From 1952 to 1954 studies were conducted on foothill ranges of central Utah to determine the forage production, palatability, and nutritive value of some of the more important native and introduced species used for spring and summer grazing.
Plants studied were four introduced wheatgrasses (crested, tall, pubescent, and intermediate) , four native grasses (western wheatgrass, beardless wheatgrass, squirreltail grass, and Indian ricegrass), and two introduced annual forbs (Russian-thistle, and smother weed).
Field digestibility trials were conducted to determine the nutrient content by the lignin-ratio technique. In addition, both sheep and cattle preferences were studied on areas where both introduced and native species were planted.
Cook, C. Wayne; Stoddart, L. A.; and Harris, Lorin E., "Bulletin No. 385 - Comparitive Nutritive Value and Palatability of Some Introduced and Native Forage Plants for Spring and Summer Grazing" (1956). UAES Bulletins. Paper 347.