Feedipedia is truly one of the best online encyclopedia's of feed values of just about any utilized species or by-products in the world! From this websites VAST range of feed products you will be provided a description/recommendation, tables of common feed values and an extensive reference sheets for further investigating. Almost all the information provided is excerpts from published research articles, adding to the creditability of the information. Many feed products will have information on the uses for large ruminates such as cattle and many times provide information on other species including monogastric or small ruminate livestock. Utilized by hundreds of thousands of individuals around the world, I would highly encourage you to be the next!
University of Georgia Extension has published an excellent article explaining the Relative Forage Quality (RFQ) test. This simple read explains how the forage score is determined, what the results mean and this forages is suitable to feed various animals. There are a number of well made charts/graphs explaining the result scores and how various forages traditionally will score.
This link provided by NDSU Extension very briefly runs through a large array of feed products utilized for ruminants. The array of feed possibilities listed have a very blunt description. Then, theres a large table describing the feed attributes commonly associated with that product.
SmartMix is the best cover crop decision making tool in the industry. Get ratings for species suitability based on goals, planting dates, geographic location C:N ratio, nitrogen fixation, grazing suitability, frost tolerance and more.