Submitting Compost Samples for Analysis

Obtaining a representative sample is critical for getting a good estimate of nutrient value. Official sampling procedures for compost can be found at http://www.tmecc.org/tmecc/Table_of_Contents.html#02.

The sample submitted must be representative of the compost to be used if the analysis is to be of value. The number of sub-samples will depend on the size of the pile, but in general, take 1-pint sub-sample sizes from at least 5 places around the pile. At each place, sample 3 different depths. Take one at the surface, take the second midway between the surface and the core, and take the third at the core. Mix all of these sub-samples thoroughly in a clean 5 gallon plastic bucket. Fill the sample bag with 1 pint of this mixture. If bulk density is required, 2 quarts of this mixture must be submitted. Label sample bag with sample ID.

For submitting samples to our lab, use our lab supplies and submitting procedures.

Go to http://www.clemson.edu/agsrvlb/Supply%20List.txt to view our list of supplies.