You can also collect samples with animals in the pen. Manure characteristics change as it accumulates in the pen. For large feedlots, you should sample representative pens of the same age. Estimate total feedlot characteristics by counting numbers of pens having the same age. Once a manure sample is collected, ship in an airtight container to the laboratory of your choice.
Many laboratories supply sampling kits on request.
Ship liquid and slurry samples in a quart sized plastic bottle with a screw top lid. Only fill the bottle half-full to allow for gas expansion. If the bottle has collapsible sides, squeeze slightly before screwing on the lid. Place a second plastic bag over both liquid and solid samples for extra safety. Use cardboard boxes to ship sample bottles and bags.