Zone Forge reads your Alaska soil test in Alaska's own calibrated language — the critical levels and rate logic come straight from Alaska — UAF Cooperative Extension Service, not a national average.
Per Alaska — UAF Cooperative Extension Service — below the critical level, a yield response to the added nutrient is expected.
Published source: Alaska — UAF Cooperative Extension Service
Alaska — UAF Cooperative Extension Service. Zone Forge cites the publication on every recommendation.
Yes — the Alaska 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 Alaska soil test in its own state's language, then builds source-cited fertilizer and lime recommendations and full variable-rate prescriptions. See the science →