Zone Forge reads your Missouri soil test in Missouri's own calibrated language — the critical levels and rate logic come straight from University of Missouri — Soil Test Interpretations & Recommendations Handbook (Buchholz et al., 5/2004) + Woodruff Buffer/ENM lime, not a national average.
Published source: University of Missouri — Soil Test Interpretations & Recommendations Handbook (Buchholz et al., 5/2004) + Woodruff Buffer/ENM lime
University of Missouri — Soil Test Interpretations & Recommendations Handbook (Buchholz et al., 5/2004) + Woodruff Buffer/ENM lime. Zone Forge cites the publication on every recommendation.
Yes — the Missouri soil-test recommendation calculator is free and needs no signup. Enter your lab values for source-cited P, K and lime guidance.
Zone Forge reads every Missouri soil test in its own state's language, then builds source-cited fertilizer and lime recommendations and full variable-rate prescriptions. See the science →