The Bogr/Agsm exclosure (silty range site) rated a solid fair condition in 

 1311 , a year in which grasshopper damage may have lowered the rating. In 1978 

 and 1979, the protected vegetation appeared to be in excellent condition with 

 about 90% of the theoretical climax community composition present. In 1980, a 

 year of drought but few grasshoppers, the condition seemed to return to fair; 

 about 30% of the theoretical climax was present. 



The Agsm/Bogr exclosure occupies a clayey range site. This exclosure rated 

 a good (almost excellent) condition in 1977, 1978^ 1979, despite great 

 variability in productivity values. However, in 1980, the condition slipped to 

 poor, with less than 15% of the theoretical climax present. Changes of this 

 magnitude under exclosure conditions indicate a need to incorporate the effects 

 of climatic fluctuations on both early and late successional vegetation into 

 range condition estimates. 



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