Zone Forge reads your Delaware soil test in Delaware's own calibrated language — the critical levels and rate logic come straight from Delaware — UD Cooperative Extension Soil Testing Program (Mehlich-3 / UD-FIV), not a national average.
Published source: Delaware — UD Cooperative Extension Soil Testing Program (Mehlich-3 / UD-FIV)
Delaware — UD Cooperative Extension Soil Testing Program (Mehlich-3 / UD-FIV). Zone Forge cites the publication on every recommendation.
Yes — the Delaware 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 Delaware soil test in its own state's language, then builds source-cited fertilizer and lime recommendations and full variable-rate prescriptions. See the science →