Maryland's land-grant extension publishes a method — not a one-size-fits-all rate. SFM-5 Tables 2-5 serve crop goals 6.5 (agronomic crops), 7.0 (alfalfa), 5.6 (tobacco), and 5.2 (potato/sweet potato). Rates use total oxides expressed as CaCO3 equivalent; follow product oxide content, fineness, application limits and retesting guidance. Live calculator uses this state's published method and citation. Enter the required soil-test values in the free calculator for tons of CaCO₃-equivalent per acre, ECCE-adjusted, with the citation.
UMD's table uses physiographic province (Coastal Plain vs Piedmont/Mountain) as a key dimension.
Published source: University of Maryland — Texture × Province lime (SFM-5) + Maryland Nutrient Management Manual FIV-based N/P/K (combined source)
It depends on the inputs Maryland's land-grant method publishes — not a single national number. SFM-5 Tables 2-5 serve crop goals 6.5 (agronomic crops), 7.0 (alfalfa), 5.6 (tobacco), and 5.2 (potato/sweet potato). Rates use total oxides expressed as CaCO3 equivalent; follow product oxide content, fineness, application limits and retesting guidance. Enter your values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
SFM-5 Tables 2-5 serve crop goals 6.5 (agronomic crops), 7.0 (alfalfa), 5.6 (tobacco), and 5.2 (potato/sweet potato). Rates use total oxides expressed as CaCO3 equivalent; follow product oxide content, fineness, application limits and retesting guidance. Source: see the calculator citation. Source: University of Maryland — Texture × Province lime (SFM-5) + Maryland Nutrient Management Manual FIV-based N/P/K (combined source).
Zone Forge computes Maryland lime from that state's published land-grant method (the lab values required by this state's published method) — lime calculator, soil-test fertilizer, and full variable-rate prescriptions. See the science →