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Soil Testing
and Plant Diagnostic Services

Plant Diagnostic Clinic

Plant Nematology Laboratory

Soil and Plant Testing Laboratory

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Soil and Plant Testing Laboratory
573-882-0623

Soil test procedures

• Soil pH_s (1:1 solution:soil suspension). Solution is 0.01M CaCl₂
• Lime requirement (neutralizable acidity) uses the Woodruff buffer solution
• Organic matter percentage by loss on ignition
• Extractable phosphorus (Bray-1 P)
• Exchangeable potassium (ammonium acetate extraction)
• Exchangeable calcium (ammonium acetate extraction)
• Exchangeable magnesium (ammonium acetate extraction)
• Cation exchange capacity (estimated from exchangeable potassium, calcium, magnesium and neutralizable acidity)
• Extractable zinc (DPTA extraction)
• Extractable sulfur (calcium phosphate in acetic acid extraction)
• Extractable iron, manganese and copper (DPTA extraction)
• Exchangeable sodium (ammonium acetate extraction)
• Hot water extractable boron (0.1 percent CaCl₂. H₂0)
• Nitrate-nitrogen and ammonium-nitrogen (2 M KCl extraction)
• Soluble salts (electrical conductivity in a 1:1 soil:water saturation extraction)
• Particle size analysis (hydrometer method)

Soil test procedures for MU laboratories, PDF
Recommended Chemical Soil Test Procedures for the North Central Region

Updated 8/11/06

Online services

• Access soil test results
• Recommendations online

Submitting soil samples

• Commercial fruits and vegetables
• Field crops
• Garden, landscape and lawn
• Orchard and vineyard
• Turf

Submitting plant samples

• Commercial fruits and vegetables
• Field crops
• Garden, landscape and lawn
• Orchard and vineyard

Submitting other samples

• Compost
• Greenhouse growing media
• Manure
• Water

Contact

Soil and Plant Testing Laboratory

• 23 Mumford Hall
  Columbia, MO 65211
• Phone
  573-882-0623
• Fax
  573-884-4288
• E-mail
  soiltestingservices@missouri.edu

Soil Testing Laboratory Delta Research Center

• P.O. Box 160
  Portageville, MO 63873
• Phone
  573-379-5431
• Fax
  573-379-5875

Related pages

• EQ215, Laboratory Analysis of Manure
• EQ453, Precision Agriculture: Remote Sensing and Ground Truthing
• G4620, Bermudagrass
• G9111, Using Your Soil Test Results
• G9112, Interpreting Missouri Soil Test Reports
• G9215, Soil Sampling Pastures
• G9217, Soil Sampling Hayfields and Row Crops
• G6954, Soil Testing for Lawns
• G9177, Preplant Nitrogen Test for Adjusting Corn Nitrogen Recommendations
• MP733, Lawn and Garden Soil Test Interpretations and Fertilizer Recommendation Guide
• SB1001, Recommended Chemical Soil Test Procedures for the North Central Region
• WQ450, Precision Agriculture: An Introduction
• WQ451, Precision Agriculture: Yield Monitors
• WQ452, Precision Agriculture: Global Positioning System (GPS)