If you believe the soil type, previous crop and fertilizer treatments are consistent across the field, treat it as one sample. If soil type and topography change across the field, different crops have been planted on different parts of the field, or there are problem spots, break the field down into smaller units to sample.

You can also shovel or dig vertically to a depth of 6 inches for row crop samples and to 4 inches for pasture samples. If the available nitrogen, chloride, or sulphur tests are desired, a subsoil sample to 24 inches is necessary.

Mix the samples together in a clean, plastic container to create a representative sample. The more sub samples you take, the more assured you’ll be that soil test results are representative of your field. Put approximately two cups of the mixed soil in a re-sealable, plastic bag. Take the soil sample to your local Extension Office.

You can let samples air dry, but do not use heat to dry your samples.

Click link below for the K-State Soil Testing Lab resource

Click link below for the Soil Fertility and Nutrient Management resource