Zone Forge reads your Maryland soil test in Maryland's own calibrated language — the critical levels and rate logic come straight from University of Maryland — Texture × Province lime (SFM-5) + Maryland Nutrient Management Manual FIV-based N/P/K (combined source), not a national average. Lime has its own live calculator for Maryland with method-specific lab inputs.
University of Maryland — Texture × Province lime (SFM-5) + Maryland Nutrient Management Manual FIV-based N/P/K (combined source) rates these crops in Maryland:
More crops via alternate guides selectable in Maryland: Mid-Atlantic Commercial Vegetable Production Recommendations 2026/2027.
Published source: University of Maryland — Texture × Province lime (SFM-5) + Maryland Nutrient Management Manual FIV-based N/P/K (combined source)
University of Maryland — Texture × Province lime (SFM-5) + Maryland Nutrient Management Manual FIV-based N/P/K (combined source). Zone Forge cites the publication on every recommendation.
Yes — the Maryland soil-test recommendation calculator is free and needs no signup. Enter your lab values for source-cited P and K; Maryland'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. Maryland also has a live lime calculator on Zone Forge that uses the state's published method. Open the Maryland lime guide or lime calculator for tons of CaCO3-equivalent per acre.
Zone Forge reads every Maryland 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 →