v1.0 (2026-05-23) · University of Tennessee Soil, Plant and Pest Center (Nashville / Ellington Ag Center). Uses Adams-Evans family buffer (buffer pH 6.7-7.9 range matches classical AE / modified-AE / Moore-Sikora). Exact reagent (classical AE vs. Modified AE vs. Moore-Sikora) is not publicly stated on UT publications — Phase F follow-up required to lock down. Calibration target is uniform across reagent variants per Sikora & Moore 2014 SCSB-419.
This source publishes a state method — its crop-specific rate tables are maintained in the extension bulletin rather than a fixed crop list, so Zone Forge doesn't claim a crop set here.
Lime calculator. Zone Forge computes this source's published lime rates in-app and cites the method.
Yes — Zone Forge's calculators are free and need no signup. This page shows the states and crops UT Soil, Plant and Pest Center — Adams-Evans family buffer (TN) covers so you can verify the source behind your recommendation.
Browse the full Coverage Explorer — every state, crop and source — or see the science →