Range forage provides the foundation for the maintenance ration available for most sheep wintered in Utah. The nature and amount of supplemental concentrate or roughage needed with this forage to provide an adequate and efficient ration for sheep naturally depends on the nature and amount of range forage available. Present uncertainty as to the relative merits of the various available supplements originates largely through a lack of definite knowledge as to the composition and feeding value of the various range plants that go to make up the range-forage supply on the particular range in question.
E. J. Maynard
Esplin, A. C.; Greaves, J. E.; and Stoddart, L. A., "Bulletin No. 277 - A Study of Utah's Winter Range: Composition of Forage Plants and Use of Supplements" (1937). UAES Bulletins. Paper 239.