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Animal nutrient quality in forage varies greatly between and within bales. Therefore, many bales need to be sampled to obtain a "representative" sample. This requires use of coring tools that are easy to use, probe deeply into bales, and cut clean uniform cores.
Hay Sampling Instructions
The proper sampling method is imperative for an accurate assessment of forage quality. Follow the hay sampling guidelines by Bill Weiss, dairy nutritionist at Ohio State University, as published in Dairy Herd Management:
- Use a core sampler specifically designed for hay.
- Make sure the sampler has a sharp cutting surface. A dull blade tends to collect more leaves, creating an unrepresentative sample.
- Take from four to seven samples from large square bales. Take samples from each cutting of hay.
- Sample large bales from the center end of the bale. The probe should be long enough to reach halfway through the bale. Keep the hay probe parallel to the ground when taking a sample.
- Place core samples from each bale group in a single plastic bag. Do not divide the sample. This causes separation of leaves and stems. Send the entire bag to the lab for testing. Test must be express mailed the same day as the sample is taken. Each day the sample is held affects the results.
- Hay being placed in protective storage can be sampled any time after harvest. If bales remain outside, wait until just before feeding to sample.
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