the plotted point may ordinarily be used as the 10-foot site 
index of the stand examined, although the index can of course be 
interpolated to the nearest foot. 
(8) If possible obtain a similar figure (interpolated to nearest 
foot) for several stands on the site to be identified, and assume 
that the average of these measurements is the correct site index. 
A less accurate method of site determination is the selection of 
about a dozen trees covering the diameter range of the dominant | 
trees in the stand whose site is being investigated, upon which 
computations are based as with the dominant trees in the plot 
method. No satisfactory method is yet known for identifying 
site from trees in a virgin forest or scattered individuals on cut- 
over land. 
If the stands examined for site determination are mixtures 
(less than 80 per cent one species), each species must be treated 
separately. 
