Browsing Journal of Range Management, Volume 25, Number 1 (January 1973) by Title
Now showing items 24-26 of 26
Taxonomic and Agronomic Variation in Agropyron spicatum and Agropyron inermeThe main morphological distinction between bluebunch wheatgrass and beardless wheatgrass is the presence of geniculate awns in the former and the absence of awns in the latter. Open pollinate progenies of plants classified as either A. spicatum or as A. inerme segregated clearly for this trait. This indicates the mere presence or absence of awns does not afford reproductive isolation; thus, the species designation is questionable. In addition, variation for rhizomes was detected in the progenies of bunch type plants, but segregation was not clear cut. Significant variation among progeny means for forage yield was also detected. There is apparent, real potential for varietal development, but care must be exercised in mixing awned and awnless types.
Trends in Western Ranch Prices and ValuesIn the 1930's the western stock ranches were generally underdeveloped and underpriced in terms of their potential. Over the past 40 years, however, a number of factors have, in combination, greatly changed this situation. Now, the picture is that of overpricing, and to such a degree as to cause difficult problems in ranch management and in land management.
Western Wheatgrass Germination as Related to Temperature, Light, and Moisture StressGermination of western wheatgrass was best when seeds were held for 16 hr at temperatures between 55 and 75 F and 8 hr at temperatures between 75 and 90 F daily. Germination was independent of light but was severely reduced by moisture stresses above 1.0 atm.