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.
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, K and lime guidance.
Zone Forge reads every Massachusetts soil test in its own state's language, then builds source-cited fertilizer and lime recommendations and full variable-rate prescriptions. See the science →