Rhode Island's land-grant extension publishes a method — not a one-size-fits-all rate. URI has no full agronomic lab; refers RI samples to UConn or UMass. Live inputs: Mehlich buffer acidity and crop pH goal from Rhode Island's published method. Enter the required soil-test values in the free calculator for tons of CaCO₃-equivalent per acre, ECCE-adjusted, with the citation.
Published source: UConn Soil Nutrient Analysis Laboratory — SMP / Sikora buffer
It depends on the Mehlich buffer acidity value on your lab report and your crop's published pH goal, exactly as Rhode Island publishes them. URI has no full agronomic lab; refers RI samples to UConn or UMass. Enter those values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
Rhode Island sizes lime from Mehlich buffer / exchangeable acidity per its own published tables. URI has no full agronomic lab; refers RI samples to UConn or UMass. Source: UConn Soil Nutrient Analysis Laboratory — SMP / Sikora buffer.
Zone Forge computes Rhode Island lime from that state's published land-grant method (Mehlich buffer / exchangeable acidity as Rhode Island's published lime method reads it, with the crop's published pH goal) — lime calculator, soil-test fertilizer, and full variable-rate prescriptions. See the science →