acre.
Zone Forge reads every Minnesota soil test in its own state's language, then builds source-cited fertilizer and a live lime calculator and full variable-rate prescriptions. See the science →