v1.3.1 (2026-08-23) · Wortmann, Krienke, Ferguson, Maharjan, Shapiro, et al. UNL Extension Circulars: EC117 'Nutrient Management Suggestions for Corn' (2023 revision); EC155 'Nutrient Management for Agronomic Crops in Nebraska' (Revised December 2023, 150 pp.); G859 'Fertilizer Recommendations for Soybean' (Revised December 2018); G2365 'In-Season Nitrogen Management for Irrigated Corn' (2024). Lime guidance is in the separately-shipped nebraska_g1504 source (UNL G1504 'Lime Use for Soil Acidity Management') — do NOT duplicate lime here.
State extension method. Zone Forge computes this source's supported nutrient rates in-app and cites the published method.
Yes — Zone Forge's calculators are free and need no signup. This page shows the states and crops UNL EC117 / EC155 / G859 — Nebraska nutrient recommendations (lime in separate nebraska_g1504) covers so you can verify the source behind your recommendation.
Browse the full Coverage Explorer — every state, crop and source — or see the science →