P C B 



Quadrat-bisect ehowiug the root distributioD of certain dominant and subdominmit plains species; 

 A, Aristida purpurea; B. BouteLoua gracilU; At, Artemisia frigida; P, Psoralea tenuiflora; C. 

 Chrysopsis inUosa; Y, Yucca glauca. 



