Pennsylvania's land-grant extension doesn't use a one-size-fits-all number — it uses a published method. Penn State AASL Mehlich Buffer Acidity method (meq/100 g). Enter your soil-test values in the free calculator and Zone Forge returns tons of CaCO₃-equivalent per acre, ECCE-adjusted, with the citation.
Published source: Penn State Agronomy Guide
It depends on your soil's buffer/acidity reading and your target pH — Pennsylvania publishes a method, not a single number. Penn State AASL Mehlich Buffer Acidity method (meq/100 g). Enter your values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
Penn State AASL Mehlich Buffer Acidity method (meq/100 g). Source: Penn State Agronomy Guide.
Zone Forge computes every Pennsylvania recommendation from that state's own published land-grant method — lime, soil-test fertilizer, and full variable-rate prescriptions. See the science →