Page 154 - Nutrient Management Planning Guide

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Manure Sampling

Sampling Liquid Manure from a Storage Facility

Toss the bucket or extend the sampling device 1.

(composite or pole-and-cup) into the lagoon at least two metres (6 ft) from the edge. If using the bucket-and-toss method, begin quickly pulling the bucket back to the bank as soon as it breaks the surface of the liquid, pulling it through the top 30 cm (12 in). If possible, avoid collecting any floating debris or scum remaining on the surface after agitation.

If using the composite sampling device, extend it far enough to collect a column of manure and then seal off the tube using either a ball plug on the bottom (attached to a handle at the top) or by covering the top of the pipe with a hand to create an air lock. Empty the sample into the 20 L (5 gal) pail or 2.

garbage can. If using a composite sampling device, place the end of the pipe into the 20 L (5 gal) pail and release the airlock or ball plug to empty the pipe. Depending on the size of the bucket used (bucket-and-toss), a plastic garbage can may be required to collect and mix samples.

Move around the lagoon and repeat the above 3.

procedure eight to 12 times (four to six times if using bucket-and-toss method) to obtain samples from various locations around the perimeter of the lagoon. Mix collected samples thoroughly in a plastic pail.

Refer to steps 3 and 4 in the procedure for 4.

sampling liquid manure during application for sub-sampling and handling instructions prior to shipping.

Sampling Techniques for Solid Manure

When sampling manure, take note of visible variations in moisture and bedding. When considerable variation is observed, multiple composite samples should be taken and sent for analysis. This will ensure that test results reflect the average for the entire source. Avoid sampling from areas where moisture and bedding is considerably different from the average of the pile.

The following section outlines procedures for:

In-barn sampling of poultry litter • Sampling during application • Sampling stockpiles •

In-Barn Sampling of Poultry Litter

The composition of dry litter can vary throughout the barn. For instance, material under feeders and waterers is different than that material against the walls. Consider these differences when devising a strategy for collecting samples. There are two suggested methods for in-barn sampling of poultry litter: the point and trench methods.

Assemble the following equipment:

20 L (5 gal) plastic pail • wheelbarrow • narrow, square-ended spade or solid manure- •

sampling probe (Figure 4.2.4) tarp or piece of plywood • one or more large plastic re-sealable freezer bags •

Follow these steps when using the point method to sample poultry litter: