Soil sampling guidelines

Soil testing is an important step in planning nutrient applications to agricultural land for optimizing crop growth, yield, and quality. For accurate soil test results, a composite soil sample must be created by taking samples from several locations that are representative of the entire sampled area. Failure to take a representative sample can lead to an under or over application of nutrients.

There are two main types of soil tests used in British Columbia:

1.  Basic soil fertility test measures the pH and concentrations of phosphorus (P), potassium (K), and other plant nutrients in the upper 15 cm (6 in) of the soil.

2. Post-harvest nitrate test (PHNT) measures the amount of nitrate in the upper 30 cm (12 in) of the soil after crop harvest in the fall (September - November).

While each soil test has its unique applications, the mechanics of taking each soil sample are the same, and in some cases may be taken at the same time.

• Soil Sampling Guide summary factsheet (PDF)

Find further soil testing information on:

• Sample timing and depth
• Soil sampling methods & tools
• Sample handling, laboratory submission, and analysis

Soil testing information can also be accessed in a printable format (PDF).