Knowing the pH and nutrient content of your soil is important to successful growing.

Knowing the pH and nutrient content of your soil is important to successful growing.

How To Take A Soil Sample

1. When should soil be sampled?

Soil samples can be taken at any time during the year; however, avoid extremely wet soil conditions unless absolutely necessary.

2. How often should I have my soil tested?
For most crops, every 2 to 3 years. Soil under intensive cultivation may require annual testing. Sampling from any given area should be done at about the same time as in previous years.

3. What tool shall I use for sampling?
A soil probe or auger is best; if not available, use a garden spade or shovel.
For cultivated crops and gardens, samples are taken to the tillage depth (6-10")
For no till or minimum till, take one sample at 0 - 1" and another at a 1 - 6" depth.

4. What is the proper sampling depth?
For cultivated crops and gardens
, sample at 0 - 1" and another at 1 - 6" depth.
For lawns and pastures
, a sample from the upper 6" is satisfactory; remove plant residue.
For tree and fruit crops, 2 samples should be submitted, one taken at 0 - 8" depth, the other at 8 - 16" (subsoil layer).

5. How do I go about collecting the sample?
With a shovel, dig a hole to the sampling depth. Cut a ½" slice from the face of the hole and trim the sides so you have a vertical slice of soil.

6. How many samples should I collect from each area?
Repeat the sampling process in about 4 to 6 locations in the area you want tested (or 10 to 15 locations throughout a larger garden or field). Mix the samples in a plastic bucket to obtain a representative composite sample. Avoid sampling in unusual areas if the objective is to estimate average fertility levels over the entire area. Place 1 ½ to 2 cups of the composite soil in a plastic zip-lock bag and label the bag with your name, phone number, the location (for example: lawn, vegetable garden, perennial garden, etc.), and the date.

7. What if I have an area of poor crop growth?

If you have a trouble spot, a separate sample taken from this area may be necessary.

8. Should the sample be dry?
Do not bring in wet samples. If it is necessary to sample wet soil, spread the sample on a sheet of newspaper and allow it to dry at room temperature.

9. How much soil is needed for each composite sample?
About two cups are required.

10.Where do I bring samples?
In Warren County, please bring samples to: Cornell Cooperative Extension Education Center, 377 Schroon River Road, Warrensburg, NY 12885 between 8:30 a.m. and 4:30 p.m., Monday through Thursday. Testing for pH alone is done on-site at the Education Center. Nutrient tests (for example, for N-P-K) and specialized tests are sent out to an area laboratory. For more information on available tests, please send us an e-mail at: or call: 518-623-3291.

11. What information needs to accompany the samples?
For cultivated crops

Soil name and map symbol from soil survey (available at the Cooperative Extension Education Center)
Tillage depth
Past crops
Future crops to be grown
Cover crops
Manure rates, if applied

For gardens, lawns, trees:

Site characteristics
Crop to be grown
Age of crop
Fertilizer used
Manure rates applied

12. How long will it take to get test results?
pH tests are conducted at the Cooperative Extension Education Center and take from 1 - 3 days. Complete nutrient tests take about 1 - 2 weeks. Results are mailed from the lab directly to you, and a copy also is sent to our office.

13. What if I have questions about the results?
In Warren County, call us at (518) 623-3291.

14. How much do the tests cost?
- pH test(for up to 3 samples): The first sample is free. For additional samples there is a charge of $1.00 per sample.
- Cornell pH testing kits are $20 for normal range (pH 5.0 to 7.2), and $25 for an expanded (wide) range (pH 3.8 to 8.2).
- A standard soil analysis test: $18 per sample.
The fees are payable when the sample is submitted to the Cooperative Extension Center.

Last updated June 19, 2018