Representative Samples are Most Important
The most critical element in the overall soil testing procedure is the collection of a representative sample. We use a soil probe to collect uniform sub-samples in sufficient numbers to provide you with the most representative sample possible.
Soil Sampling and Testing
Soil testing is the most reliable and environmentally sound method of determining the amounts of fertilizer and lime to apply. In addition, fertility problems, such as soil that is too acid, can reduce the effectiveness of applied fertilizers and can even increase susceptibility to some pest problems. While landscape maintenance procedures can be completed without testing the soil, we strongly recommend having a soil test done, especially before establishment or renovation. A soil test is recommended about every 3 to 5 years (more often if a fertility problem is diagnosed).
Reliable Recommendations
We use the University of Tennessee soil testing laboratory because it uses state-of-the art testing equipment and procedures combined with in-field testing to generate the most reliable fertilizer and lime recommendations for each area of Tennessee. Customers can collect their own samples and have them tested at the lab; however, remember that a representative sample is most important. If you choose to collect your own samples, instructions can be found in this online publication from the University of Tennessee – PB1061.pdf
How many samples are needed?
That depends on how uniform the soil is and how it has been handled in the past. A representative sample (composed of several 6-inch deep sub-samples) is taken from each management area of the landscape. If the landscape is completely uniform and has been fertilized the same for the past 5 years, only one sample is needed. Generally, most homeowners will need more than one sample; for example, the front yard (sample #1), the back yard (sample #2), shrub or flower bed (sample #3) and so on. Only one sample is necessary from each management area even if it contains different plants to be fertilized. For example, a shade tree in the front lawn needs different fertilization than the grass, but the rates for both can be calculated from the same sample.
