NCDA&CS Agronomic Division — Mehlich-3 + Humic-Matter Lime + Orange Book Crop Fertilization

v2.4 (2026-08-23) · Hardy, D.H., Tucker, M.R., Stokes, C.E. (2014). Crop Fertilization Based on North Carolina Soil Tests, Circular No. 1, North Carolina Department of Agriculture & Consumer Services–Agronomic Division ('Orange Book'). Phosphorus update: Gatiboni, L., and Hardy, D. (Oct 28 2021). 'Changes in the Phosphorus Fertilizer Recommendations for Corn, Soybean, and Small Grains in North Carolina,' NC State Extension SoilFacts AG-439-90.

State extension method Computes rates in-app Lime / pH

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Crops covered

AlfalfaAsparagus establishmentAsparagus maintenanceBahiaBahiagrassBarleyBeetsBermudagrassBlueberryBlueberry establishmentBlueberry maintenanceBluegrassBroccoli brussels cauliflowerCabbageCanolaCantaloupeChile peppersCloverCornCorn silageCottonCucumbersDry beansFescueForage legumesGamagrassGrapesGrass hayKenafMustardOatsOkraOrchardgrassPeanutsPeasPotatoesPrairiegrassPumpkinRadishRaspberry blackberry establishmentRaspberry blackberry maintenanceRyeSmall grainsSorghumSorghum silageSoybeansSquashSquash pumpkinStrawberryStrawberry establishmentStrawberry maintenanceSunflowerSweet cornSweetcornSweetpotatoSwitchgrassTimothyTobaccoTomatoesTurnipVegetables (general)WatermelonWheat

Nutrient source for

Lime / pH source for

Frequently asked

What method does NCDA&CS Agronomic Division — Mehlich-3 + Humic-Matter Lime + Orange Book Crop Fertilization use?

State extension method. Zone Forge computes this source's supported nutrient rates in-app and cites the published method. Its published lime method is computed in-app too.

Is this free to use?

Yes — Zone Forge's calculators are free and need no signup. This page shows the states and crops NCDA&CS Agronomic Division — Mehlich-3 + Humic-Matter Lime + Orange Book Crop Fertilization covers so you can verify the source behind your recommendation.

Browse the full Coverage Explorer — every state, crop and source — or see the science →