Coverage · Source

Virginia Tech Soil Testing Laboratory — Mehlich-1 + Modified Mehlich Buffer (combined source)

v2.5 (2026-08-23) · Maguire, R.O. & Heckendorn, S.E. (November 2023), 'Soil Test Recommendations for Virginia', Virginia Cooperative Extension, Virginia Tech Soil Testing Laboratory. Companion VCE publications: 452-701 (Explanation of Soil Tests), 452-881 / SPES-91P (Laboratory Procedures, rev. March 2024), VCE Agronomy Handbook 424-100 (2023). Regulatory backstop: Virginia DCR 'Virginia Nutrient Management Standards and Criteria' — Virginia Tech M-1 scale is the only one accepted for VA NMP work; other labs must convert.

State extension method Computes rates in-app Lime / pH
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Crops covered

AlfalfaAsparagus - New HybridsAsparagus - Nonhybrid StrainsBarleyBermudagrassBlueberriesBlueberryCanolaCloverCornCorn silageCottonFescueGrapesGrass / forageGrass hayGreen beansLimaLima beansOatsPasturePeanutsPotatoesPumpkinPumpkinsRyeSorghumSorghum silageSoybeansSweet cornTobaccoWatermelonWatermelons – Non-irrigatedWheat

Nutrient source for

VA

Lime / pH source for

VA

Frequently asked

What method does Virginia Tech Soil Testing Laboratory — Mehlich-1 + Modified Mehlich Buffer (combined source) 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 Virginia Tech Soil Testing Laboratory — Mehlich-1 + Modified Mehlich Buffer (combined source) covers so you can verify the source behind your recommendation.

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