Kansas · Soil test

Kansas soil-test fertilizer recommendations

Zone Forge reads your Kansas soil test in Kansas's own calibrated language — the critical levels and rate logic come straight from Kansas State University — Soil Test Interpretations & Fertilizer Recommendations (MF2586), not a national average.

See Kansas recommendations → Kansas lime guide

Critical soil-test levels

  • P: critical 20 ppm (Mehlich-3 colorimetric (or Bray P1))
  • K: critical 130 ppm (Mehlich-3 or NH4OAc extractable)

Per Kansas State University — Soil Test Interpretations & Fertilizer Recommendations (MF2586) — below the critical level, a yield response to the added nutrient is expected.

Published source: Kansas State University — Soil Test Interpretations & Fertilizer Recommendations (MF2586)

Frequently asked

What soil-test method does Kansas use?

Kansas State University — Soil Test Interpretations & Fertilizer Recommendations (MF2586). Zone Forge cites the publication on every recommendation.

Is the Kansas soil-test calculator free?

Yes — the Kansas 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 Kansas soil test in its own state's language, then builds source-cited fertilizer and lime recommendations and full variable-rate prescriptions. See the science →