Quick fact sheet to explain soil testing.
- A sound fertilizer or manure recommendation depends on a quality soil sample.
- A composite soil sample should represent a uniform field area.
- Use a systematic sampling scheme, and a minimum of 15 subsamples throughout the field, regardless of acreage.
- Sampling depth depends on the crop and the tillage depth.
- Sample most fields every year for nitrate analyses.
- Thoroughly air dry all soil samples within 12 hours after sampling.
- See Selecting an Analytical Laboratory for important information on choosing a reputable lab.