Soybean hulls are a byproduct of processing soybeans for soybean meal. They are higher in digestible energy than other hull products. Raw whole soybeans are usually avoided because they contain substances that decrease growth rate in most species of livestock. Since heat processing destroys these growth inhibitors, soybeans should be heat processed. Sunflower hulls are the outer covering of sunflower seed.
Hulls contribute fiber and are relatively low in other ingredients.
Sunflower meal is the byproduct that remains after removing oil from sunflower seeds. Nutrient content of sunflower meal varies with the amount of hull included in the meal. As hull content increases, protein, fat, and energy content decrease. As the hull content increases, lysine content will decrease. As phosphorus content is relatively high compared to calcium content, rations using sunflower meal will need calcium supplementation, and sunflower meal will need to be mixed with feedstuffs lower in phosphorus.