Zone Forge reads your Michigan soil test in Michigan's own calibrated language — the critical levels and rate logic come straight from Tri-State Fertilizer Recommendations (2020), not a national average. Lime has its own live calculator for Michigan with method-specific lab inputs.
Per Tri-State Fertilizer Recommendations (2020) — below the critical level, a yield response to the added nutrient is expected.
Tri-State Fertilizer Recommendations (2020) rates these crops in Michigan:
Published source: Tri-State Fertilizer Recommendations (2020)
Tri-State Fertilizer Recommendations (2020). Zone Forge cites the publication on every recommendation.
Yes — the Michigan soil-test recommendation calculator is free and needs no signup. Enter your lab values for source-cited P and K; Michigan'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. Michigan also has a live lime calculator on Zone Forge that uses the state's published method. Open the Michigan lime guide or lime calculator for tons of CaCO3-equivalent per acre.
Zone Forge reads every Michigan 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 →