A CRITERION OP SITE 261 



other feasible criteria since it may be found that one may serve 

 as an excellent check on the other or may even more closely 

 indicate the true potentiality of a given site quality. While a 

 standardization of technique or methods is highly desirable, 

 latitude should be given for a careful correlation of all feasible 

 criteria and a proper interpretation of their significance. In 

 previous discussions of site determination in North America, 

 little or no attention has been given to the consideration of the 

 indicator significance of native shrubby and herbaceous vegeta- 

 tion in the classification of the potential productivity of forest 

 lands. This criterion should be of the utmost value not only in 

 determining the relative productivity of forest sites, but also in 

 explaining the presence or absence of tree growth on certain areas 

 and in the judicious selection of the proper species and suitable 

 sites in reforestation work. 



