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Soils - Part 9: Fundamentals of Soil Testing

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Sample Preparation

For best results, soil samples should be air dried before they are sent to the laboratory for analysis. Samples should be dry to the touch. Break up as many clods as possible before drying. Usually, this can be done easily by hand when samples are moist. In drying soils:

 — do not apply heat;
 — a simple fan may be used to speed drying;
 — spread the soil out on clean paper; and
 — protect the soil from contamination from any source, especially fertilizer, any kind of dust, cigarette ashes, and cats.

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