Zone Forge reads your Tennessee soil test in Tennessee's own calibrated language — the critical levels and rate logic come straight from University of Tennessee — Nutrient Recommendations (M1 default + M3 dual calibration), not a national average. Lime has its own live calculator for Tennessee with method-specific lab inputs.
University of Tennessee — Nutrient Recommendations (M1 default + M3 dual calibration) rates these crops in Tennessee:
Published source: University of Tennessee — Nutrient Recommendations (M1 default + M3 dual calibration)
University of Tennessee — Nutrient Recommendations (M1 default + M3 dual calibration). Zone Forge cites the publication on every recommendation.
Yes — the Tennessee soil-test recommendation calculator is free and needs no signup. Enter your lab values for source-cited P and K; Tennessee'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. Tennessee also has a live lime calculator on Zone Forge that uses the state's published method. Open the Tennessee lime guide or lime calculator for tons of CaCO3-equivalent per acre.
Zone Forge reads every Tennessee 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 →