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Submitting Animal Waste Samples for Analysis

Obtaining a representative sample is critical for getting a good estimate of nutrient value. General sampling procedures for solid and liquid waste can be found in the publication "Recommended Methods of Manure Analysis A3769".

The sample submitted must be representative of the waste to be land applied if the analysis is to be of value.  The nutrient content of animal waste is affected by several factors:  The type and size of animal, the feed source, the animal housing unit, the storage and handling of the waste, and the time of the year.  If any of these factors differ among wastes, separate samples should be obtained.

For submitting samples to our lab, use our lab supplies and submitting procedures.  Do not use the solid waste bags for any other purpose except for submitting solid animal waste.  Go to Order Form to view our list of supplies.

Our lab bags must be used for submitting solid samples to the lab.  Do not use any other bags for submitting solid waste samples.  About a cup of liquid is required for liquid samples.  Do not submit more than a cup of liquid.  Lab bottles are available for liquids.

If several weeks expire between sampling and application or if rainfall or waste additions alter the waste, another sample should be obtained.

Solid Wastes

For submitting samples to our lab, mix the composite sample thoroughly, then using the laboratory bags place about a pint of solid waste in the small inner bag.  Label the inner bag with the sample ID used to identify the sample on the sample submission form.  Twist-tie inner bag then zip-lock in large outer bag.  Keep the sample cool.  If the waste sample is not mailed to the Lab on the same day it is sampled, it should be kept refrigerated.

Liquid Wastes

For submitting samples to our lab, mix the composite liquid thoroughly, and then obtain about a cup of the liquid for the sample.  Fill the laboratory sampling bottle leaving 1 inch of air space for the sample to expand.  Keep the sample cool.  If the waste sample is not mailed to the Lab on the same day it is sampled, it should be kept refrigerated.

Soil Sample

Soil samples should be obtained from the fields on which the animal waste will be applied and their nutrient status determined.