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inanounwn:sa�, <br /> contribute 8.0 percent and 6.9 percent relative cover, respectively, averaged over all <br /> plots. The most abundant forb, in terms of relative cover, is cicer milkvetch, with 8 <br /> percent relative cover averaged over all plots. Blue aster and ox-eye daisy contribute <br /> 4.4 percent and 4.7 percent relative cover,respectively, averaged over all plots. <br /> Table 3 shows vegetation production data. These data are summarized in Table 4. <br /> Average production over all plots is 10.8 g 0.25m-2(oven-dry). The highest producing <br /> species is orchardgrass at 3.3 g 0.25m-2 (oven-dry), averaged over all plots. Bromar <br /> brome and orchardgrass contribute 1.4 g 0.25m-2 (oven-dry) and 1.3 g 0.25m-2(oven- <br /> dry) total production,respectively, averaged over all plots. Cicer milkvetch and blue <br /> aster contribute 0.7 g 0.25m-2 (oven-dry) and 0.6 g 0.25m-2 (oven-dry) total produc- <br /> tion,respectively,averaged over all plots. <br /> No shrubs were encountered in either transect or quadrat sampling. One small rose <br /> (Rosa sp.) seedling was observed in one plot. <br /> Oualitative Observations <br /> The spoil material appears suitable as a plant growth medium. Moisture is not limiting. <br /> Growth of introduced species, in particular, is enhanced by fertilization. Long term <br /> maintenance fertilization may be required for these species to survive. The lack of long <br /> term fertilization would probably favor native species adapted to low fertility <br /> environments. Another significant limitation to long term growth and survival is the <br /> short growing season. Plant species must either be able to reproduce vegetatively or be <br /> able to produce seed within a short season. It is too early to tell whether this will be a <br /> limitation for some species growing on the plots. <br /> �..,�. <br /> Bye . most limitingfa�c �r�t sttccessfully.?reyegetatirYg:these sites'is the.steep, <br /> s',cc� ur ace rristability due to sloughing and creeping can prevent new plant <br /> estabhs went. 'This effect is apparent at all three plot locations, where the upper <br /> portions of the plots exhibit significantly greater vegetation cover than the lower parts. <br /> It is not known to what extent this may also be due to ineffective seed coverage on the <br /> lower parts of plots when the,.plots were,seeded. <br /> Pe �,bertoallow anora'tiiiif�2nit- bahmen fro-tem p toobbottom. m <br /> .:snrl~acx;�u�sta.,trilityF a <br /> ,'Revegetatiod of Ahese'slopes`rnightfurther-be enhanced by,-planting live seedlings or <br /> cuttings�o�"�voo�°y p'�ants: <br />