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olscusslow <br />Several interesting points can be demonstrated by this; study. <br />These include: <br />The need for cold stratification of serviceberry seeds was <br />demonstrated by the spring 1976 seeding. On this planting no <br />seedlings emerged until the spring of 1977 when about 20 plants <br />were counted in each of the three rephai~ations. However, because <br />of the extremely dry late spring and early summer most of these <br />seedlings had died by the time of vegetation analysis, and thus <br />do not show up on Table • <br />Because of vegetative reproduction by rhizomes, the western <br />wheatgrasses are well adapted to take advantage of any opening <br />in the vegetative cover. Where plots adjacent to western wheat- <br />grass plots have only sparse cover, western wheatgrass is vigorously <br />invading. • <br />4lhereas all the wildryes evaluated have produced excellent <br />cover, there is considerable difference between biomass produced <br />by the different species. The basin wildryes were most productive, <br />with 4931 kg/ha dry weight for the seed source from Bridger, MT <br />and 3243 kg/ha dry weight for the Garfield county seed source. <br />Russian wildrye and beardless wildrye produced significantly less <br />biomass with 1704 kg/ha dry weight and 1099 kg/ha dry weight, ~• <br />respectively. _ <br />Finally, it is important to note the differences in success <br />between seedings of different years and different season. Because <br />of vagaries in climate it is possible even in the mountain shrub <br />tyj,a.to have s2ediny foilures due to.lar,k of precipitation. <br />