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