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36 while the nitrogen and mulch additions in Treatment 6 give this method a slight advantage from a vegetation growth standpoint. On steeper areas the use of mulch would be more crucial. Treatments 2-6 gave good levels of vegetation; however, the question as to whether the soil is equally good to maintain that population of species remains unanswered. At present, all treatments are 5 to 10 times lower in organic matter and total nitrogen; sharply lower in potassium, zinc, and copper; and only moderately lower in nitrate than the Reference Areas. The manured treatment showed closest results (Appendix, page 69). This does not constitute a deficiency, and at present none of these nutrients are particularly lacking to the plant (Table 8). However, it stands to reason that the less you have, the greater your potential for problems to occur. The point to be made is that future soil analysis and possible fertilizer amendments should be recognized. Treatment 7 is a special case in itself that dictates further investigation. In 1978 and 1979 manure was removed from the analyses because of extreme numbers of invading weeds it introduced. In 1980 it was again sampled, and while very different species composition make it somewhat diffi- cult to analyze against Treatments 1-6, some important characteristics should be noted. To begin, it produces a cover and biomass slightly lower, yet similar to that found in other fertilizer treatments (Figures 6 and 7). What is of special interest, however, is the very high density of plants this treatment supports. While the prolific reproduction from the annuals cheat- grass and kochia are the main cause of this high value, the fact that so many germinate each year given the variability of precipitation at this site leads one to appreciate the superior seedbed characteristics of manure over all other treatments tested. The fact that no other treatments show very high