SUGGESTED INSTRUCTIONS FOR SUBMITTING SOIL SAMPLES
Use the following steps to submit soil samples:
1. Obtain a spade, trowel, soil tube, or soil auger free of rust and soil.
2. Dig 5-10 samples (depending on the size of the area) from the soil depth where your plants will be rooting. The
samples should represent a uniform area consisting of land that is similar in slope, texture, drainage, or other
characteristics that make the soil the same. A front and back yard would most likely be very similar to each other,
however a garden area may be different from a turf grass area.
3. Place all of the samples into a plastic container and mix well to get your final sample for submittal to the lab. If
possible, air dry the sample by spreading it out on paper towels.
4. Remove about 1 ½ - 2 cups of soil from the container and place it in a plastic bag or soil sample bag.
If more than one bag is submitted to the lab, the samples will be analyzed and invoiced as separate samples.
5. Seal the bag and label the sample with name, address and location of the sample.
6. Complete this soil sample information form as much as possible and include it with the soil sample.
7. Mail the sample to the lab using the following address: For submittal using UPS/Fed Ex please use:
Soil, Water and Plant Testing Laboratory Soil, Water and Plant Testing Laboratory
Colorado State University Colorado State University
Room A 319 NESB 200 West Lake Street
Fort Collins, CO 80523-1120 Fort Collins CO 80523-1120
8. Be sure to keep samples cool before mailing. If samples heat up; the nitrogen readings can change dramatically.
Keeping the samples in the shade will prevent excessive heating.
9. Please do not pay when you submit your samples, but if you want to pay by credit card you may provide complete
credit card information. If an invoice is required for an individual (rather than business) you will need to provide all the
information requested on the front side of the form.
10. The lab DOES NOT do herbicide or pesticide analysis.
11. If you have additional questions please contact the lab at: (970) 491-5061 or your local county Cooperative
Extension agent.
      SOIL TESTS AVAILABLE      
  Test   COMMENTS  
                 
Routine - pH, soluble salts, organic matter, nitrate-nitrogen, Basic evaluation for characterizing the soil fertility status for
phosphorus, potassium, zinc, iron, lime (estimate), texture, growing crops. A fertilizer recommendation is given. Normally this
copper and manganese.   this test is sufficient unless a special problem is suspected.
                 
Subsoil Nitrate Evaluation of nitrate supply below soil surface. Fertilizer nitrogen
  recommendation based on routine soil test of surface soil is
        adjusted if subsoil nitrate is unusually high.    
                 
Subsoil Salinity It is important to determine the salt content of subsoil for crop
        management.        
                 
Sodium Evaluation - sodium adsorption ratio (ratio of Some Colorado soils contain excess sodium. This test determines
sodium to calcium and magnesium), gypsum, and % lime. determines whether or not chemical amendments such as gypsum
        or sulfur will be effective and the amounts of these materials needed.
                 
Sulfate Colorado soils usually have sufficient quantities of this nutrient.
                 
                 
Boron, Molybdenum, Cadmium and Lead In some situations, such as near mining sites, these metals may be
  found at toxic levels.