Table -4. Art:i;:1sifi tridontata/Agropyr-.in sinittii i/Baiito'loua gra cilis Community Ty|:e Site Description 



Pujitive siope-slope asr.ect vai'jes 

 Slope-sijpe aspect values of 0: 48:' 



Nega tive slope-sl c oe as ce ct valu e s 



Sites for the Artr/Agsm/Bogr c.t. might best be compared to sites of the 

 Agsm/Bogr, Bogr/Agsm, and Arca/Agsm, and Arca/Agsm/Bogr c.t.'s. The most 

 noticeable difference between sites for the Artr/Agsm/Bogr c.t. and the Agsm/ 

 Bogr and Bogr/Agsm c.t.'s is in slope position. The Artr/Agsm/Bogr c.t. is 

 found more often on the higher slope positions. Slope-slope aspect values are 

 cooler for the Artr-Agsm/Bogr c.t. sites, but the difference is significant 

 only at the 0.2 probability level. Artr/Agsm/Bogr c.t. slopes are steeper than 

 Bogr/Agsm c.t. slopes (.05 probability level), but not significantly steeper 

 than Agsm/Bogr c.t. slopes. Horizontal configuration is more often straight 

 for the Agsm/Bogr and Bogr/Agsm c.t. than for the Artr/Agsm/Bogr c.t. Soils 

 of the Agsm/Bogr and Bogr/Agsm c.t.'s often have less clay than Artr/Agsm/ 

 Bogr c.t. soils. More intensive grazing is indicated on the Bogr/Agsm c.t. 

 than on the Artr/Agsm/Bogr c.t. 



The most striking difference between sites for the Artr/Agsm/Bogr and 

 Arca/Agsm/Bogr c.t.'s is once again slope position, with Arca/Agsm/Bogr c.t.'s 

 being found at much lower slope position. In fact, when both communities exist 

 in an area, the Arca/Agsm/Bogr c.t. is generally found in coulees and on flats 

 above creeks while the Artr/Agsm/Bogr c.t. is found on slopes above the flat or 

 coulee. Partly as a consequence of this, the Arca/Agsm/Bogr c.t. is usually 

 closer to a watering source. 



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