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Soil Testing From the Lab to the Field

Soil Testing From the Lab to the Field. Greg Schwab, Extension Soil Specialist 2010 Agent Update. North American Proficiency Testing Program (NAPT). Program administered by American Soc. Agronomy Evaluates lab performance on blind samples Lab results should be consistent among participants.

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Soil Testing From the Lab to the Field

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  1. Soil Testing From the Lab to the Field Greg Schwab, Extension Soil Specialist 2010 Agent Update

  2. North American Proficiency Testing Program (NAPT) • Program administered by American Soc. Agronomy • Evaluates lab performance on blind samples • Lab results should be consistent among participants http://www.naptprogram.org/about/participants

  3. North American Proficiency Testing Program (NAPT) • Soil extractant may differ • Reported units may differ • Fertilizer recommendations might be vastly different Results should be consistent among participants BUT…

  4. Making Fertilizer Recommendations • Uses Mehlich 3 extractant for relevant nutrients • Reports results in lbs/acre • Makes recommendations that are relatively conservative Remember UK Soil Testing Lab

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