Rhode Island's land-grant extension doesn't use a one-size-fits-all number — it uses a published method. URI has no full agronomic lab; refers RI samples to UConn or UMass. 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: UConn Soil Nutrient Analysis Laboratory — SMP / Sikora buffer
It depends on your soil's buffer/acidity reading and your target pH — Rhode Island publishes a method, not a single number. URI has no full agronomic lab; refers RI samples to UConn or UMass. Enter your values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
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 every Rhode Island recommendation from that state's own published land-grant method — lime, soil-test fertilizer, and full variable-rate prescriptions. See the science →