Zone Forge reads your Idaho soil test in Idaho's own calibrated language — the critical levels and rate logic come straight from University of Idaho — Northern ID (dryland Palouse) + Southern ID (irrigated Snake River Plain) Fertilizer Guides, not a national average. Lime has its own live calculator for Idaho with method-specific lab inputs.
University of Idaho — Northern ID (dryland Palouse) + Southern ID (irrigated Snake River Plain) Fertilizer Guides rates these crops in Idaho:
More crops via alternate guides selectable in Idaho: PNW 615 — Nutrient Management for Field Corn Silage and Grain in the Inland Pacific Northwest.
Published source: University of Idaho — Northern ID (dryland Palouse) + Southern ID (irrigated Snake River Plain) Fertilizer Guides
University of Idaho — Northern ID (dryland Palouse) + Southern ID (irrigated Snake River Plain) Fertilizer Guides. Zone Forge cites the publication on every recommendation.
Yes — the Idaho soil-test recommendation calculator is free and needs no signup. Enter your lab values for source-cited P and K; Idaho'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. Idaho also has a live lime calculator on Zone Forge that uses the state's published method. Open the Idaho lime guide or lime calculator for tons of CaCO3-equivalent per acre.
Zone Forge reads every Idaho 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 →