Zone Forge reads your South Carolina soil test in South Carolina's own calibrated language — the critical levels and rate logic come straight from South Carolina — Clemson Cooperative Extension Nutrient Recommendations (LGP 1151 + 2024 Corn Production Guide), not a national average.
Published source: South Carolina — Clemson Cooperative Extension Nutrient Recommendations (LGP 1151 + 2024 Corn Production Guide)
South Carolina — Clemson Cooperative Extension Nutrient Recommendations (LGP 1151 + 2024 Corn Production Guide). Zone Forge cites the publication on every recommendation.
Yes — the South Carolina 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 South Carolina soil test in its own state's language, then builds source-cited fertilizer and lime recommendations and full variable-rate prescriptions. See the science →