Feedstuffs Feedstuffs Feedstuffs are often classified as forages and concentrates, but these divisions are not always clearly definable. Concentrates usually mean high quality, low fiber feeds and the cereal grains, milling by-products, protein sources, and fats.
Concentrates have high digestible energy content per unit of weight or volume.
The energy is derived mostly from starches, sugars, other readily available carbohydrates, and fats or oils. The digestible energy content of forages is usually lower per unit weight or volume than concentrates, with most of the energy derived from cellulose or hemicellulose. Classification problems arise with high quality, immature forages, as these are more like concentrates than forages. For example, bud stage alfalfa with 24 percent ADF and 36 percent NDF is classified as forage, while beet pulp with 33 percent ADF and 54 percent NDF is classified as a concentrate.