The Value of Refuse Screenings as a Feed for Livestock

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Abstract
Refuse screenings are a combination of materials obtained in the process of cleaning grain, such as light or broken grain seed, weed seed, hulls, chaff, joints, straw, elevator dust and floor sweepings. They are quite variable in composition. A digestion trial was run using 3 sheep in order to determine the total digestible nutrient (TDN) content of a typical sample of ground refuse screenings, both when fed alone and when fed in combination with chopped alfalfa hay. The gross composition of the refuse screenings on a dry basis was 9.6% ash, 7.3% ether extract, 16% crude protein, 17.2% crude fiber and 49.9% N free extract. The TDN content (wet basis) of the screenings when fed alone was 58.4 as compared to 61.6 when fed with alfalfa hay. A test run to determine weed seed content and viability of the weed seeds in the ground refuse screenings showed that while 10 vars. of weed seeds were present, none was viable after being submitted to digestive processes.

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