Jun 21, 2011 · In order to determine the influence of different crushing machines and grinding systems on the feed structure, a typical pig feed mixture was designed containing barley, approx. 30%, rye, wheat, soybean meal, rape meal, mill by-products, and premixes.The "natural" content of fines of
its way into soybean meal as a livestock feed . ground with a hammer mill to produce a uniform particle size prior to shipment to . 48 percent protein, and is referred to as high protein meal. In some soybean processing operations, soybean hulls, or soybean mill-run, are added back to the meal to adjust the protein levels of the meal prior .