SSMG-4 (B. Vaughan)

How to Determine an Accurate Soil Testing Laboratory

Summary:

Many people have said that soil testing laboratories are good enough considering the amount of field variability. With the advent of global positioning system (GPS) technology, soil sampling variability is minimized. Now, soil testing laboratories must be more accurate and reproducible to match the improved accuracy and precision achieved with GPS soil sampling. How can you know if the laboratory you are using produces good numbers? You can determine laboratory accuracy by: 1) knowing the difference between accuracy and precision, 2) know what questions to ask a laboratory, and 3) setting realistic expectations of laboratory quality.

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