Zone Forge reads your Massachusetts soil test in Massachusetts's own calibrated language — the critical levels and rate logic come straight from UMass Soil & Plant Nutrient Testing Lab — Modified Morgan + SMP/Sikora buffer, not a national average. Lime has its own live calculator for Massachusetts with method-specific lab inputs.
UMass Soil & Plant Nutrient Testing Lab — Modified Morgan + SMP/Sikora buffer rates these crops in Massachusetts:
More crops via alternate guides selectable in Massachusetts: New England Vegetable Management Guide 2025-2026.
Published source: UMass Soil & Plant Nutrient Testing Lab — Modified Morgan + SMP/Sikora buffer
UMass Soil & Plant Nutrient Testing Lab — Modified Morgan + SMP/Sikora buffer. Zone Forge cites the publication on every recommendation.
Yes — the Massachusetts soil-test recommendation calculator is free and needs no signup. Enter your lab values for source-cited P and K; Massachusetts'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. Massachusetts also has a live lime calculator on Zone Forge that uses the state's published method. Open the Massachusetts lime guide or lime calculator for tons of CaCO3-equivalent per acre.
Zone Forge reads every Massachusetts 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 →