Missouri's land-grant extension doesn't use a one-size-fits-all number — it uses a published method. MU uses Woodruff buffer → Neutralizable Acidity → ENM lb/A. Missouri is the only state still on Woodruff. v2.0 ships 3 ENM table formulas verbatim + soil-region pH-target overrides. Enter your soil-test values in the free calculator and Zone Forge returns tons of CaCO₃-equivalent per acre, ECCE-adjusted, with the citation.
Soil regions 5/6/7/8 (Cherokee Prairies, Ozarks, Ozark Borders) target pHs 6.6-7.0 for alfalfa due to high subsoil acidity; all other crops/regions use 5.6-6.0 or 6.1-6.5 ranges. ENM equations now ship verbatim from Buchholz 2004 Tables XIV/XV/XVI (v2.0, 2026-05-27).
Published source: University of Missouri — Soil Test Interpretations & Recommendations Handbook (Buchholz et al., 5/2004) + Woodruff Buffer/ENM lime
It depends on your soil's buffer/acidity reading and your target pH — Missouri publishes a method, not a single number. MU uses Woodruff buffer → Neutralizable Acidity → ENM lb/A. Missouri is the only state still on Woodruff. v2.0 ships 3 ENM table formulas verbatim + soil-region pH-target overrides. Enter your values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
MU uses Woodruff buffer → Neutralizable Acidity → ENM lb/A. Missouri is the only state still on Woodruff. v2.0 ships 3 ENM table formulas verbatim + soil-region pH-target overrides. Source: University of Missouri — Soil Test Interpretations & Recommendations Handbook (Buchholz et al., 5/2004) + Woodruff Buffer/ENM lime.
Zone Forge computes every Missouri recommendation from that state's own published land-grant method — lime, soil-test fertilizer, and full variable-rate prescriptions. See the science →