http://hdl.handle.net/10150/635616 Sun, 10 May 2026 17:55:12 GMT 2026-05-10T17:55:12Z http://hdl.handle.net/10150/650467 Journal of Range Management, Volume 34, Number 2 (March 1981) Complete digitized issue. Sun, 01 Mar 1981 00:00:00 GMT http://hdl.handle.net/10150/650467 1981-03-01T00:00:00Z http://hdl.handle.net/10150/646436 Winter Variation in Nutrient and Fiber Content and In vitro Digestibility of Gambel Oak (Quercus gambellii) and Big Sagebrush (Artemisia tridentata) from Diversified Sites in Colorado Kufeld, R. C.; Stevens, M.; Bowden, D. C. Nutrient and fiber content and in vitro digestible dry matter (IVDDM) were measured in Gambel oak (Quercus gambellii) and big sagebrush (Artemisia tridentata) samples collected during January from nine geographic areas distributed widely throughout the western half of Colorado, and representing three vegetation types. Coefficients of variation among areas were less than 10% in both species in dry matter content, IVDDM and most cell and cell wall components. Variation appears to be small enough to permit application of a suitably selected, constant value, which would reflect winter nutrient content, fiber content or digestibility of these species, regardless of where collected in Colorado, in surveys where winter nutritional status of big game rangelands is being estimated for management purposes. Sun, 01 Mar 1981 00:00:00 GMT http://hdl.handle.net/10150/646436 1981-03-01T00:00:00Z http://hdl.handle.net/10150/646429 Use of a Profile Board in Sand Shinnery Oak Communities Guthery, F. S.; Doerr, T. B.; Taylor, M. A. A profile board adapted to sand shinnery oak communities gave highly accurate structural profiles of the vegetation. Using actual estimates of percentage screening of strata by foliage was more accurate than using percentage screening classes. The procedures used to adapt the profile board to sand shinnery oak communities can be used in other plant communities. Sun, 01 Mar 1981 00:00:00 GMT http://hdl.handle.net/10150/646429 1981-03-01T00:00:00Z http://hdl.handle.net/10150/646418 Temperature Profiles for Germination of Bluebunch and Beardless Wheatgrasses Young, J. A.; Eckert, R. E.; Evans, R. A. The germination of seeds of beardless and bluebunch wheatgrasses was investigated over a wide range of constant and alternating temperatures. Seeds of 'Whitmar' beardless wheatgrass, a collection from Nevada, and numbered accessions of bluebunch wheatgrass were used. Seeds of 'Whitmar' beardless wheatgrass germinated at 87% of the 55 temperature regimes tested with a mean germination of 52%. Germination at 42% of the temperature regimes was optimum [defined as not significantly (P = 0.01) different from maximum], with a mean of 84%. Freshly harvested seeds of the Nevada source of bluebunch wheatgrass germinated at 78% of the temperature regimes with a mean of 40%. Comparable figures for fully ripened seeds 5 months after harvest were 84% with a mean of 62%. The germination response of 1-month old bluebunch wheatgrass seeds indicated that germination could occur at the high seedbed temperatures encountered in a late summer moisture event. The temperature-germination profiles for the numbered accessions of bluebunch wheatgrass had the same general pattern as the Nevada source. Generally, seeds were highly germinable at a number of temperatures. Optimum germination of all the sources of seed occurred at 37 temperature regimes at least once and always occurred at 15 temperatures ranging from an alternating 5/15 degrees C through a constant 25 degrees C. This range of germination temperatures is much wider than that exhibited by squirreltail and Sandberg bluebunch. The bluebunch wheatgrass material has the inherent potential to germinate and to be highly germinable at a wide range of temperatures. Sun, 01 Mar 1981 00:00:00 GMT http://hdl.handle.net/10150/646418 1981-03-01T00:00:00Z