Vermont's land-grant extension doesn't use a one-size-fits-all number — it uses a published method. UVM AETL uses reactive aluminum + pH + target pH (Magdoff & Bartlett 1982). Unique among the 50 states. vermont_reactive_al v2.0 (2026-05-27) — lime block unchanged from v1.0 (BR 1390.3 Table 3 verbatim now shipped in lime_lookup_table3 alongside the engine's linear-approximation equation); combined source now also carries comprehensive nutrient block. 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: University of Vermont — Reactive Aluminum + Modified Morgan (UVM AETL)
It depends on your soil's buffer/acidity reading and your target pH — Vermont publishes a method, not a single number. UVM AETL uses reactive aluminum + pH + target pH (Magdoff & Bartlett 1982). Unique among the 50 states. vermont_reactive_al v2.0 (2026-05-27) — lime block unchanged from v1.0 (BR 1390.3 Table 3 verbatim now shipped in lime_lookup_table3 alongside the engine's linear-approximation equation); combined source now also carries comprehensive nutrient block. Enter your values in the free Zone Forge lime calculator for tons of CaCO3-equivalent per acre, with the citation.
UVM AETL uses reactive aluminum + pH + target pH (Magdoff & Bartlett 1982). Unique among the 50 states. vermont_reactive_al v2.0 (2026-05-27) — lime block unchanged from v1.0 (BR 1390.3 Table 3 verbatim now shipped in lime_lookup_table3 alongside the engine's linear-approximation equation); combined source now also carries comprehensive nutrient block. Source: University of Vermont — Reactive Aluminum + Modified Morgan (UVM AETL).
Zone Forge computes every Vermont recommendation from that state's own published land-grant method — lime, soil-test fertilizer, and full variable-rate prescriptions. See the science →